Alcohol dehydrogenation over Pd versus PdAg membranes

作者：Amandusson H; Ekedahl LG; Dannetun H^*

来源：Applied Catalysis A: General , 2001, 217(1-2): 157-164.

DOI：10.1016/S0926-860X(01)00591-9

• methanol
• ethanol
• palladium
• silver
• membrane
• hydrogen

The dehydrogenation of methanol and ethanol and the subsequent permeation of hydrogen through Pd and Pd-70Ag30 membranes, respectively, have been studied. In order to keep a continuous hydrogen permeation rate, oxygen needs to be added to the alcohol supply. Without oxygen, the decomposition products will form a contaminating layer on the upstream membrane surface. The extraction of hydrogen from ethanol is six times more effective through a Pd-70Ag30 membrane than through a pure Pd membrane (at optimum conditions). For methanol, the hydrogen permeation is 30% larger through a Pd-70Ag30 membrane than through a membrane of pure Pd. The increased hydrogen permeation yield through Pd-70Ag30 compared to Pd can be attributed mainly to a lower upstream consumption of hydrogen due to water formation, but also to an increased conversion of the alcohol in the presence of oxygen.

• 出版日期2001-9-3