Mo基、W基催化剂的制备及其丙烷脱氢性能研究  

Preparation of Mo-based and W-based catalysts and evaluation on their performance in propane dehydrogenation

作　　者：宋卫余 杨坤 赖自强 宋少佳 SONG Wei-yu;YANG Kun;LAI Zi-qiang;SONG Shao-jia(State Key Laboratory of Heavy Oil Processing,China University of Petroleum-Beijing,Beijing 102249,China)

机构地区：[1]中国石油大学(北京)重质油国家重点实验室,北京102249

出　　处：《现代化工》2022年第7期120-124,129,共6页Modern Chemical Industry

基　　金：国家自然科学基金重点项目(22035009);中国石油大学(北京)自然科学基金(ZX20200079);重质油国家重点实验室项目(2021-03)。

摘　　要：为探究Mo基、W基催化剂的丙烷脱氢性能,分别以ZSM-5分子筛和S-1分子筛为载体,通过浸渍法制备了5%负载量的Mo基、W基催化剂,并通过活性测试检测其催化活性,发现同为5%负载量下Mo基催化剂的活性要高于W基催化剂。以不同硅铝摩尔比的ZSM-5为载体制备1%Mo基催化剂,研究载体酸性对催化活性的影响。结果表明,随着硅铝摩尔比的逐渐增大,其B酸量降低,从而稳态下的转化率逐渐变小;与之相反,目标产物丙烯的选择性随着硅铝摩尔比逐渐增大而增大。In order to explore the performance of Mo-based and W-based catalysts in propane dehydrogenation, 5%-loading Mo-based and W-based catalysts are prepared by the impregnation method with ZSM-5 zeolite and S-1 zeolite as carriers, respectively.The samples’ catalytic activity are evaluated.It is found that the Mo-based catalyst exhibits a higher catalytic activity than W-based catalyst under the same 5% loading.Furthermore, a 1% Mo-based catalyst is prepared using ZSM-5 with different Si/Al ratio as the support, and the effect of the acidity of the support on the catalytic activity is studied.It is verified that with the gradual increase of Si/Al ratio, the amount of B acid in catalyst decreases, so the conversion rate under steady state decreases gradually.On the contrary, the selectivity of the target product propylene increases with the gradual increase of Si/Al ratio in catalyst.

关 键 词：丙烷脱氢 Mo基催化剂 浸渍法 ZSM-5分子筛 载体酸度 

分 类 号：TQ423.93[化学工程]