Catalytic activity of Ni/SSZ-13 catalyst for CO2 methanation

被引：0
|
作者：
Zhang J.-C. [1 ]
Yang Y.-J. [1 ]
Liu J. [1 ]
Hua Z.-X. [1 ]
机构：
[1] State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan
来源：
Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology | 2021年 / 49卷 / 07期
关键词：
Carbon dioxide; Catalyst; Catalytic activity; Methanation; Ni/SSZ-13;
D O I：
10.19906/j.cnki.JFCT.2021041
中图分类号：
学科分类号：
摘要：
Ni/SSZ-13 catalyst was prepared by the impregnation method and used to catalyze CO2 methanation in a fixed-bed reactor. The microstructure and physical-chemical properties of catalyst were characterized by N2 physical adsorption, X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The results show that Ni/SSZ-13 catalyst initiates catalytic activity towards CO2 methanation at 250 ℃. Ni/SSZ-13 catalyst shows the optimal performance for CO2 methanation at 450 ℃. CO2 conversion rate and CH4 selectivity are 70% and 95%, respectively. SSZ-13 support shows a cuboid structure. Moreover, SSZ-13 support mainly possesses microporous and contains some mesopores, which provide larger surface area for nickel species dispersion. During the reduction process of the calcined catalyst at 500 ℃, NiO is reduced by H2 into metal Ni, which is the main active component for CO2 methanation. © 2021, Science Press. All right reserved.
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页码：960 / 966
页数：6
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