Recent progress in anti-coking Ni catalysts for thermo-catalytic conversion of greenhouse gases

As global warming has become a major environmental problem, how to effectively reduce or rationally utilize greenhouse gases has become an important topic. This review summarizes the latest development of Ni-based catalysts for thermal-catalytic conversion of CO2 and CH4, including steam reforming of methane, partial oxidation of methane, methane decomposition, dry reforming of methane, reverse water gas shift reaction and CO2 hydrogenation. The modification strategies are illustrated in depth, such as size and dispersion control, surface modification, oxygen defects. Besides, the reaction and coking mechanisms for various processes are introduced, and the effects of reaction conditions and reactor designs are discussed and illustrated. This is the first comprehensive review on discussing the latest developments of anti-coking Ni-based catalysts for six commonly studied thermal-catalytic processes where two greenhouse gases (CH4 and CO2) are involved. To further improve the catalytic performances and energy efficiency, advanced techniques such as plasma and microwave can be integrated and in-situ characterizations are expected to explore the deactivation mechanisms in depth. Moreover, a smart design of the catalyst is necessary to inhibit the side reactions by changing the reaction pathways. (c) 2021 Published by Elsevier B.V. on behalf of Institution of Chemical Engineers.

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This review summarizes the latest developments of Ni-based catalysts for thermal-catalytic conversion of CO2 and CH4, covering various catalytic processes, modification strategies, reaction mechanisms, and the effects of reaction conditions on catalyst performance. Advanced techniques such as plasma and microwave integration are suggested to improve catalytic performance and energy efficiency.