Effects of NaOH-TPAOH mixed alkali on ZSM-5 zeolite modification

被引：0

作者：

Gao Y. ^{[1
]}

Huang X.-L. ^{[1
]}

Zi Q. ^{[1
]}

Peng W.-Y. ^{[1
]}

Zhang X. ^{[1
]}

Tian H.-F. ^{[1
]}

Liu Z.-Y. ^{[1
]}

Dong L. ^{[1
]}

机构：

[1] College of Chemical Engineering, China University of Petroleum, Beijing

来源：

Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities | 2020年 / 34卷 / 03期

关键词：

Alkylation; Mixed alkali treatment; Stability; ZSM-5 molecular sieve;

D O I：

10.3969/j.issn.1003-9015.2020.03.025

中图分类号：

学科分类号：

摘要：

In order to further improve alkylation performance of ZSM-5 molecular sieves, the HZSM-5 zeolite molecular sieve was treated with NaOH-TPAOH mixed alkali. The effects of total amount of OH ̄ (total alkali amount) in the mixed alkali system on the performance of benzene-methanol alkylation reaction were studied at n(NaOH)/n(TPAOH) = 0.6. The results show that when the alkaline concentration is low, it does not destroy the skeleton structure of ZSM-5, and the surface of ZSM-5 crystals become smooth with certain amount of mesopore appears. With the increase of alkaline concentration, the weak acid of the catalyst increases, and the strength of the strong acid gradually decreases. For the benzene-methanol alkylation reaction with total alkaline amount of 6.4 mmol, the benzene conversion rate is 48% and the carbon deposition amount is low under liquid volume space velocity of 85 h-1 for 10 h. © 2020, Editorial Board of Journal of Chemical Engineering of Chinese Universities". All right reserved."

引用

页码：749 / 755

页数：6

共 18 条

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