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以廉价的高岭土为原料,三乙胺为模板剂,采用水热法制备了负载型催化剂(SAPO-34)-高岭土。通过将CuO-ZnO负载于(SAPO-34)-高岭土表面制备了双功能催化剂CuO-ZnO/(SAPO-34)-高岭土,用XRD、SEM、EDS、BET、H_2-TPR及NH_3-TPD对合成的催化剂进行了表征,将其用于催化CO_2加氢制备低碳烯烃,在反应温度为673 K、反应压力为3 MPa、空速为1 800 m L/(g_(cat)·h)、V(CO_2)∶V(H_2)=1∶3的条件下,CO_2单程转化率为43.5%,低碳烯烃的选择性和产率分别为63.8%和27.8%。在连续8 h的催化性能测试中,低碳烯烃的产率最低为18.7%。
Using cheap kaolin as raw material and triethylamine as templating agent, the supported catalyst (SAPO-34) - kaolin was prepared by hydrothermal method. The bifunctional catalyst CuO-ZnO / (SAPO-34) -Kaolin was prepared by loading CuO-ZnO on the surface of (SAPO-34) -calcium. The synthesis of the catalyst was investigated by XRD, SEM, EDS, BET, H_2-TPR and NH_3-TPD The catalyst was characterized for hydrogenation of CO_2 to produce light olefins. The reaction temperature was 673 K, reaction pressure was 3 MPa, space velocity was 1 800 m L / (cat-h), V (CO 2): V (H 2) = 1: 3, the single pass conversion of CO 2 was 43.5% and the selectivity and yield of light olefins were 63.8% and 27.8%, respectively. In a continuous 8 h catalytic performance test, the yield of light olefins was a minimum of 18.7%.