Pt supported on Zn modified silicalite-1 zeolite as a catalyst for n-hexane aromatization

被引：0

作者：

Guodong Liu ^{[1
]}

Jiaxu Liu ^{[1
]}

Ning He ^{[1
]}

Shishan Sheng ^{[2
]}

Guiru Wang ^{[1
]}

Hongchen Guo ^{[1
]}

机构：

[1] Department of Catalytic Chemistry and Engineering & State Key Laboratory of Fine Chemicals, Dalian University of Technology

[2] State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences

来源：

Journal of Energy Chemistry | 2019年 / 07期

关键词：

Silicalite-1; zeolite; Pt-Zn/Silicalite-1; n-Hexane aromatization; Sulfur-resistance;

D O I：

暂无

中图分类号：

O643.36 [催化剂]; O621.251 [];

学科分类号：

081705 ; 070303 ; 081704 ;

摘要：

Platinum（Pt）supported on Zinc（Zn）modified silicalite-1（S-1）zeolite（denoted as Pt-Zn/S-1）was prepared by using a wetness-impregnation method and applied in the n-hexane aromatization reaction for the first time.Both Lewis and Br?nsted acid sites were detected in Pt-Zn/S-1 catalyst by means of FT-IR adsorption of NH3 experiment,which were identified as mostly weak and medium ones.Besides,Pt and Zn species showed strong interaction,as revealed by the TPR（Temperature-programmed reduction）and XPS（X-ray photoelectron spectroscopy）experiments.Pt-Zn/S-1 catalyst exhibited excellent aromatization function rather than isomerization and cracking side reactions in the conversion of n-hexane.Pulse experimental study showed that 75.6% of n-hexane conversion and 76.8% of benzene selectivity were obtained over Pt0.1-Zn6.0/S-1 catalyst at 550℃ and under atmospheric pressure.By spectroscopy tests and pulse experimental results,it was concluded that the n-hexane aromatization over Pt-Zn/S-1 catalyst follows a metal-acid bifunctional mechanism.Furthermore,with the assistance of Zn,the electron-deficient Pt species in Pt-Zn/S-1 showed good sulfur tolerance performance.

引用

页码：96 / 103

页数：8