文献类型：期刊文献

英文题名：Morphology Dependent Relationship between the Catalytic Performance and Zsm-5 Zeolite in Tetralin Conversion into Light Aromatics

作者：Yu, Yijun[1]; Guan, Yingjie[1]; Zhang, Peng[1]; Liu, Xinhui[1]; Zhao, Yitao[1]; Zhuang, Jianguo[1]; Zhao, Qichao[1]; Wang, Yuchen[1]; Zhu, Xuedong[1]; Yang, Fan[1]

机构：[1] Engineering Research Center of Large Scale Reactor Engineering and Technology, Ministry of Education, East China University of Science & Technology, Shanghai, 200237, China

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220383683)

语种：英文

外文关键词：Ammonia - Aromatization - Grain size and shape - Morphology - Textures

摘要：Due to the strict policy of environment protection, the application of light cycle oil (LCO) was greatly limited, and thus the route of converting tetralin into light aromatics attracted a lot attention. The conventional MFI zeolite performed ordinarily in this reaction because of the incompatibility between 10-ring channels of zeolite and the tetralin molecular. In the present work, in order to increase the accessible acid sites of zeolites to enhance the catalytical performance in the reaction of tetralin to benzene, toluene and xylene(BTX), a series of hierarchical ZSM-5 zeolites with different external acid sites were successfully prepared. In addition, chemical liquid deposition (CLD) method was used to further illustrate the effect of external acidity. Multitechniques including XRD, N 2 adsorption–desorption, SEM, NH 3 -TPD, Py-IR and Coll-IR were employed to investigate the texture properties and the distribution of acid sites for all samples. Results revealed that the reaction performance of hierarchical zeolites all improved after alkali treatment or reducing the crystal size. Among these catalysts, Z5-40 showed the most prominent reactivity and stability, which average conversion and BTX yield reached to 87.0% and 51.3%, and displayed the longest lifetime of 22h. However, Z5-CLD showed a significant drop no matter in performance or lifetime compared with Z5-40, further demonstrating that more external acid sites could enhance the reaction performance in the reaction of tetralin to BTX. These findings were useful in promoting the application of LCO into light aromatics. ? 2022, The Authors. All rights reserved.