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Net reduction of CO2 via its thermocatalytic and electrocatalytic transformation reactions in standard and hybrid processes
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Net reduction of CO2 via its thermocatalytic and electrocatalytic transformation reactions in standard and hybrid processes
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Journal Article
Net reduction of CO2 via its thermocatalytic and electrocatalytic transformation reactions in standard and hybrid processes
2019
Overview
Many research efforts into CO
2
reduction to valuable products are motivated by a desire to reduce the atmospheric CO
2
concentration. However, it is unclear how laboratory-scale catalytic performance translates to the goal of reducing CO
2
. In this Perspective, we analyse recently reported thermocatalytic and electrocatalytic performances for reduction of CO
2
to methanol in terms of net CO
2
reduction, on a mole basis. Our calculations indicate that even an ideal catalytic process needs to be powered by electricity emitting less than 0.2 kg of CO
2
per kWh to achieve a net reduction in CO
2
. We conclude that hybrid processes combining thermocatalysis and electrocatalysis are promising opportunities to reduce CO
2
to methanol, as long as practical electrocatalysts achieve reaction rates two orders of magnitude larger than those observed in current laboratory tests. In such a scenario, an increase in the global methanol market could benefit the overall reduction of atmospheric CO
2
via conversion of CO
2
to methanol.
CO
2
hydrogenation is frequently acclaimed as a strategy for greenhouse gases mitigation, although the carbon footprint of the corresponding electrocatalytic or thermocatalytic process is often neglected. This Perspective analyses the amount of CO
2
generated during methanol production for different catalytic processes and hybrid thereof.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Springer Nature
Subject
