Plasma-catalytic CO2 methanation over NiFen/(Mg, Al)Ox catalysts: Catalyst development and process optimisation

Yao Zhang, Boji Wang, Zhaoqi Ji, Yilai Jiao, Yan Shao, Huanhao Chen, Xiaolei Fan

Research output: Journal PublicationArticlepeer-review


Plasma-assisted catalytic carbon dioxide (CO2) methanation is a promising approach to valorise CO2 under mild conditions, and the system requires rational design regarding both catalysts and processes to advance it towards practical applications. Herein, the bimetallic NiFen/(Mg, Al)Ox catalysts were developed for plasma-catalytic CO2 methanation, and the effect of atomic ratio of Ni and Fe and reduction temperature on the catalysts was investigated systematically. The findings show that a higher reduction temperature was beneficial to the formation of Ni3Fe alloy and abundant surface oxygen vacancies, and increased CO2 adsorption ability. As a result, the NiFe0.1/(Mg, Al)Ox-800 catalyst led to a good catalytic performance in the plasma-assisted catalysis with about 84.7% CO2 conversion and 100% methane (CH4) selectivity. In addition, this study also employed response surface methodology (RSM) to explore the optimisation of plasma-catalytic CO2 methanation for the first time. Results from RSM show that in the plasma-catalytic system the selective CO2 hydrogenation to CH4 was favoured by higher applied voltage, lower gas flow rate and higher gas ratio (H2: CO2).

Original languageEnglish
Article number142855
JournalChemical Engineering Journal
Publication statusPublished - 1 Jun 2023
Externally publishedYes


  • CO methanation
  • NiFe(Mg, Al)O catalyst
  • Plasma catalysis
  • Reduction temperature
  • response surface methodology (RSM)

ASJC Scopus subject areas

  • Chemistry (all)
  • Environmental Chemistry
  • Chemical Engineering (all)
  • Industrial and Manufacturing Engineering


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