W/Al-MCM-41催化剂的制备及其烯烃歧化性能评价  

Preparation of W/Al-MCM-41 and its performance of alkene disproportionation

作　　者：陈小博[1] 刘继霞 梁威[1] 闫昊[1] 王耀伟 郭振莲 刘熠斌[1] 杨朝合[1] CHEN Xiaobo;LIU Jixia;LIANG Wei;YAN Hao;WANG Yaowei;GUO Zhenlian;LIU Yibin;YANG Chaohe(State Key Laboratory of Heavy Oil Processing in China University of Petroleum (East China), Qingdao 266580, China;Shandong Chambroad Petrochemicals Company Limited, Binzhou 256500, China)

机构地区：[1]中国石油大学(华东)重质油国家重点实验室,山东青岛266580 [2]山东京博石油化工有限公司,山东滨州256500

出　　处：《中国石油大学学报（自然科学版）》2020年第6期149-154,共6页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家自然科学基金项目(21776312,22078364)。

摘　　要：以过剩C4烯烃和富含稀乙烯的催化裂化干气为原料,通过烯烃歧化工艺增产丙烯。以Al-MCM-41为载体,采用溶胶-凝胶法、浸渍法和热分散法,制备钨负载量为10%的W/Al-MCM-41催化剂,并考察其催化1-丁烯与乙烯的歧化反应性能。结果表明相较于浸渍法和热分散法,采用溶胶-凝胶法能够有效促进W物种与Al-MCM-41载体之间的相互作用,显著提高活性前驱体W-O-Si/Al物种数量,该催化剂表现出最优的2-丁烯转化率、丙烯选择性和稳定性;当反应温度为350℃、压力为0.1 MPa、1-丁烯与乙烯进料物质的量比为1∶1时,1-丁烯的转化率达到94%,丙烯的选择性达到85%。The yield of propylene was increased by olefin disproportionation process with C4 olefins and FCC dry gas as feedstocks.The catalysts with 10%tungsten loading were prepared by the sol-gel,impregnation and thermal dispersion methods using Al-MCM-41 as matrix.The disproportionation performance of 1-butene and ethylene over the catalysts was investigated.The results show that the catalyst prepared by sol-gel synthesis exhibits the most of active precursor of W-O-Si/Al species because the sol-gel method can effectively promote the interaction between the W species and the Al-MCM-41 matrix.Therefore,this catalyst presents the highest conversion of 2-butene,the highest selectivity of propylene,and the best stability.When the reaction temperature is 350℃,the pressure is 0.1 MPa,and the molar ratio of 1-butylene to ethylene is 1∶1,the conversion of 1-butylene reached 94%and the selectivity of propylene is 85%.

关 键 词：催化剂 制备 烯烃 歧化 性能评价 

分 类 号：TE624.41[石油与天然气工程—油气加工工程]