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

This article discusses the decomposition of methane in the temperature range 550-800 degrees C on low-percentage monometallic (Ni/gamma-Al2O3, Co/gamma-Al2O3) and bimetallic (Ni-Co/gamma-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 degrees C, the highest methane conversion is 81%, and the highest hydrogen yield of 51% is formed on Ni-Co/gamma-Al2O3. A complex of physicochemical methods (Scanning Electron Microscope (SEM), X-ray Diffraction (XRD), Temperature Programmed Reduction (TPR-H-2), etc.) established that the addition of cobalt oxide to the composition of Ni/gamma-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 (C) 2021 by Authors, Published by BCREC Group.

Automated summary

This article discusses the decomposition of methane on monometallic and bimetallic catalysts in a certain temperature range. The results show that the bimetallic catalyst is more active in the methane decomposition to hydrogen. Various physicochemical methods were used to explain the enhanced catalytic activity of the bimetallic catalyst.