Catalytic Decomposition of Methane to Hydrogen over Al2O3 Supported Mono- and Bimetallic Catalysts

Bulletin of Chemical Reaction Engineering & Catalysis

Nursaya Makayeva¹  Еrzhan Akkazin¹  Fariza Ahmetova¹  Zhanna Shaimerden¹  Мoldir Telbayeva²  Gaukhar E. Ergazieva²  Sergiy O. Soloviev³ 

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

关键词: methane decomposition;    al2o3 catalyst;    hydrogen;    bimetallic catalyst;    ni/g-al2o3;    co/g-al2o3;    ni-co/g-al2o3;   

DOI  :  10.9767/bcrec.17.1.12174.1-12

来源: DOAJ

【 摘 要 】

This article discusses the decomposition of methane in the temperature range 550–800 °C on low-percentage   monometallic (Ni/g-Al2O3, Co/g-Al2O3) and bimetallic (Ni-Co/g-Al2O3) catalysts. It is shown that the bimetallic catalyst is more active in the decomposition of methane to hydrogen than monometallic ones. At a reaction temperature of 600 °C, the highest methane conversion is 81%, and the highest hydrogen yield of 51% is formed on Ni-Co/g-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 composition of Ni/g-Al2O3 leads to the formation of surface bimetallic Ni-Co alloys, while the dispersion of particles increases and the reducibility of the catalyst is facilitated, which provides an increase in the concentration of metal particles - active centers, which can be the reason for an increase in the catalytic properties of a bimetallic catalyst in comparison with monometallic ones. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License  (https://creativecommons.org/licenses/by-sa/4.0).

【 授权许可】

Unknown