Surface reaction of hydrogen on a palladium alloy membrane under co-existence of H2OH2O, CO, CO2CO2 or CH4CH4☆
| Autor: | Kazuhisa Sato, Yoshinori Shirasaki, Takanori Otake, Isamu Yasuda, Tatsuya Kawada, Atsushi Kaimai, Tatsuya Tsuneki, Atsushi Unemoto, Keiji Yashiro, Junichiro Mizusaki |
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| Rok vydání: | 2007 |
| Předmět: |
Hydrogen
Renewable Energy Sustainability and the Environment Cryo-adsorption Slush hydrogen Inorganic chemistry Energy Engineering and Power Technology chemistry.chemical_element Rate equation Partial pressure Condensed Matter Physics Methane chemistry.chemical_compound Fuel Technology Reaction rate constant chemistry Carbon monoxide |
| Zdroj: | International Journal of Hydrogen Energy. 32:4023-4029 |
| ISSN: | 0360-3199 |
| Popis: | Hydrogen permeation measurements were carried out to investigate how a co-existing gas with hydrogen affects the hydrogen permeability of a silver 23 wt%–palladium alloy of 20 μ m in thickness. The hydrogen flux was reduced by the co-introduction of water vapor, carbon dioxide, carbon monoxide or methane. The lower the temperatures at which the measurements were carried out, the more obvious were the reductions of the hydrogen fluxes. An empirical rate equation of the surface reaction was obtained by a precise analysis of the results of hydrogen permeation measurements. The rate constant was found to depend on temperature, partial pressure and the components of the co-existing gas. Performance simulation was carried out utilizing the obtained rate equation of the surface reaction. It suggests that an interference effect of the co-existing gas is negligible at temperatures above 873 K for the membranes thicker than 10 μ m at 873 K. |
| Databáze: | OpenAIRE |
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