草酸二甲酯加氢制乙二醇Cu/SiO_2催化剂失活研究  

Deactivation of Cu/SiO_2 catalyst for hydrogenation of dimethyl oxalate to ethylene glycol

作　　者：康文国[1] 李伟[1] 肖文德[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

出　　处：《工业催化》2009年第6期70-74,共5页Industrial Catalysis

摘　　要：采用沉淀沉积法制备了草酸二甲酯制乙二醇Cu/SiO_2催化剂。在反应温度210℃、压力2.0 MPa、空速0.01 mol·(g·h)^(-1)和氢酯物质的量比60的条件下,对催化剂的失活规律进行了研究,采用XRD、BET和TG-DTG等手段对反应前、后的催化剂进行表征,结果表明,铜烧结和高聚物可能是导致催化活性降低的主要原因。Cu/SiO_2 catalyst for hydrogenation of dimethyl oxalate (DMO) to ethylene glycol was prepared by homogeneous deposition-precipitation.Deactivation of the Cu/SiO_2 catalyst was studied under the fol- lowing condition:210 ℃,2.0 MPa,DMO LHSV of 0.01 mol·(g-cat· h)^(-1),n(H_2):n(DMO) =60. Fresh and deactivated catalysts were characterized by XRD,BET and TG-DTG.The results showed that deactivation of the Cu/SiO_2 catalyst was mainly caused by growth of Cu crystals by sintering and coke formation from the polymers.

关 键 词：催化化学 酯加氢 铜催化剂 失活 乙二醇 

分 类 号：O643.36[理学—物理化学] TQ223.16+2[理学—化学]