Re: Methanol production from atmospheric CO2


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On May 7, 3:00 am, "Romeo Gigli" <rgigli @ (no-spam) libero.it> wrote:
Is there a chance to produce liquid fuels (for example, methanol or
dymethil
ether) useful for private transportation from natural (and potentially
very
dangerous...) CO2, using low temperature waste heat (and if necessary
electricity/hydrogen) from "clean" energy sources (geothermal, solar, wind
or even nuclear) ? I'm very curious, which are in particular the
temperatures and energies needed?
....
Certainly, the economics of the process are all to be seen

There are several methods: In Germany about 15 years ago the 'ZSW'
'zentrum fur sonnen-energie und wasserstoff'
extractracted C02 from the atmosphere, reacted it with copper-zinc
catalysts at 200 atm with electrolytically obtained hydrogen gas to
produce methanol.
....

Thanks very much, very interesting. My own curiosity is if there is a
process which needs, rather than electricity, only (or almost only that)
low-medium temperature heat from a
"clean" source, I thought for example geothermal or high temperature thorium
breeders - and how much heat in that case it would need. For a 38%
electricity to chemical energy efficiency if we choice to use a only thermal
process it needs about 13 kWh thermal per liter of MeOH, not so difficult to
achieve if only low temp heat is needed



.

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