Bifunctional Pt/Fe-ZSM-5 catalyst for xylene isomerization

被引：38
|
作者：
Rasouli, Milad [1 ]
Atashi, Hossein [1 ]
Mohebbi-Kalhori, Davod [1 ]
Yaghobi, Nakisa [2 ]
机构：
[1] Univ Sistan & Baluchestan, Dept Chem Engn, Fac Engn, Zahedan, Iran
[2] Iran Polymer & Petrochem Inst, Dept Petrochem, Tehran, Iran
来源：
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS | 2017年 / 78卷
关键词：
ZSM-5; zeolite; Xylene isomerization; EB conversion; Xylene loss; Pt impregnation; SILICA-ALUMINA; ZSM-5; ZEOLITES; OXIDATION SCO; ION-EXCHANGE; METHANOL; ETHYLBENZENE; PHOSPHORUS; SEPARATION; CONVERSION; NITROGEN;
D O I：
10.1016/j.jtice.2017.05.018
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The addition of iron to the synthesis of ZSM-5 catalysts (Si/Al=21) was studied in xylene isomerization reactions. Pt impregnation was conducted by partial vacuum impregnation on both the parent and Fe-ZSM-5. XRD, FE-SEM, ICP, BET, XPS, FT-IR, NH3-TPD, and TG analysis have been used to characterize the catalysts. Fe incorporation strongly decreased the weak acid sites and slightly reduced the strong acid sites. Reducing weak acidity led to lower coke formation and more catalytic stability in Fe-containing ZSM-5 catalysts. The presence of Pt on the Fe-supported ZSM-5 illustrated simultaneous high PX yield and high catalyst stability. (0.1 wt%)Pt/(0.4 wt%)Fe-ZSM-5 as an efficient and stable catalyst for xylene isomerization reactions demonstrated high PX yield (25.4 wt%), high EB conversion (61%) and low xylene loss (1.8%). (C) 2017 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：438 / 446
页数：9
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