文献类型：期刊文献

英文题名：Control of Framework Aluminum Distribution in MFI Channels on the Catalytic Performance in Alkylation of Benzene with Methanol

作者：Wang, Yilin[1];He, Xuan[1];Yang, Fan[1];Su, Zhaojie[1];Zhu, Xuedong[1]

机构：[1]East China Univ Sci & Technol, Engn Res Ctr Large Scale Reactor Engn & Technol, Minist Educ, Shanghai 200237, Peoples R China

年份：2020

卷号：59

期号：30

起止页码：13420

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20203609148507);WOS:【SCI-EXPANDED(收录号:WOS:000557853400008)】；

基金：We acknowledge the financial support from the National Natural Science Foundation of China (No. 21776076) and the Fundamental Research Funds for the Central Universities (WA1817013).

语种：英文

外文关键词：Xylene - Zeolites - Methanol - Alkylation - Aluminum

摘要：Framework aluminum (Al-F) has a correlative relationship with the acid sites in a zeolite, which has been regarded as the key point during the adsorption behavior in alkylation of benzene with methanol. Here, the Al-F distribution in HZSM-5 channels was successfully controlled by different pore-filling agents and organic structure-directing agents (OSDAs) in the synthesis step. HZSM-5 samples with Al-F preferentially located in the intersections and sinusoidal/straight channels were synthesized using tetrapropylammonium hydroxide and pentaerythritol with Na cations as an OSDA and a pore-filling agent, respectively. Catalytic performances in alkylation of benzene with methanol showed that HZSM-5 zeolite with Al-F sitting in the channel and channel intersections generated a coadsorption effect yielding higher benzene conversion, xylene selectivity, and catalytic stability in this reaction. Meanwhile, HZSM-5 zeolite with more Al-F located particularly in the sinusoidal channel exhibited better shape selectivity to the para-xylene product.