Recent advances on gas-phase CO2 conversion:
Catalysis design and chemical processes to close the
carbon cycle


Chemical CO2 recycling in the gas phase constitutes a straightforward approach for effective CO2 conversion to added-value products like syngas or synthetic methane. In this scenario, some traditional processes such as the dry and bireforming of methane, the CO2 methanation and the reverse water-gas shift have gained a renewed interest from the CO2 utilisation perspective. Indeed, these reactions represent flexible routes to upgrade CO2 and their application at an industrial scale could substantially reduce CO2 emissions. The bottleneck for the implementation of these processes at the commercial level is the development of highly active and robust heterogeneous catalysts able to overcome CO2 activation and deliver sufficient amounts of the upgrading products (i.e. syngas or synthetic natural gas) at the desired operating conditions. This review paper gathers the most recent advances in the design of new catalytic formulations for chemical CO2 recycling in the gas phase and constitutes an overview for experts and newcomers in the field to get fundamental insights into this emerging branch of low-carbon technologies.

(A) In situ XRD patterns under H2 or inert atmosphere (N2) of the catalysts up to 600 °C or 700 °C. (B) XRD patterns of spent catalysts. Symbols: ♥ MoxC ♣ MoOxCy, ♦ MoO2, x Mo, ♠ Cu, Φ CuO.

Paper information


Current Opinion in Green and Sustainable Chemistry 2022, 36:100647


G. Torres-Sempere
L. Pastor-Perez
J. A. Odriozola
J. Yu
F. J. Duran-Olivencia
L. F. Bobadilla
T. R. Reina



CO2 conversion, Global warming, Catalysis, Reforming, Methanation,
Reverse water-gas shift.