复合催化剂WO_(3)/ZrO_(2)-SiO_(2)的制备及其在仲醇脱水制备α-烯烃中的应用  

Preparation of Composite Catalyst WO_(3)/ZrO_(2)-SiO_(2) and Its Application in the Dehydration of Secondary Alcohols to α-Olefins

作　　者：王铁林 冯柏成[1] 张鹤型 WANG Tielin;FENG Baicheng;ZHANG Hexing(College of Chemical Engineering,Qingdao University of Science and Technology,Qingdao 266042,China)

机构地区：[1]青岛科技大学化工学院,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2022年第6期40-45,共6页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：山东省自然科学基金项目(ZR2020MB132)。

摘　　要：采用等体积浸渍法合成复合催化剂WO_(3)/ZrO_(2)-SiO_(2),并通过XRD、NH_(3)-TPD、XPS等表征确定其结构和性能。在固定床反应器上通过仲醇脱水制备α-烯烃对催化剂活性进行评价。结果表明:在WO_(3)负载量(质量分数)为15%,n(Zr)/n(Si)为1/1、焙烧温度600℃、焙烧时间6 h时所制备的催化剂最具催化活性,在固定床反应器中进行仲醇脱水实验,当反应温度为350℃、空速0.3 h^(-1)时,α-烯烃的有效选择性可达到80%以上。In this paper, the composite catalyst WO_(3)/ZrO_(2)-SiO_(2)was synthesized by an equal volume impregnation method, and its structure and performance were determined by XRD, NH_(3)-TPD, XPS and other characterizations. The catalyst activity was evaluated by preparing α-olefins by dehydration of secondary alcohols on a fixed bed reactor. The results show that the catalyst prepared when the loading of WO_(3) is 15%, the ratio of n(Zr)/n(Si) is 1/1, the calcination temperature is 600 ℃, and the calcination time is 6 h is the most catalytically active. The secondary alcohol dehydration experiment is carried out in a fixed bed reactor. When the temperature is 350 ℃ and the space velocity is 0.3 h^(-1), the effective selectivity of α-olefin can reach more than 80%.

关 键 词：等体积浸渍法 WO_(3)/ZrO_(2)-SiO_(2) 仲醇脱水 Α-烯烃 

分 类 号：O643.32[理学—物理化学]