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제 목 : Metal acid balance adjustment on M/Zeolite catalysts and the synergistic catalytic performance in benzene hydroalkylation
연 사 : Prof.Zhikun Peng(Zhengzhou University)
일 시 : 2021년 11월 18일(목) 오후 4시 30분
방번호: 170 974 2739
Metal acid balance adjustment on M/Zeolite catalysts and the synergistic catalytic performance in benzene hydroalkylation
Henan Institutes of Advanced Technology, Zhengzhou University, Zhengzhou 450003, P.R. China
The synergistic coupling of benzene hydrogenation and alkylation on bifunctional catalysts is an ideal way to synthesize cyclohexylbenzene (CHB). Compared with the alkylation of benzene with cyclohexene and biphenyl hydrogenation, the hydroalkylation of benzene shows larger application prospects in technology, environmental friendliness, and efficiency. Until now, the structure of catalysts and the synergistic mechanism of bifunctional sites for benzene hydroalkylation have not been systematically studied, which limits the rational design and industrial application of the catalysts. Here, a series of supported M/Zeolite catalysts were designed and synthesized for benzene hydroalkylation, to identify the metal/acid balance and further understand the coupling reaction mechanism. This work investigates the intrinsic correlation between the metal acidic balance and the selectivity as well as yield of CHB with chemisorption and in situ spectroscopy technology. With the power of DFT calculation, the study can also reveal the synergistic reaction mechanism in different functional regions, clarify the structure-activity relationship, and precisely control the formation of the two active sites and their synergy effects.