Influence of Zn species in HZSM-5 on ethylene aromatization

被引：102
作者：
Chen, Xuchuan [1 ,2 ]
Dong, Mei [1 ]
Niu, Xianjun [1 ,2 ]
Wang, Kai [1 ,2 ]
Chen, Gang [1 ,2 ]
Fan, Weibin [1 ]
Wang, Jianguo [1 ]
Qin, Zhangfeng [1 ]
机构：
[1] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
CHINESE JOURNAL OF CATALYSIS | 2015年 / 36卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Ethylene; Aromatization; Zn species; HZSM-5; Dehydrogenation; DILUTE ETHYLENE; CATALYSTS; PROPANE; ZINC; CONVERSION; AROMATICS; METHANOL; ZEOLITE; TRANSFORMATION; SELECTIVITY;
D O I：
10.1016/S1872-2067(14)60289-8
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Zn-containing HZSM-5 zeolites with different Zn contents were prepared by ion exchange and physically mixing methods, and were characterized by X-ray diffraction, scanning electron microscope, N-2 adsorption-desorption, NH3 temperature programmed desorption, pyridine adsorption infrared spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy and X-ray photoelectron spectroscopy. Zn species introduced into HZSM-5 were identified as ZnO crystals, ZnO clusters in the zeolite channel and Zn(OH). species formed from a solid state reaction between dispersed ZnO and the protons in the zeolite. The preparation method has a significant influence on the distribution of the Zn species. The catalytic behavior of Zn-containing HZSM-5 with different Zn contents showed that the Zn(OH)(+) and ZnO species were responsible for aromatic formation from ethylene. (C) 2015, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：880 / 888
页数：9
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