草酸二甲酯加氢制乙二醇Cu/SiO_2催化剂失活机理的研究  

Study on deactivation mechanism of Cu/SiO_2 catalyst for hydrogenation of dimethyl oxalate to ethylene glycol

作　　者：张博[1] 张素华[1] 惠胜国[1] 计扬 李伟[1] 房鼎业[1] 

机构地区：[1]华东理工大学化学工程国家重点实验室,上海200237 [2]上海浦景化工技术有限公司,上海200231

出　　处：《天然气化工—C1化学与化工》2012年第4期1-6,共6页Natural Gas Chemical Industry

摘　　要：通过快速老化实验研究了草酸二甲酯加氢制乙二醇Cu/SiO2催化剂的失活。采用XRD、低温N2吸附、TEM及TG对失活前后催化剂进行了表征,发现催化剂失活原因为热烧结、积炭及活性组分铜的价态变化。还研究了各种失活原因之间的内在联系,并提出了较为合理的失活机理。The deactivation mechanism of Cu/SiO2 catalysts for hydrogenation of dimethyl oxalate （DMO） was investigated by a well-designed rapid aging treatment experiment. The structure and texture of working and deactivated catalysts were characterized by XRD, NE-physisorption, TEM, and TG. Based on the characterization results, the deactivation was attributed to a number of factors like sintering, carbonaceous deposits, and valence transition of copper species. The intrinsic relations between catalysts deactivation and sintering, carbonaceous deposits, and valence transition were discussed, and a deactivation mechanism of Cu/SiO2 catalysts was proposed.

关 键 词：CU SIO2催化剂 失活机理 草酸二甲酯 加氢 乙二醇 

分 类 号：O643.36[理学—物理化学] TQ223.162[理学—化学]