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Article | REF: G1814 V1

CO2 reuse chemically

Authors: Association record, Laurent DUMERGUES

Publication date: September 10, 2024

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2. Upgrading with chemical transformation

There are various chemical pathways for CO 2 valorization. They involve either inserting a CO 2 molecule into a carbon chain (carboxylation) or mineral chain (mineralization), or on the contrary reducing this CO 2 by adding hydrogen, for example. The reduction pathways take various forms, depending on the reactant used and technical specificities: the use of very high temperatures (thermochemistry), electricity (electrolysis), methane (reforming), or hydrogen (hydrogenation)... (see figure  1 ).

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