Research Progress and Reaction Mechanism of CO2 Methanation over Ni-Based Catalysts at Low Temperature: A Review

Catalysts

Wenqing Zeng¹  Li Li²  Guiying Li²  Changwei Hu²  Mouxiao Song²  Xueshuang Wu² 

[1]College of Chemical Engineering, Sichuan University, Chengdu 610064, China

[2]Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China

关键词: CO₂;    CH₄;    reaction mechanism;    Ni-based catalysts;    low temperature;   

DOI  :  10.3390/catal12020244

来源: DOAJ

【 摘 要 】

The combustion of fossil fuels has led to a large amount of carbon dioxide emissions and increased greenhouse effect. Methanation of carbon dioxide can not only mitigate the greenhouse effect, but also utilize the hydrogen generated by renewable electricity such as wind, solar, tidal energy, and others, which could ameliorate the energy crisis to some extent. Highly efficient catalysts and processes are important to make CO₂ methanation practical. Although noble metal catalysts exhibit higher catalytic activity and CH₄ selectivity at low temperature, their large-scale industrial applications are limited by the high costs. Ni-based catalysts have attracted extensive attention due to their high activity, low cost, and abundance. At the same time, it is of great importance to study the mechanism of CO₂ methanation on Ni-based catalysts in designing high-activity and stability catalysts. Herein, the present review focused on the recent progress of CO₂ methanation and the key parameters of catalysts including the essential nature of nickel active sites, supports, promoters, and preparation methods, and elucidated the reaction mechanism on Ni-based catalysts. The design and preparation of catalysts with high activity and stability at low temperature as well as the investigation of the reaction mechanism are important areas that deserve further study.

【 授权许可】

Unknown