Open Access

ABSTRACT

Comparative Study on Dry Reforming of Methane Over Co-M (M=Ce, Fe, Zr) Catalysts Supported on N-Doped Activated Carbon

by Yinghui Sun, Guojie Zhang

1 Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan, 030024, China.
2 College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.

* Corresponding Author: Guojie Zhang. Email: .

The International Conference on Computational & Experimental Engineering and Sciences 2019, 22(1), 105-105. https://doi.org/10.32604/icces.2019.05173

Abstract

A series of Co-M (M = Ce, Fe, Zr) binary oxides supported on N-doped catalysts were prepared by impregnation methods and tested for DRM reaction. Moreover, the influence of Co and Ce atomic contents in the catalysts on DRM performance was investigated. Significant enhancement of activity performance over Ce promoted 3Co-1Ce/AC-N catalyst was observed. Compared with Fe and Zr, the catalyst with 1/4 mol% of Ce showed the highest activity and was higher than the supported Co catalyst. The calcined and spent catalysts were characterized by XPS, H₂-TPR, TEM and EDX mapping studies. The characterization results demonstrated that the improved DRM reaction activity of the 3Co-1Ce/AC-N was attributed to the presence of Ce in Co-based catalyst, which modified the chemical states of Co-Ce composite oxide and redox properties, increased the presence of Co²⁺ species, the content of chemisorbed oxygen, and the oxygen mobility. Among the different Co/Ce ratio catalysts, the one with a Co/Ce molar ratio at 1 displayed much better catalytic performance. The adding of higher Ce loading decreased the content of chemisorbed oxygen on the catalyst surface, declining the oxidation rate of CH₄. In addition, the introduction of N on support could also influence the catalyst reduction property and interaction of Co-Ce bimetal, which would improve catalytic performance.

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Keywords

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