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采用溶胶-凝胶法制备了CeO_2-CuO/ZnO/Al_2O_3,通过XRD检测了CeO_2-CuO/ZnO/Al_2O_3,揭示了CeO_2-CuO/ZnO/Al_2O_3微观结构和内在规律。结果发现,金属离子之间存在协同效应,以1,5-戊二醇气相催化脱氢制备δ-环戊内酯为探针反应,评价其催化活性,3%CeO_2的CuO/ZnO/Al_2O_3呈现出最高催化活性。催化反应的最佳反应条件:反应温度为563 K,气时空速为5 h-1,反应时间为5 h,V(氢气)∶V(1,5-戊二醇)=2.0∶1,p(H2)=0.12 MPa,此时,1,5-戊二醇的转化率为93.0%,δ-环戊内酯的选择性和收率最大值分别达到94.0%、87.4%。该方法为1,5-戊二醇气相催化脱氢制备δ-环戊内酯的中试和工业放大性研究提供了基础数据和实验依据。
The CeO_2-CuO / ZnO / Al_2O_3 was prepared by sol-gel method and the CeO_2-CuO / ZnO / Al_2O_3 was characterized by XRD. The microstructure and intrinsic rules of CeO_2-CuO / ZnO / Al_2O_3 were revealed. The results showed that there was a synergistic effect between the metal ions. The catalytic activity of δ-cyclopentanolactone was detected by gas-phase catalytic dehydrogenation of 1,5-pentanediol. The catalytic activity of CuO / ZnO / Al 2 O 3 in 3% CeO 2 The highest catalytic activity. The optimum reaction conditions were: reaction temperature 563 K, gas hourly space velocity 5 h -1, reaction time 5 h, V (hydrogen): V (1,5-pentanediol) = 2.0:1, p (H2) = 0.12 MPa. At this point, the conversion of 1,5-pentanediol was 93.0% and the selectivity and yield of δ-cyclopentanolactone reached 94.0% and 87.4%, respectively. The method provided the basic data and experimental basis for the pilot-scale and industrial amplification of δ-cyclopentanolactone by gas-phase catalytic dehydrogenation of 1,5-pentanediol.