硫化态NiMoK／Al_2O_3变换催化剂对水的吸附性能

Water Adsotption on Sulfidized WGS Catalyst NiMoK/Al_2O_3

硫化态ＮｉＭｏＫ／Ａｌ＿２Ｏ＿３变换催化剂对水的吸附性能李利民，郭益群，王贵昌，王文祥（郑州大学化学系郑州４５００５２）关键词水煤气变换催化剂，硫化，水吸附，脉冲气相色谱ＣＯ（Ｎｉ）ＭｏＫ／Ａｌ＿２Ｏ＿３型催化剂用于变换反应时需首先进行硫化，硫化温度...

The adsorption on sulfidized WGS(water gas shift) catalyst NiMoK/Al_2O_3 hasbeen studied by pulse gas chromatography.The changes of entropy and enthalpy of H_2O ad-sorption were obtained from the retention volume determined at various temperatures. Theresults show that the △H_a and △S_a on sulfidized catalyst were greater than that of the oxi-dized catalyst. Furthermore,△H_a and △S_a of catalyst increase with the sulfidation tempera-ture. It is thought that the higher the sulfidation temperature, the more the adsorption sitesof H_2O on the surface of catalyst, and the weaker the adsorbability.