In reply to Michel Jullian's message of Wed, 14 Feb 2007 14:03:05 +0100: Hi, [snip] >Sure Fred I am not ignoring this wonderful emission lowering scheme, but we >also need a solution to recapture what's already been dumped into the >atmosphere, that's the challenge. However I have no doubt some inspiration can >be gotten from this scheme, e.g. bubbling to increase CO2 dissolution. >Spraying the phytoplancton laden seawater could achieve the same result maybe? > >Michel [snip] There are really only a few forms in which carbon can be sequestered. As organic compounds, or as pure carbon, or as carbonates.
Carbonates can only displace silicates without messing up the environment. Removing all the CO2 would then mean that we would need to produce a great deal of silicon, from silicates, not from SiO2 (the anions in the silicates are needed to combine with the CO2 to form carbonates). Solar cells as a use for the Silicon perhaps? Pure carbon in the form of Fullerenes, graphene and carbon tube nano-tech is a possibility, though this would probably only consume a small quantity. That leaves organic compounds, i.e. create petroleum/coal and store it underground...and lo and behold we have reached the same point our predecessors did a 100000 years ago (long enough to have left no records ;) Regards, Robin van Spaandonk http://users.bigpond.net.au/rvanspaa/ Competition provides the motivation, Cooperation provides the means.
