Citation: Xiaoshan Zhang, Ning Rui, Xinyu Jia, Xue Hu, Chang-jun Liu. Effect of decomposition of catalyst precursor on Ni/CeO₂ activity for CO methanation[J]. Chinese Journal of Catalysis, ;2019, 40(4): 495-503. doi: S1872-2067(19)63289-4 shu

Effect of decomposition of catalyst precursor on Ni/CeO₂ activity for CO methanation

Collaborative Innovation Center of Chemical Science and Engineering(Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

Received Date: 20 October 2018
Revised Date: 25 December 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (21476157, 21536008 and 21621004), and the National Key R&D Program of China (2016YFB0600902).

CO methanation on Ni/CeO₂ has recently received increasing attention. However, the low-temperature activity and carbon resistance of Ni/CeO₂ still need to be improved. In this study, plasma decomposition of nickel nitrate was performed at ca. 150℃ and atmospheric pressure. This was followed by hydrogen reduction at 500℃ in the absence of plasma, and a highly dispersed Ni/CeO₂ catalyst was obtained with improved CO adsorption and enhanced metal-support interaction. The plasma-decomposed catalyst showed significantly improved low-temperature activity with high methane selectivity (up to 100%) and enhanced carbon resistance for CO methanation. For example, at 250℃, the plasma-decomposed catalyst showed a CO conversion of 96.8% with high methane selectivity (almost 100%), whereas the CO conversion was only 14.7% for a thermally decomposed catalyst.
- Nickel,
- CeO₂,
- Carbon monoxide,
- Syngas,
- Methanation,
- Plasma
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沈阳化工大学材料科学与工程学院沈阳 110142

Effect of decomposition of catalyst precursor on Ni/CeO2 activity for CO methanation

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Effect of decomposition of catalyst precursor on Ni/CeO₂ activity for CO methanation