Liquid Phase Kinetic and Thermodynamic Studies on Promoted Nickel Catalysts used for H/D Exchange
作者:
M. M. Abdel-Badei,
N. Belacy,
A. El-Sharkawy,
F. Abou El-Nour,
期刊:
Isotopenpraxis Isotopes in Environmental and Health Studies
(Taylor Available online 1990)
卷期:
Volume 26,
issue 11
页码: 532-534
ISSN:0021-1915
年代: 1990
DOI:10.1080/10256019008622422
出版商: Taylor & Francis Group
关键词: activation energy;arrhenius equation;catalysts;deuterium;free enthalpy;hydrogen isotopes;isotopic exchange;nickel;reaction kinetics;zirconium oxides
数据来源: Taylor
摘要:
Successful choice of the suitable catalyst composition for hydrogen/deuterium exchange reaction between hydrogen and water requires understanding of chemical kinetics as well as surface properties and activity in both liquid- and vapour phases. The present study deals with the thermodynamic and kinetic behaviour of a simple liquid phase reaction on the surface of nickel catalyst promoted with zirconium oxide used for the H/D exchange. This study helps understand the condensation of water on the catalyst surface during operation which leads to its poisoning. In this specific case water molecules are responsible for selective poisoning of this type of catalysts. The reaction rate constant, the increase in Gibb,s free energy, the enthalpy, the entropy of activation and the energy of activation were calculated.
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