不同助剂对合成甲醇工业催化剂二氧化碳加氢性能的影响

摘要

A series of catalysts for methanol synthesis were prepared by impregnating CeO2,ZrO2,La2O3, MnQ2, Pr2Q3, SrO, V2O5 over a industrial methanol synthesis catalyst(C301). Catalytic properties of modified cata lysts were systemically investigated, using the technologies of X-ray diffraction(XRD). Nitrogen adsorptoin-desorption (BET), hydrogen temperature programmed reduction(H2-TPR), carbon dioxide temperature programmed desorption (CX)2-TPD)and the evaluation of catalytic activity was conducted in a micro fixed-bed reactor. The results show that after the catalyst is modified by CeO2 , ZrO2, La2 O3, MnO2, SrO, V2O5 are promoted the activation of methanol syn thesis by CO2 hydrogenation, especially, the ZrQ2-doped C301 has enthanced CO2 conversion by about 5%, methanol selectivity by about 8%.%采用浸渍法制备了以工业铜基催化剂C301为基体,含CeO2、ZrO2、La2O3、MnO2、Pr2O3、SrO、V2O5助剂的一系列催化剂,在微型固定床反应器上考察了其对CO2加氢合成甲醇的催化性能及影响,并采用XRD、BET、H2-TPR和CO2-TPD等手段进行了表征.研究结果表明,除助剂Pr2O3外,CeO2、ZrO2、La2O3、MnO2、SrO、v2O5助剂的加入均促进了C301催化剂的CO2加氢合成甲醇活性,其中ZrO2的加入使CO2转化率提高了近5％,甲醇收率提高了近8％.