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《工程(英文)》 >> 2022年 第14卷 第7期 doi: 10.1016/j.eng.2021.08.023

用于CO甲烷化的Ni/CeO2催化剂还原过程重构行为调控研究

a State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

Operando Molecular Spectroscopy and Catalysis Research Laboratory, Department of Chemical and Biomolecular Engineering, Lehigh University, Bethlehem, PA 18015, USA

Department of Instrument Science and Engineering and School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Dalian Research Institute of Petroleum and Petrochemicals, SINOPEC, Dalian 116045, China

收稿日期: 2021-01-19 00:00:00 修回日期: 2021-04-30 00:00:00 录用日期: 2021-08-17 00:00:00 发布日期: 2021-12-08

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摘要

还原预处理是活化负载型金属催化剂的重要步骤,但很少受到关注。本研究发现负载型镍催化剂的重构过程对预处理条件非常敏感。与使用氢气的传统活化方式相比,用合成气活化催化剂可以产生具有多晶结构的负载型镍纳米颗粒,其中包含丰富的晶界。独特的活化方式使得催化剂上CO吸附得到增强,提高了CO甲烷化率。通过操纵活化条件来调整催化剂结构的策略也可以被用于指导其他负载型金属催化剂的理性设计。

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