Comments sjjh has made

  • Inventing Cars, and Re-Inventing Cars

    I hope that Mercedes-Benz is serious about giving up on petrol, I will certainly aspire to own one of the new green machines when they are released...
    Shea, Seattle

    sjjh seattle, wa

    On Mercedes to offer a petroleum-free lineup by 2015 posted 1 year, 5 months ago 8 Responses

  • Global Electrical Grid

    The idea of a global electrical grid sounds very interesting but some questions jump to mind. Considering the amount of interest I have seen for distributed generation I am surprised to see a global grid idea that would appear to be the exact opposite of going small for power and electricity. The transmission losses associated with moving electricity from one side of the planet to the other must be enormous. I would also assume that the heat recuperation that makes distributed generation of electricity so attractive would be lost from a global electrical grid.
    Shea
    Seattle, WA

    sjjh seattle, wa

    On Greenpeace report calls carbon capture and sequestration 'false hope' posted 1 year, 6 months ago 15 Responses

  • Coal and CCS - Volume of CO2

    I wonder if this statement from the bulleted items is correct:
    "Coal has a sulfur content of 1 or 2% and a carbon content of 70 to 80%. CO2 capture and sequestration is therefore 50 times more difficult. Since SO2 scrubbing has often been rejected, one may question the feasibility of large-scale CO2 capture ..."
    I get it that coal has a carbon content of 70-80% but when CO2 is captured and sequestered, in an imagined CO2 capture and sequestration scheme, it isn't just the carbon that is sequestered, it is also the oxygen that the carbon has bonded with, thus the CO2 - can someone with a stronger understanding of science help me understand what volumes are being talked about for sequestration in relationship to the coal burned?  Thank you

    sjjh seattle, wa

    On Always keep the bait dangling just out of reach posted 2 years, 5 months ago 17 Responses