铜-稀土-铝催化剂在顺酐加氢制γ-丁内酯反应中的性能研究  

Study on performance of Cu-rare-earth-aluminum composite oxides catalysts in maleic anhydride hydrogenation to γ-butyrolactone reaction

作　　者：林承顺 LIN Chengshun(SINOPEC Nanjing Research Institute of Chemical Industry Co., Ltd., Nanjing 210048, China)

机构地区：[1]中石化南京化工研究院有限公司,江苏南京210048

出　　处：《能源化工》2019年第1期6-11,共6页Energy Chemical Industry

摘　　要：采用沉淀-水热法制备了5种铜-稀土-铝催化剂(CLA、CCA、CHA、CDA、CYA),并用于顺酐常压气相加氢制γ-丁内酯反应。采用XRD、H_2-TPR、TGA和NH_3-TPD表征分析了催化剂的"构效关系",结果表明:还原态催化剂中较高的Cu比表面积和较低的表面酸性位数量对提高催化剂催化性能和稳定性有利。在固定床反应器中考察了催化剂的稳定性,结果表明:当反应温度为220℃,原料空速为1.0 h^(-1)时,催化剂的性能由好到差的顺序依次为CLA、CCA、CHA、CDA、CYA;当反应温度220℃,原料空速为0.2 h^(-1)时,催化剂的稳定性由好到差依次为CLA、CCA、CDA、CHA、CYA。在考察的铜-稀土-铝催化剂中,CLA催化剂的催化性能较好,反应20 h后顺酐转化率及γ-丁内酯选择性仍可达到100%。The Cu-rare-earth-aluminum composite oxides catalysts(CLA,CCA,CHA,CDA,CYA) are prepared by precipitation-hydrothermal method and used in maleic anhydride(MA) gas-phase hydrogenation to γ-butyrolactone(GBL) reaction at atmosphere pressure. The structure-performance relationship is studied by XRD, H2-TPR, TGA and NH3-TPD characterizaton techniques,and the results show that the higher specific surface area of copper and the lower surface acidity number in the reduced catalyst are beneficial to improve the catalytic performance and stability of the catalyst. The stability of the catalyst is investigated in a fixed-bed reactor. The results show that the order from good to bad of catalytic performance is CLA, CCA, CHA, CDA and CYA when the reaction temperature is 220 ℃ and the space velocity of the raw material is 1.0 h-1. The order from good to bad of stability of the catalyst is CLA, CCA, CDA, CHA and CYA when the reaction temperature is 220 ℃ and the space velocity of the raw material is 0.2 h-1. Among the Cu-rare-earth-aluminum composite oxides catalysts investigated, CLA catalyst has better catalytic performance. After 20 hours of reaction, the conversion of maleic anhydride and the selectivity of gamma-butyrolactone can still reach 100%.

关 键 词：顺酐 Γ-丁内酯 气相加氢 铜基催化剂 稀土 

分 类 号：TQ426.8[化学工程] TQ225.24