Alkylbenzene synthesis from benzene and syngas over a ZnCrOx/beta bifunctional catalyst. Issue 6 (8th April 2022)

• Record Type: Journal Article
• Authors: Liu, Jianchao; Xu, Hong; Dong, Jinxiang; Zhou, Ligong; Li, Xuekuan; Ge, Hui
• Is Part Of: Reaction chemistry & engineering. Volume 7:Issue 6(2022)
• Page Start: 1447
• Page End: 1460
• Publication Date: 2022-04-08
• Subjects: Reaction mechanisms (Chemistry) -- Periodicals; Chemical engineering -- Periodicals; Chemical engineering; Reaction mechanisms (Chemistry); Periodicals; 547.705
• DOI: 10.1039/d2re00026a
• Languages: English
• ISSNs: 2058-9883

Abstract

Abstract : ZnCrOx/beta bifunctional catalyst. Abstract : The synthesis of alkylbenzenes produced from syngas and benzene over a ZnCrOx/beta bifunctional catalyst has been studied. Our characterization results showed that in the mixed catalyst the beta-zeolite crystallites were dispersed on the surface of the ZnCr oxides. The close contact facilitated the methanol intermediate formed on ZnCrOx to diffuse to the acidic sites of the beta-zeolite crystallites, reacting with benzene to produce alkylbenzenes. The competitive side reactions, which lead to by-products such as CO2 and hydrocarbons, were suppressed. The medium strong acidity and mesopores of the beta-zeolite crystallites contributed to the high activity and selectivity. The optimized ZnCrOx/beta-11 = 1 : 3 (w/w) afforded 40.72% benzene and 62.40% CO conversion with high alkylbenzene selectivity during the initial stage of the reaction, which then underwent quick deactivation, and maintained a benzene conversion of ∼27%. Coke formation on the beta-zeolite crystallites was proposed to be the main cause of deactivation.