Development of hydrogen production process from dimethyl ether over Pd alloy catalysts

采用钯基催化剂对二甲醚蒸汽重整制氢进行了研究。Al_2O_3共沉淀法制备的PdZn合金在蒸汽重整反应中表现出较高的催化活性、选择性和稳定性。用PdZn合金催化剂对重整气中的一氧化碳进行了选择性氧化脱除。添加Cs和Rb等碱金属化合物可显著提高PdZn合金催化剂的活性。这些添加剂对CO氧化有促进作用，但对H_2氧化有抑制作用。

Hydrogen production by steam reforming of dimethyl ether was investigated with Pd-based catalysts. PdZn alloy prepared by co-precipitation method mixed with Al_2O_3 exhibits high catalytic activity, selectivity and stability for the steam reforming reaction. Removal of carbon monoxide in the reformed gas by selective oxidation was also examined with PdZn alloy catalyst. The activity of the PdZn alloy catalyst can be significantly improved by the addition of alkali metal compounds, such as Cs and Rb. These additives were shown to enhance the CO oxidation but suppress the undesired H_2 oxidation.