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Density functional theory study on the mechanism of toluene from dimethylclopentane catalyzed by Ga modified ZSM-5 zeolite


Abstract The ONIOM (ωb97xd/6-31G(d,p):pm6) method was used to study the reaction mechanism of dimethylcyclopentane to toluene by the [GaH]2+ active site of Ga-ZSM-5. The results showed that the rate-determining step in the dimethylcyclopentane aromatization process is the ring expansion process. Compared to those of methylcyclopentane to benzene (D. D. Zhang, H. Y. Liu, L. X. Ling, H. R. Zhang, R. G. Zhang, P. Liu and B. J. Wang, Phys. Chem. Chem. Phys., 2021, 23, 10988–11003.), the free energy barriers of dimethylcyclopentane to toluene are significantly decreased, indicating that toluene is easier to produce than benzene, which confirmed the experimental results that a higher proportion of toluene than benzene is produced in the MTA process.
Authors Hongyan Liu ORCID , Fengzhong Sun ORCID , Jun Xu ORCID , Hairong Zhang ORCID , Ting Wu ORCID , Shenghua Han , Shijun Zhang ORCID , Ming Yan ORCID , Lixia Ling ORCID , Riguang Zhang ORCID , Maohong Fan University of WyomingORCID , Qianqian Wang ORCID
Journal Info Royal Society of Chemistry | Physical Chemistry Chemical Physics
Publication Date 1/27/2024
ISSN 1463-9076
TypeKeyword Image article
Open Access closed Closed Access
DOI https://doi.org/10.1039/d3cp04416e
KeywordsKeyword Image Methane Activation (Score: 0.48071)