期刊
COMPTES RENDUS CHIMIE
卷 18, 期 8, 页码 834-847出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.crci.2015.05.002
关键词
Hierarchical porosity; High-silica ZSM-5; Methanol-to-propylene (MTP); Desilication; Selectivity
资金
- Iranian Nano Technology Initiative Council
The influence of alkaline treatments with NaOH and NaOH/TPAOH mixtures on the physicochemical properties and catalytic performance of high-silica ZSM-5 zeolites (Si/Al = 175) during the methanol-to-propylene (MTP) reaction have been investigated. It was found that alkaline treatment in an NaOH/TPAOH solution with TPAOH/(NaOH + TPAOH) = 0.4 ensures the formation of narrow and uniform intracrystalline mesoporosity without severely damaging the crystal structure and the intrinsic acidity of the zeolite, leading to the best catalytic performance, including the highest propylene selectivity (47.2) and P/E ratio (4.97) as well as the longest catalyst lifetime (80 h). (c) 2015 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.
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