论文信息 - Surface reaction of hydrogen on a palladium alloy membrane under co-existence of H2O, CO, CO2 or CH4☆

Surface reaction of hydrogen on a palladium alloy membrane under co-existence of H2O, CO, CO2 or CH4☆

Abstract 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.

[1] Yoshinori Shirasaki,et al. The effect of co-existing gases from the process of steam reforming reaction on hydrogen permeability of palladium alloy membrane at high temperatures , 2007 .

[2] Weiqiang Liang,et al. The effect of carbon monoxide and steam on the hydrogen permeability of a Pd/stainless steel membrane , 2000 .

[3] F. L. Chen,et al. Hydrogen permeation through palladium-based alloy membranes in mixtures of 10% methane and ethylene in the hydrogen , 1996 .

[4] Katsuki Kusakabe,et al. Effects of co-existing hydrocarbons on hydrogen permeation through a palladium membrane , 2000 .

[5] C. Nishimura,et al. Effects of High Concentration CO and CO 2 on Hydrogen Permeation through the Palladium Membrane , 1990 .

[6] S. Konishi,et al. Effects of impurities on hydrogen permeability through palladium alloy membranes at comparatively high pressures and temperatures , 1983 .

[7] F. L. Chen,et al. Effect of carbon monoxide on hydrogen permeation in some palladium-based alloy membranes , 1996 .

[8] H. Nakajima,et al. Development of membrane reformer system for highly efficient hydrogen production from natural gas , 2009 .

[9] Hengyong Xu,et al. Experimental and simulation studies on concentration polarization in H2 enrichment by highly permeable and selective Pd membranes , 2006 .