CO2 methanation over Ni/ZSM-5 catalysts: The effects of support morphology and La2O3 modification

被引：37

作者：

Cui, Yan ^{[1
]}

Qiu, Jian ^{[3
]}

Chen, Bin ^{[3
]}

Xu, Leilei ^{[1
]}

Chen, Mindong ^{[1
]}

Wu, Cai-e ^{[2
]}

Cheng, Ge ^{[1
]}

Yang, Bo ^{[1
]}

Wang, Ning ^{[4
]}

Hu, Xun ^{[5
]}

机构：

[1] Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Atmospher Environm & Equipm, Sch Environm Sci & Engn, Jiangsu Key Lab Atmospher Environm Monitoring & Po, Nanjing 210044, Peoples R China

[2] Nanjing Forestry Univ, Coll Light Ind & Food Engn, Nanjing 210037, Peoples R China

[3] Jiangsu ShuangLiang Environm Technol Co Ltd, Jiangyin 214400, Peoples R China

[4] Beijing Univ Technol, Fac Environm & Life, Beijing 100124, Peoples R China

[5] Univ Jinan, Sch Mat Sci & Engn, Jinan 250022, Peoples R China

来源：

FUEL | 2022年 / 324卷

基金：

中国国家自然科学基金;

关键词：

Ni/ZSM-5; catalysts; Morphology effect; La2O3; modification; Short b-axis ZSM-5 zeolite; CO2; methanation; CARBON-DIOXIDE METHANATION; NICKEL-BASED CATALYSTS; LOW-TEMPERATURE; OXYGEN VACANCIES; ZSM-5; METAL; HYDROGENATION; HYDROCARBONS; PERFORMANCE; FABRICATION;

D O I：

10.1016/j.fuel.2022.124679

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

A series of Ni-based catalysts supported on the ZSM-5 with different morphologies were facilely synthesized and employed as the CO2 methanation catalysts. The achieved catalysts were systematically characterized by various techniques. Besides, the in-situ DRIFTS was also performed to investigate the intermediates of the CO2 methanation reaction process. It was found that the catalyst with the short b-axis ZSM-5 support displayed much higher activity than other counterparts supported on nano ZSM-5 and commercial ZSM-5. The possible reason for this could be attributed to the unique morphology of short b-axis ZSM-5 zeolite with large external surface area (489.7 m(2)/g). In addition, it was also found the La doped catalyst displayed much higher low-temperature activity (200-300 C) and CH4 selectivity than the pristine counterpart without modification. Resultantly, the catalyst with both the short b-axis ZSM-5 support and La2O3 modification displayed the optimum catalytic performance. Therefore, the morphology of the support and the selection of modifier were considered as the important concerns when designing and synthesizing Ni based CO2 methanation catalysts with highly-developed performances.

引用

页数：17

共 82 条

[1] Catalytic Performance of γ-Al2O3-ZrO2-TiO2-CeO2 Composite Oxide Supported Ni-Based Catalysts for CO2 Methanation [J].