Abstract

The study investigates the activity, selectivity, and stability of dealuminized H-Beta zeolite samples in the oligomerization of pent-1-ene. It was demonstrated that the yield of pentene oligomers primarily depends on the concentration of acid sites in the catalyst. At 110°C, the highest oligomer yield is achieved by an initial H-Beta (33 wt %), while samples subjected to citric acid treatment (H-Beta-1), steam heating (H-Beta-2), and combined treatment (H-Beta-3) are less active in oligomerization, isomers being yielded as the main product. The investigation of the functional dependence of monomer conversion rate and product composition on reaction conditions in the presence of the H-Beta-3 micro/mesoporous sample revealed that the pentene oligomer yield reaches 89% at 200°C, 10 wt % catalyst, and 5 h. Micro/mesoporous zeolites ensure a wider molecular weight distribution of oligomers. The examination of the H-Beta and H-Beta-3 stability in the oligomerization of pent-1-ene identified H-Beta-3 as the most stable sample.

中文翻译：

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脱铝的β沸石样品中Pent-1-ene的低聚

摘要

该研究调查了脱铝的H-Beta沸石样品在戊-1-烯低聚中的活性，选择性和稳定性。已证明戊烯低聚物的产率主要取决于催化剂中酸位的浓度。在110°C下，通过初始H-Beta（33 wt％），同时进行柠檬酸处理（H-Beta-1），蒸汽加热（H-Beta-2）和合并的样品可获得最高的低聚物收率处理（H-Beta-3）在低聚反应中活性较低，异构体为主要产物。在H-Beta-3微孔/中孔样品的存在下，单体转化率和产物组成对反应条件的功能依赖性研究表明，戊烯低聚物在200°C下的收率达到89％，催化剂为10 wt％， 5小时 微孔/中孔沸石确保低聚物的分子量分布更宽。对戊-1-烯低聚中的H-Beta和H-Beta-3稳定性进行检查后，发现H-Beta-3是最稳定的样品。