Comments David Mack has made
ids
I'd be interested in an explanation about the Citizen Utility Board's support as well.On Another rate increase in the name of cheap coal posted 10 months, 2 weeks ago 27 Responses
ids
If you just divide the capital cost by the capacity, you get around $4700/kW of capital costs, about $1000/kW higher than coal plant Sean says is already very expensive in his initial post. This may not increase rates more than 2% because the cost of this small facility may be averaged with other cheaper plants. The point is that new coal plants, let alone clean coal, are not cheap. On Another rate increase in the name of cheap coal posted 10 months, 2 weeks ago 27 Responses
Sean
Can you comment on combined heat and power's ability to attract venture capital. How profitable are CHP projects under today's regulatory regime? Are you worried that your access to capital will be reduced if and when the "greentech" boom goes bust?On The VC models are to blame, not the green technologies posted 11 months, 1 week ago 34 Responses
Sean
I feel your frustration. You and your dad have been at it for so many years. Keep up the good fight. The more profitable Recycled Energy is, the more competition you will have and the more investment in cogen. Maybe if wall street realizes it can make money on this, and even more with deregulation, it will get on board. On The electric sector's price inversion posted 1 year, 3 months ago 5 Responses
Who are your allies in achieving deregulation?
You do an excellent job a pointing out the signs of rapidly increasing electricity prices. The conventional media spends very little time discussing how future electricity generation will affect power prices. A few weeks ago you showed coal plant proposals at $3700/kW as an example of expensive coal.
Picken's plan is for wind to generate 20% of US electricity, replacing natural gas that could then be used for transportation. He estimates it would cost 1 trillion plus 200 billion in transmission and that seems really expensive. Does that figure even seem realistic to you? It also doesn't make sense to replace peak power with intermittent power, so I'm pretty sure he's pushing this policy out of self-interest.
It seems to me that industry has noticed the electricity inversion caused by the regulated market. They see it as an opportunity to lobby the next set of regulations in their favor for the next build cycle. If regulations stay the same and expensive coal gets built, the ratepayer pays. If plans like Pickens' or other big renewables get subsidized, the taxpayer pays. If we're paying anyway, we might as well build renewables, but let's look at other options first.
CHP seems to be the only cheap source of power. I've seen your company make claims that CHP could replace 20% of US capacity for only 350 billion in capital costs, less than a third of the wind plan estimate. So you're lobbying for deregulation, in your interest and the rate/taxpayers'. There must be a constituency for cheap and efficient electricity that can help your lobbying efforts. I see you're trying to get the environmentalists on side by posting here. How about manufacturing? Are they not lobbying for CHP because the utilities buy them off with cheap power deals? Is there another cheap power source that is held back by regulation?On The electric sector's price inversion posted 1 year, 3 months ago 5 Responses
Sean- I wasn't as clear as I thought
I was trying to make a point that your version of OBS treats electricity differently than other commodities such as steel, gasoline... I made up a hypothetical OBS that only alloted credits for CO2/MMBtu. I tried to explain that this hypothetical policy would incentivize efficient boilers but would be agnostic to how the heat is transformed into energy. There would be a wealth transfer from those using inefficient coal boilers to high efficiency natural gas boilers, accelerating the deployment of the latter. Efficiency in the heat to electricity process would only be incentivized by the resulting increase (or decrease) in the price of heat. There would be no wealth transfer to those who efficiently make electricity and no accelerated deployment of capital. Clearly, this hypothetical policy wouldn't accomplish our goals, and that is why electricity is added to OBS with a CO2/MWhr standard.
I created this lengthy example to draw the parallel with how the production of commodities are treated. Your proposed OBS is agnostic to how heat is used to refine aluminum, steel, oil... just as my straw man OBS is agnostic to how heat is transformed to electricity. The result of your proposed OBS is that there will be a wealth transfer that will accelerate deployment of efficient boilers in commodity production. Deployment of efficient processes will only be incentivized by the resulting changes in price for heat and electricity.
The question I was getting at is why should the electricity and boiler sectors be allocated extra capital as opposed to investment in improving industrial processes. To get an efficient policy outcome, all reductions in GHG's must be treated as equally as possible.
I've since realized there are a few features about electricity that make it deserve its special place in GHG policy.
- Electricity is completely fungible. As long as the grid is working properly, I can't tell where my electricity is coming from. A unit of heat is the same, which make standards like CO2/MWhr very simple. Steel has different alloys, different grain sizes that make CO2/ton steel much more complicated. I've come to understand why an OBS that accounted for different commodities would over-complicate things.
- GHG from the elecricity sector is 4x bigger than those from petrochemicals which is number 2. A GHG policy that puts a special focus on electricity is targeting the right sector.
- You've shown that the electricity sector is incredibly inefficient because of monopoly regulation. The lowest hanging fruit are there.
- Electricity can be made in numerous ways not involving fossil fuels such as hydro, wind, solar, something new... Since the electricity sector is so important, we want to incentivize all paths making clean electricity equally. These different paths don't really exist in commodity refining. They all need heat typically comes from fossil fuels.
- Your point that CO2 is best regulated at the point of release.
However, I've come to agree that attempts to incentivize other reductions through OBS would over-complicate it. Once the lowest hanging fruit are picked (points 2&3 are no longer true), it might be time to come up with new policies. Until then, OBS is the cheapest path to GHG reductions.
Is this a good assessment? I also apologize for quibbling over a minor point. On New white paper provides more details on output-based standards posted 1 year, 4 months ago 8 Responses
- Electricity is completely fungible. As long as the grid is working properly, I can't tell where my electricity is coming from. A unit of heat is the same, which make standards like CO2/MWhr very simple. Steel has different alloys, different grain sizes that make CO2/ton steel much more complicated. I've come to understand why an OBS that accounted for different commodities would over-complicate things.
Still not convined about commodities
So we agree on how to adjust the standard annually.
Your point about giving big hydro and big nuclear huge windfall profits is interesting. I never considered the political angle of getting their support and lobby dollars on side to push through the legislation.
On 3 and 4, I think you're right that OBS probably isn't the best solution.
On 2, I'm still not convinced. I read your discussions with Gar and Max on carbon policy 5. (did you have another discussion somewhere else?). I think the crux of the problem is your proposed OBS has sticks and carrots for only the heat and electricity sectors. Improvements in other sectors are incentivized by OBS to the extent that it raises the price of energy (ideally the price of energy won't rise under OBS) meaning that these likely won't happen. This isn't necessarily a bad thing, because the heat and electricity sectors are likely the lowest hanging fruit because they are industries (especially electricity) that have been protected from competition for years. I agree with the capacity factor argument that negawatts on the consumer side are not low hanging fruit. But I think the gray area is industrial commodities.
In an OBS that wants to deal with CO2 from fossil fuels, the only "commodity" that by definition has to be regulated is heat, because that is the useful output of combustion. Such a policy would incentivize efficient boilers in power plants, but would be agnostic to the heat to electricity process. It wouldn't care if natural gas was used to heat water to run through a vapor turbine, or used in a gas turbine. Clearly, this would be a very poor policy because the process of turning heat into electricity is one of the low hanging fruit in creating a low carbon economy and electricity is one of the largest GHG producing sectors. Also, many other paths not involving fossil fuels to make electricity exist and should be incentivized just as much as efficient conversion of heat. The point I'm trying to make is that stopping at the commodity of "electricity" in expanding OBS is arbitrary and the policy might be improved by adding steel, gasoline, aluminum, cement... The emission of GHG's from these sectors is also large, (about an order of magnitude smaller http://ecm.ncms.org/ERI/new/GHG.htm), and there may be low hanging fruit in these sectors as well. Your version of OBS creates a carrot and stick for boilers and electricity generation. This is a policy that "picks winning sectors", electricity and boilers, while treating all other solutions as less important.
The choice which commodities to regulate is somewhat arbitrary. I'd agree that Gar's example of tomato paste is a bit excessive, because it would be a huge mess calculating the savings from one brand of tomato paste to another. In sectors where the output is identical, this would be a lot simpler. I'd argue that its easier to measure output of a commodity than an output of heat. (but we'd lose the added benefit of adding heat measuring that would allow industry to understand how much heat they're wasting). To get an efficient outcome, we need to get as close to economy wide coverage as possible. I'd argue that adding bulk commodities that produce a certain amount of domestic emissions (perhaps greater than 1%), it might be a worthwhile complication. A side benefit is that commodity producers who have best industry practices would get windfall profits and join the nuclear and hydro industries in supporting and lobbying for this bill. A downside could be some industrial facilities with numerous outputs, like an oil refinery, would be very cumbersome.
So yes I agree that adding more "commodities" to OBS does complicate the bill, but certain large sectors could be added relatively easily and might be worth the effort. Experts from other commodity industries would be able to say how difficult it would be to expand OBS to their situation and the type of GHG reductions that would be incentivized. It might give you more allies in the political arena and lower the total cost of reaching GHG reduction targets. Perhaps this has already been studied, and the low hanging fruit is so overwhelmingly in the electricity sector that my point is moot, but I have yet to see this.
On New white paper provides more details on output-based standards posted 1 year, 4 months ago 8 ResponsesA few more thoughts
I forgot about the lifecycle footprint of commodities. The simplest example is fossil fuel production. A facility that efficiently uses heat to transform shale into gasoline should not get more credit than a producer that inefficiently refines conventional oil. A comprehensive carbon policy would have to find a way to look at the entire footprint of fossil fuels (and other commodities) from well/mine to finished product.
I don't really understand who owns transmission capacity. I'm guessing its the regulated utilities. Is there a way to incentivize improvements in the grid to remove line losses? I wonder how this could be linked to the carbon markets. I'm guessing that at some point, transmission investments will be competitive with other investments. Would the entire electricity model have to be changed or could this be achieved with the utility owned grid model?On New white paper provides more details on output-based standards posted 1 year, 4 months ago 8 Responses
Comment and question
- I think your conditions of 80% of the cost of the central option and half the ton as the grid are too rigid conditions. How would the commission decide between a CHP facility that is half as efficient as the grid that costs 79% of the central option and a wind facility that has zero emissions and costs 81%? Under your rules, the CHP plant would be chosen, while the wind facility probably meets the policy goals better. Its not initially obvious how to design a scale that maximizes reductions and minimizes costs, but I'm sure it exists.
- This sounds like a good near term policy to the impending increases in energy prices as new expensive capacity will soon need to be built, while also reducing GHS's. But it won't get us all the way to our goal until we think about replacing old inefficient generators. Under a system that puts a price on carbon (tax, cap, OBS), what type of generator would be the first to close? From your previous article, it is based on a mix of fixed and variable costs. Any price on carbon (tax, cap or OBS) would add significantly to the variable costs of coal and a lesser amount to the variable cost of natural gas. So which would be priced out of the market under carbon pricing: inefficient coal whose capital costs are paid, newer more efficient coal whose capital costs are not amortized (do these even exist?), and newer natural gas? Or is there no straight answer to this question? The reason I ask this question is to get buy in from the electric industry for future policies, we might have to make the utilities whole. I'm wondering which type of utility would be the biggest loser under carbon pricing.
- I think your conditions of 80% of the cost of the central option and half the ton as the grid are too rigid conditions. How would the commission decide between a CHP facility that is half as efficient as the grid that costs 79% of the central option and a wind facility that has zero emissions and costs 81%? Under your rules, the CHP plant would be chosen, while the wind facility probably meets the policy goals better. Its not initially obvious how to design a scale that maximizes reductions and minimizes costs, but I'm sure it exists.
Sean
Thanks for the heads up.
I've been thinking about a few ways to get output based standards to get larger economy wide coverage and give equal cost/benefits for polluters/reducers during the next 42 years.
- Assuming total delivered energy remains constant, the standards have to be tightened by 2.38 percent each year to get a 70 percent reduction in CO2 by 2050. This 2.38 will be adjusted based on actual energy use. I am certain that it will be cheaper to reduce either CO2 per useful thermal energy unit or electricity (not sure which one, but I'm sure it won't be equal). While not explicitly stated in the article, I'd suggest suggest taking this into account when re-averaging the output based standard on a annual basis.
- This plan does not account for the way heat is used in industrial production of steel, aluminum, glass, cement and others. Heat is an intermediate product and tonnes of these commodities are the final product. Your version of output based standards incentivizes industry to generate heat efficiently but then is agnostic to how well the heat is used to make the final product. For example, depending on the process used to make aluminum, different amounts of delivered heat are needed per tonne produced. In certain energy intensive industries (perhaps any commodity industry that produces more than .5% of US CO2 output), give them their own standard for CO2 per tonne of commodity. These markets could be linked to the other carbon markets. Of course, if they can recycle waste heat, they should be given credits for those units of delivered energy.
- On a similar vein, output based standards do not account for "negawatts". When I heat/cool my home, my output is not delivered Btus, but a house in which I am comfortable. So it does not account for the efficiency of my house converting delivered units energy into my desired output. Under your plan, if the price of delivered energy goes up, there is a "stick" to build more efficient homes, but no "carrot". I imagine including residences into OBS would be a nightmare. Perhaps the building code for insulation could be adjusted based on the CO2/unit energy spot prices and average regional temperatures. I'm not sure how to pay for this. Perhaps an government auction element in the carbon markets to raise money for these "negawatts". Perhaps a tax on heating oil. The same type of ideas could be used for retrofits, but it is more expensive to renovate to a certain code than to build to that code in the first place. I'm not sure how to bring competition into the insulation market.
- The same can be said for appliances and fuel efficiency. I'd suggest regulation such as CAFE standards for cars and appliances. One market possibility is that manufacturers who produce items that are less efficient than the standard would have to buy credits from manufacturers above the standard. With assumptions about average use of these devices, it would be possible to link the car and appliance market to the broader carbon markets. However, I'm not sure if this level of regulation to get larger economy wide coverage is worth it.
- I agree that hydro and nuclear producers should get an allocation of credits for the electricity produced in the long term. All energy options must be treated equally to get the desired result. However, in the first few years, output based standards represent a huge unexpected windfall to ~31% of US electricity producers. I don't see how this windfall profit reduces GHG's. Perhaps we can phase in the amount of credits already installed facilities get over 10 years.
On New white paper provides more details on output-based standards posted 1 year, 4 months ago 8 Responses- Assuming total delivered energy remains constant, the standards have to be tightened by 2.38 percent each year to get a 70 percent reduction in CO2 by 2050. This 2.38 will be adjusted based on actual energy use. I am certain that it will be cheaper to reduce either CO2 per useful thermal energy unit or electricity (not sure which one, but I'm sure it won't be equal). While not explicitly stated in the article, I'd suggest suggest taking this into account when re-averaging the output based standard on a annual basis.
Max
You're right that there would be speculators/investors willing to sell long term credit contracts, betting that the spot price would be below a certain value. I'd say that its a risky bet and I would ask for a big premium from a polluter seeking cost certainty. I think this would be less of a problem with clean energy producers with allocated credits selling long term contracts also wanting price certainty.
You're right that my thoughts about R&D is a cop out. I'd consider a hybrid system that mixes OBS with an auction. (ie. if government decides a certain project is worthwhile, it could withhold a certain percentage of credits and auction them to raise money. if this were done when prices spiked, it would have a volatility reducing function as well)
I haven't read LW about how it would affect family finances, but from what you say, it doesn't seem like it accounts for the price inflation in almost everything if there were a policy that took money from the energy sector. If there is no investment in the energy sector (free allocation), energy prices must go up significantly for clean technology to become profitable and thus be deployed. I admit this inflation would also occur under a free allocation by OBS, but I'm quite certain it would be less because clean technology would be deployed at lower energy prices.
Another problem with this type of progressive policy is that if it is successful at reducing carbon, the revenue disappears, but energy prices are still high. Let's say that in 30 years, emissions are down 50% and credits have doubled from 25 to 50$. The same revenue would be collected by the government but double would have to be distributed for the policy to still be progressive. If energy prices go up and tax rebates don't, then this becomes a regressive policy. I'm saying that the average person might be better off in the long run simply with lower energy prices than a tax rebate and high energy prices. I'd be interested a study comparing these options. On Smart ideas for post Lieberman-Warner climate policy posted 1 year, 4 months ago 71 Responses
Max
In most commodity markets, producers have predictable future production (farmers, miners etc...) and they have a choice to lock in the sale price. Industrial consumers have predictable supply needs and they might choose to lock in a purchase price. I admit that speculators will come in and make bets, not planning on ever using the commodity. In your version of cap and trade, there will be no sellers trying to stabilize future revenues. Only speculators who are betting on prices going down can sell long term supplies of credits. Something about this makes me uneasy, but it may be workable.
I have a hard time believing that price increase that 80% percent of families face will be less than what they receive in a tax rebate, with money left over. That sound too good to be true. Who then is paying for the credits?
I agree that government should be doing advanced R&D and perhaps even large scale proof of concept deployment. But I could also support this being paid for by other sources.
Your argument that OBS represents a distortionary subsidy to clean energy producers is an interesting one. My first response is that this subsidy is necessary to correct a power grid that was built without accounting for externalities.
Another thing that comes to mind is a paper co-authored by Sean's father that tries to show that the energy sector is different from other sectors of the economy. It says that economic growth is correlated to the price an economy pays for delivered energy. A price on carbon that does not allocate revenues to the energy sector would be a net tax on energy and could slow the economy. http://www.sciencedirect.com/science?_ob=ArticleURL&_ ...
I'm not an economist, but it seems plausible to me. On Smart ideas for post Lieberman-Warner climate policy posted 1 year, 4 months ago 71 ResponsesKen
In general, I don't have a problem with a minimum price. I'm not sure how it would be enforced, except if the government promises to buy any unsold credit for a specified low price. The fact that the spot price is going to the minimum price suggests that the cap isn't being tightened quickly enough. So if it turns out to be very cheap to reduce GHG's, then I would suggest increasing the rate at which we reduce them, likely raising the price above this minimum.
On Smart ideas for post Lieberman-Warner climate policy posted 1 year, 4 months ago 71 ResponsesKen
If I understand what you're saying, I think you're making an interesting point. I'll give an example of dealing with some pollutant
Environmental benefits:
80% reduction, 1000$ per ton
90% reduction, 1200$ per tonEstimated costs:
80% reduction, 800$ per ton
90% reduction, 2000$ per tonThe reasonable thing to do is develop a plan to reduce by 80%.
Actual abatement costs (since they are usually cheaper than estimates):
80% reduction 300$ per ton
90% reduction 900$ per tonWith these new numbers, it now makes sense to change the environmental policy to demand a 90% reduction in pollutant. If I understand right, with the clean air act, since compliance costs were so low, the cap should have been tightened even more in response because there is now a net benefit to do so. Is this correct? If so, I still don't see why a well designed cap and trade could not meet these needs. Maybe you just don't trust politicians to steadily tighten the cap should abatement costs prove to be low? There is also political risk if the tax is set too low and not enough abatement occurs. Then you have to trust that politicians will raise the tax again. In the end, no matter what policy is implemented, the plan will have to be modified as we learn about the effects the policy has. On Smart ideas for post Lieberman-Warner climate policy posted 1 year, 4 months ago 71 Responses
Des Emery
I think that we do want to find the least expensive solution. An economy or society has a finite amount it is willing to spend on environmental measures. The cheaper greenhouse gas reduction is, the more of it will happen. The way to do this is to give the market an incentive to produce clean or cleaner energy. It should compensate every technology essentially equally, even unconventional ones like GRL's. Risky technologies, like CCS that might not stay underground forever, might have to prove their usefulness or accept a smaller incentive. It is unwise to focus on a single technology, such as nuclear, because it is impossible to tell which is the cheapest beforehand. In any case, it is likely that cleaning up GHG's after they are produced is going to be more expensive than not making them in the first place, so CCS is unlikely to occur in a well designed market. But I'll accept surprises if they prove to be cheaper! A good starting point for this policy can be found here:
http://gristmill.grist.org/story/2008/4/1/202110/5791On CCS: Environmental whack-a-mole posted 1 year, 4 months ago 21 ResponsesMax
Your comments make more sense now that I understand your preference for auctioning of credits. I have a few more comments and questions.
- Under your system, I assume credits would be auctioned every year (or three months or something). Companies would estimate how many they need and buy that number. The secondary market is needed if a company's estimated number of credits needed is off. Since all credits must be purchased, the long term strips that Sean talks about to remove volatility would not work. It seems to me that you need to have a predictable allocation for you to sell a long term credit contract. The result is that your cap and trade system would not subsidize clean technologies such as wind, solar or CHP (it would not give them "free capital"). It would only promote clean technologies once energy prices go up due to the cost of credits working its way to the energy user. My guess is that companies would face more volatile carbon credit prices under your system than under output based standards because they have fewer financial instruments available to them to hedge against the volatile credit spot price.
- Your version of cap and trade seems very similar to a carbon tax. The difference is that instead of the government choosing a stable tax rate with uncertain amount of reductions, government mandates a level of reduction and lets the market set the value of the tax. I see that you have a wishlist of worthwhile projects to spend the auction revenue on. Why do you think government can come up with a more efficient allocation of this money compared to an output based system directing money to the most cost effective clean energy sources? I admit that it would be complicated to design output based regulations that compensate all forms of energy use fairly. However, if time is spent to design these rules optimally, we'll get an efficient result. No matter how much time the government takes to give away the carbon credit revenues, I doubt that they will choose anything near an economically efficient solution.
- I read your example about how electricity rates are based on the bid of the highest price producer (presumably fossil fuel based). I could imagine that the electricity price would initially increase. (it would probably increase more when all credits are auctioned, and increase less when credits are allocated). With output based standards, clean energy providers would benefit by selling their product for more money AND from the subsidy they receive in the form of their credit allocation. The "free capital" clean energy producers are given is the beauty of output based standards. I imagine that investment in clean energy will occur a lot faster under output based standards, displacing inefficient fossil power that is now expensive. Once this occurs energy prices would increase at a slower rate (or maybe even decrease) than under an allocation. I see low energy prices being more advantageous than spending the auction money on corporate tax cuts or assistance to the lower and middle class.
- Under your system, I assume credits would be auctioned every year (or three months or something). Companies would estimate how many they need and buy that number. The secondary market is needed if a company's estimated number of credits needed is off. Since all credits must be purchased, the long term strips that Sean talks about to remove volatility would not work. It seems to me that you need to have a predictable allocation for you to sell a long term credit contract. The result is that your cap and trade system would not subsidize clean technologies such as wind, solar or CHP (it would not give them "free capital"). It would only promote clean technologies once energy prices go up due to the cost of credits working its way to the energy user. My guess is that companies would face more volatile carbon credit prices under your system than under output based standards because they have fewer financial instruments available to them to hedge against the volatile credit spot price.
Max
I'd just like a clarification of what you mean as a price floor and ceiling. Are you saying that the government would step in and buy credits if there was an oversupply in the market? For example, due to negative cost CO2 abatement in the first few years, CO2 emissions decrease well below the cap. That would mean that there are more credits than there are buyers and the spot price would plummet. You're proposing that the government would step in to buy the oversupply at a low cost? That means that the spot price will never go below this value and that the government is willing to subsidize any project that reduces CO2 below this cost.
When you talk about price ceiling, do you mean that the government will sell any number of credits at some high price, or only the same number that were purchased at the floor price? After that number of credits at the ceiling are sold, the price ceiling is eliminated?
Can companies bank credits for future use in your system?
Also, you made a comment that you think there is a better way to allocate credits than output based standards. Could you briefly explain it or point me to another post?On Smart ideas for post Lieberman-Warner climate policy posted 1 year, 4 months ago 71 Responses
SPG
If you read more of Sean's posts, you'll see that he a CEO of a company that recycles waste heat. In typical fossil fuel power plant, 66% of the heat is thrown out through the smoke stacks. Sean's company places small power plants near industrial and other heat users where up the wasted heat can be used. Use of up to 90% of the heat from fossil fuels can be achieved. There are many variations on this idea. Currently, monopoly rules in the regulated power sector and unintended consequences of the clean air act stop his company from growing faster. He estimates that by just properly using the energy that is wasted in industrial sites, 200 GW (20% of the capacity of the American grid) could be added to the grid. If it weren't for the monopoly rules and clean air act, the 200 GW of capacity could be added profitably at no incremental increase of greenhouse gases. This could displace coal capacity. While your idea of ratepayer-producers having on site wind and PV cells may well turn out to be economic some day, there are even cheaper solutions that the general public should know about. On Costs for utilities rise faster than politically palatable rate changes can keep up posted 1 year, 4 months ago 28 Responses
Des Emery
The reason why it doesn't make sense to separate CO2 into C and O2 is that carbon dioxide happens to be a very low energy molecule that releases a lot of thermal energy when it is formed. When burning fossil fuels, CO2 is the desired product, as opposed to CO (carbon monoxide) or other pollutants. I'll try to give you a simple example of thermodynamics of combustion. Let's say we're burning one unit (mol) of methane (CH4), the simplest hydrocarbon.
Hydrocarbons typically burn with oxygen (O2) to form carbon dioxide and water, with the water in either vapor or liquid form.
CH4 + 2 O2 --> CO2 + 2 H2O
The energy released are as follows:
889 KJ if the product is liquid water
802 KJ if the product is water vaporKJ are kilojoules, a unit of energy
The products you get depend on the design of the combustor and whether the heat from the water vapor can be captured. Above, I've described an ideal reaction that assumes complete combustion and no production of carbon monoxide (CO) or other less desirable products.
Your question is how the reaction would change if we got solid carbon as a product. It impossible to get 100% solid carbon in a 1-step process, but let's say we designed a multi step combustion process can achieve the following overall reaction with no other losses.
CH4 + O2 --> C + 2 H2O
The energy produced would be:
496 KJ if the product is liquid water
409 KJ if the product is water vaporSo even if we could design a combustor that could could turn fossil fuels into solid carbon and water without significant losses (highly improbable), we'd only get about 55% to 51% (496 KJ/889 KJ to 802 KJ/409 KJ) of the energy we would get if the products were carbon dioxide and water. The other way to look at this is that there would be at least 45 to 49% losses using this process (probably more).
For carbon sequestration, the article estimates it would take 20% percent of the power of the plant to run the sequestration system, which is a significant improvement over storing the waste as solid carbon.
In any case, if you read more of Sean's posts, he claims that there are many cheaper carbon free sources of energy than techniques using sequestration. In the near term (10 years), I'd definitely agree with him. In the future, it is conceivable that losses due to sequestration (and other issues related to clean coal) are solved and clean coal becomes a cheap somewhat sustainable technology. Presently, I think its a ploy by the coal utilities to get subsidies to invest in something really stupid. The key is to design policies that don't favor any technology, but goals (clean energy). If coal with sequestration is that technology, so be it, but I wouldn't hold my breath.
There are also issues with making sure the CO2 stays below the surface. While it might seem easy, the cost of getting this aspect of the technology wrong is really scary. On CCS: Environmental whack-a-mole posted 1 year, 4 months ago 21 Responses
Joebhed
I can understand where you're coming from. I too want a solution to global warming that minimizes economic cost. If the economic cost is low, the rate of greenhouse gas reduction will be faster. Until a few months ago, I'd never heard of output based standards. I supported carbon taxes because I think they are a cost effective stick. They treat all tonnes of pollution the same way. I assumed that with a efficient stick in place, the market would eventually adapt to a carbon constrained world at lowest cost. I too was skeptical that a better option existed.
It will take a lot of investment to build a lower carbon world. I've accepted the argument that carbon taxes do not reward all sources of GHG reduction equally (at least in the short term). Without proper carrots, the investment required for the new low carbon world won't happen. The beauty of output based standards is that they distribute carrots in an economically efficient way too (which a tax doesn't do). They allocate money to the most effective technology to improve today's energy mix. I feel like I'm being a cheerleader, but I'd recommend you to go through Sean's blog posts on gristmill and his company website http://blog.recycled-energy.com/.On The goal of climate policy is not high GHG prices posted 1 year, 5 months ago 69 Responses
Joebhed
I'm just questioning your assertion that a carbon tax is the cheapest way to reduce greenhouse gases. I don't expect you to know why OBS were not included in their study. I largely agree with the CBO report that a tax is better than cap and trade (modified or not). However, I've accepted Sean's argument that OBS are even better.
To minimize the economic impact of GHG policy, the price of delivered energy must be kept as low as possible. In order to accomplish this, there need to be not only disincentives for "dirty" energy but efficient incentives for "clean" energy. A carbon tax that has only sticks but no carrots will lead to an underinvestment in clean energy and rising energy costs. I don't trust the government in subsidizing its favored clean energy technologies. I'd prefer a market based approach that Sean advocates. If the carbon tax revenue is used to pay for a tax cut, it would be a social policy investment, which has merit, but does not lead to lower GHG's.On The goal of climate policy is not high GHG prices posted 1 year, 5 months ago 69 ResponsesJoebhed
You use the CBO's study to support a carbon tax vs. Sean's output based standards. From the little I know about the CBO study, they seem to have only compared carbon tax and cap and trade and concluded carbon tax was most economically efficient of a small number of options. Had the CBO considered output based standards, their conclusions would probably be different. On The goal of climate policy is not high GHG prices posted 1 year, 5 months ago 69 Responses
Carbonless world midgame
So CHP is a good investment now (even better if you could capture its full value), but at some point may not be. My understanding is that power generation is very capital intensive and takes many years to amortize the investment. In today's uncertain regulatory environment, how long of an amortization period does an investment need to pencil out? If we had your wish list laugh-all-the-way-to-the bank regulatory regime, how would that affect the amortization period for new projects? I'm guessing that with more certainty about regulation, there would be less risk so investors or bankers would expect less of a premium and you could afford to take longer to recoup your investment. On Coal is no longer cheap -- so what comes next? posted 1 year, 5 months ago 43 Responses
Carbonless world endgame
I'm talking about 20 to 60 years in the future when CO2 emissions are down 40-80% from today's level. Let's assume we're in an ideal world where the output based regulation you propose goes through (as well as deregulation of the electricity market and amendments to the clean air act) and we're in a low carbon world where all energy technologies are competing on a level playing field. Centralized fossil fuel generation (without sequestration) has been removed from the energy mix because it by definition has a higher CO2/(MWhr or MMBtu) than CHP. So at this point, CHP is a high carbon energy source compared to whatever carbonless alternatives exist(nuclear, solar, wind or some future technology). I'm asking you to speculate what would happen to the deployed CHP assets. Off hand, I can think of carbon sequestration, burning biofuels or hydrogen (electrolyzed by a carbonless electricity). Or can you imagine a world where CHP combustion is not the most efficient way to generate process heat? It's a bit silly to think this far ahead, but if you can't imagine a world where CHP becomes obsolete, it's not only a bridge strategy, but an endgame strategy in a carbon free world. It would allow you to make the same arguments as the coal utilities about an end game strategy (sequestration in their case) but guarantee a lower cost. On Coal is no longer cheap -- so what comes next? posted 1 year, 5 months ago 43 Responses
Sean
Well designed output based regulation will lead to less carbon intensive sources of heat and electricity. In the short term, CHP is an excellent bridge strategy that can profitably reduce GHG and lower electricity costs, as long we're burning fossil fuels for process heat. So what happens when centralized coal and natural gas are pushed out of the energy mix and CHP becomes relatively carbon intensive (compared to nuclear or renewables)? Are there other good ways of generating high grade process heat? Or is this not an important question because a properly designed market will give an even less carbon intensive solution?On Coal is no longer cheap -- so what comes next? posted 1 year, 5 months ago 43 Responses