陈化时间对CuO/ZnO/CeO_2/ZrO_2甲醇水蒸气重整制氢催化剂性能的影响(英文)  

Effects of precipitation aging time onthe performance of CuO/ZnO/CeO_2-ZrO_2 for methanol steam reforming

作　　者：张磊[1,2,3] 潘立卫[3] 倪长军[3] 孙天军[3] 王树东[3] 胡永康[1] 王安杰[1] 赵生生[3] 

机构地区：[1]大连理工大学精细化工国家重点实验室,辽宁大连116024 [2]辽宁石油化工大学化学化工与环境学部,辽宁抚顺113001 [3]中国科学院大连化学物理研究所,辽宁大连116023

出　　处：《燃料化学学报》2013年第7期883-888,共6页Journal of Fuel Chemistry and Technology

基　　金：National Natural Science Foundation of China(21076206);Natural Basic Research Program of China(973 Program,2010CB732302);National High Technology Research and Development Program(863 Program,2011AA050706)

摘　　要：采用共沉淀法制备了CuO/ZnO/CeO2/ZrO2甲醇水蒸气重整催化剂,探讨了陈化时间对催化剂性能的影响。结果发现,延长陈化时间能增加催化剂的表面铜原子数和改善催化剂的还原性能,但与此同时也降低了催化剂的储放氧性能。延长陈化时间,CuO/ZnO/CeO2/ZrO2催化剂的氢产率随表面铜原子数的增加而成线性增长。另一方面,重整尾气中的CO含量也随着储放氧能力的下降而增加。综合考虑产氢率和重整尾气中CO含量,最佳陈化时间为2h,此时,CuO/ZnO/CeO2/ZrO2催化剂表现出了最佳性能。CuO/ZnO/CeO2-ZrO2 catalysts for methanol steam reforming（MSR） were prepared by a co-precipitation procedure,and the effects of precipitation aging time on the catalytic performance were investigated.It was found that the prolonged precipitation aging time increased the surface Cu atoms and improved the reducibility of catalyst,but decreased the oxygen storage capacity.A nearly linear increase between the surface Cu atoms and H2 production rate was obtained in prepared CuO/ZnO/CeO2-ZrO2 catalysts with prolonged precipitation aging time.However,CO concentration increased with the decrease of the oxygen storage capacity.Considering the H2 production rate and CO level,the optimal precipitation aging time was 2 h.CuO/ZnO/CeO2-ZrO2 prepared using this aging time exhibited the best activity with suppressed CO formation.

关 键 词：甲醇水蒸气重整 老化时间 H2 CUO ZnO CEO2-ZRO2 CO含量 

分 类 号：O643[理学—物理化学]