预结焦对ZSM-5催化剂MTP反应性能的影响  

The effect of pre coking on the MTP reaction performance of ZSM-5 catalyst

作　　者：裴艳红 吕正忠 常素萍 王礼云 卜令坤 PEI Yanhong;L Zhengzhong;CHANG Suping;WANG Liyun;BO Lingkun(Ningxia Coal-to-Oil Chemical Quality Inspection and Measurement Center of National Energy Group,Yinchuan 750411,China)

机构地区：[1]国家能源集团宁夏煤业煤制油化工质检计量中心,宁夏银川750411

出　　处：《应用化工》2024年第11期2556-2561,共6页Applied Chemical Industry

基　　金：国家国际科技合作项目(2015DFA40660)。

摘　　要：使用甲醇、1-己烯、甲醇和水作为预结焦原料,采用不同的反应参数(温度和时间)制备了各种预结焦催化剂,运用程序升温化学吸附仪、元素分析仪、热重分析仪对预结焦催化剂的物化性质进行表征,运用催化剂性能评价装置对催化剂在MTP反应中的活性进行评价。结果表明,预结焦改性对ZSM-5催化剂的酸性位破坏较小,可以保持催化剂的高活性,5%甲醇溶液预结焦改性的催化剂经高温蒸汽处理(480℃)后,在MTP反应中表现出较好的抗积炭能力,丙烯的选择性达到42%。Various pre coking catalysts were prepared using methanol,1-hexene,methanol,and water as pre coking raw materials with different reaction parameters(temperature and time).The physicochemical properties of the pre coking catalysts were characterized using a temperature programmed chemical adsorption analyzer,elemental analyzer,and thermogravimetric analyzer.The activity of the catalysts in the MTP reaction was evaluated using a catalyst performance evaluation device.The results showed that pre coking modification had less damage to the acidic sites of ZSM-5 catalyst and could maintain its high activity.The catalyst pre coking modified with 5%methanol solution showed good anti coking ability in MTP reaction after high-temperature steam treatment(480℃),and the selectivity of propylene reached 42%.

关 键 词：甲醇制丙烯 催化剂 预结焦 ZSM-5分子筛 

分 类 号：TQ426.94[化学工程]