Removal of atmospheric CO2

Figured this might warrant its own thread as there are numerous approaches under consideration ....some looking promising to scale up. If the output from the process is a useful industrial material ( ie carbon nanotubes ) or can be efficiently converted to a hydro-carbon fuel then we have the beginning of a sustainable process while slowing the rise in CO2 emissions.

As to going negative ( taking CO2 back to pre-industrial ) .....that may be a reach and have its own set of negative outcomes.

Quote:

ABSTRACT Conversion of carbon dioxide to carbon monoxide and other value-added carbon products is an important challenge for clean energy research. Here, we report modular optimization of covalent organic frameworks (COFs), in which the building units are cobalt porphyrin catalysts linked by organic struts through imine bonds, to prepare a catalytic material for aqueous electrochemical reduction of CO2 to CO. The catalysts exhibit high Faradaic efficiency (90%) and turnover numbers (up to 290,000 with initial turnover frequency 9400 hours−1) at pH 7 with an overpotential of –0.55 V, equivalent to a 60-fold improvement in activity compared to the molecular cobalt complex, with no degradation over 24 hours. X-ray absorption data reveal the influence of the COF environment on the electronic structure of the catalytic cobalt centers. Read more at: http://ift.tt/1E8e3KW

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