HMCM-22分子筛催化丙烯齐聚反应性能的研究

石油炼制与化工 ›› 2024, Vol. 55 ›› Issue (10): 48-59.

HMCM-22分子筛催化丙烯齐聚反应性能的研究

孔素芳,张成喜,李永祥,周顺利,陈俊文,刘强

中石化石油化工科学研究院有限公司，石油化工分子转化与反应工程全国重点实验室

收稿日期:2024-03-27 修回日期:2024-07-16 出版日期:2024-10-12 发布日期:2024-09-26
通讯作者: 孔素芳 E-mail:1252019629@qq.com
基金资助:
理性设计过渡态择性催化芳烃烷基化反应研究

STUDY ON CATALYTIC PERFORMANCE OF HMCM-22 ZEOLITE FOR PROPYLENE OLIGOMERIZATION

Received:2024-03-27 Revised:2024-07-16 Online:2024-10-12 Published:2024-09-26

摘要/Abstract

摘要： 研究了HMCM-22分子筛催化丙烯齐聚反应性能，并与HZSM-5、HY、HMOR、Hβ 分子筛进行比较，通过一系列物性表征手段及丙烯齐聚反应性能评价，考察了5种分子筛孔结构、酸性质与丙烯齐聚反应性能的关系。结果表明，分子筛的拓扑结构和酸性对丙烯齐聚反应活性、选择性和稳定性有显著的影响，HMCM-22分子筛具有多维孔道结构与适中酸性，产物扩散性能好，抗积炭性能优异，在丙烯齐聚反应中的活性与稳定性最优。进一步对HMCM-22分子筛进行孔道和酸性调变以考察其催化丙烯齐聚反应性能，发现B酸酸量与总酸量大的HMCM-22分子筛初始活性高且更易生成高碳数产物，但C_3n选择性偏低，介孔比例适中的分子筛稳定性更好。HMCM-22分子筛稳定性评价结果表明，在300 h内丙烯转化率均保持在85%以上，C_3n选择性达77.6%，具有优异的丙烯齐聚活性、选择性和稳定性。

关键词: 丙烯齐聚, HMCM-22, 分子筛, 孔结构, 酸性质

Abstract: The propylene oligomerization catalyzed by HMCM-22 zeolite was studied and compared with HZSM-5, HY, HMOR and Hβ zeolite. The relationship between pore structure, acid properties and propylene oligomerization performance of 5 kinds of zeolites were investigated by a series of physical characterization methods and propylene oligomerization evaluation. The results showed that the topological structure and acidity of HMCM-22 zeolite had significant effects on the activity, selectivity and stability of propylene oligomerization. HMCM-22 zeolite has multi-dimensional pore structure, moderate acidity, good product diffusion performance and excellent carbon accumulation resistance, and the activity and stability of propylene oligomerization reaction are the best. It was found that HMCM-22 zeolite with high acid content of B acid and total acid had high initial activity and was easy to produce high carbon number products, but the zeolite with low selectivity of C_3n and moderate mesoporous ratio had better stability. The results of stability evaluation of HMCM-22 zeolite showed that the conversion rate of propylene was over 85% and the selectivity of C_3n reached 77.6% within 300 h, which indicated excellent propylene oligomerization activity, selectivity and stability.

Key words: propylene oligomerization, HMCM-22, zeolite, pore structure, acidity

孔素芳张成喜李永祥周顺利陈俊文刘强. HMCM-22分子筛催化丙烯齐聚反应性能的研究[J]. 石油炼制与化工, 2024, 55(10): 48-59.

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