Catalytic Decomposition of Methane to Hydrogen over Al2O3Supported Mono- and Bimetallic Catalysts


Yergaziyeva G. Makayeva N. Shaimerden Z. Soloviev S. Telbayeva M. Akkazin E. Ahmetova F.
2022Diponegoro University

Bulletin of Chemical Reaction Engineering and Catalysis
2022#17Issue 11 - 12 pp.

This article discusses the decomposition of methane in the temperature range 550-800°C on low-percentage monometallic (Ni/γ-Al2O3, Co/γ-Al2O3) and bimetallic (Ni-Co/γ-Al2O3) catalysts. It is shown that the bimetallic cata-lyst is more active in the decomposition of methane to hydrogen than monometallic ones. At a reaction tempera-ture of 600°C, the highest methane conversion is 81%, and the highest hydrogen yield of 51% is formed on Ni-Co/γ-Al2O3. A complex of physicochemical methods (Scanning Electron Microscope (SEM), X-ray Diffraction (XRD), Temperature Programmed Reduction (TPR-H2), etc.) established that the addition of cobalt oxide to the composi-tion of Ni/γ-Al2O3leads to the formation of surface bimetallic Ni-Co alloys, while the dispersion of particles increas-es and the reducibility of the catalyst is facilitated, which provides an increase in the concentration of metal parti-cles - active centers, which can be the reason for an increase in the catalytic properties of a bimetallic catalyst in comparison with monometallic ones.

Al2O3catalyst , bimetallic catalyst , Co/γ-Al2O3 , hydrogen , methane decomposition , Ni-Co/γ-Al2O3 , Ni/γ-Al2O3

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Institute of Combustion Problems, Bogenbay batyra 172 A, Almaty, 050012, Kazakhstan
Al-Farabi Kazakh National University, al- Farabi ave. 71, Almaty, 050040, Kazakhstan
L.V. Pysarzhevskii Institute of Physical Chemistry, National Academy of Sciences of Ukraine, Prospekt Nauki, 31, 03028, Ukraine

Institute of Combustion Problems
Al-Farabi Kazakh National University
L.V. Pysarzhevskii Institute of Physical Chemistry

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