Enhancing stability and coaromatization of n-hexane and methanol over [Zn,Cr]/HZSM-5

被引：20
|
作者：
Fan, Su-Bing [1 ]
Wang, Dan [1 ]
Li, Hai-Bo [1 ]
Tuo, Jie [1 ]
Zhang, Xiao-Lan [1 ]
Gao, Xin-Hua [1 ]
Zhao, Tian-Sheng [1 ]
机构：
[1] Ningxia Univ, Coll Chem & Chem Engn, State Key Lab High Efficiency Utilizat Coal & Gre, Helanshan Rd 489, Yinchuan 750021, Ningxia, Peoples R China
来源：
APPLIED CATALYSIS A-GENERAL | 2020年 / 599卷
关键词：
Aromatization; Stability; Cofeeding; Xylene; Acid distribution; ZSM-5; ZEOLITES; PROPANE AROMATIZATION; HYDROCARBONS; CONVERSION; CATALYST; CRACKING; BUTANE; HZSM-5; STATE; GAS;
D O I：
10.1016/j.apcata.2020.117602
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The catalytic performance and properties of [Zn,Cr]/HZSM-5 were determined using XRD, py-FTIR, ICP, TG, and XPS and compared with those of Zn/HZSM-5 and HZSM-5 for the aromatization of n-hexane. A distinct role of Cr in enhancing n-hexane conversion, aromatic yield, and stability was observed. The catalytic performance of [Zn,Cr]/HZSM-5 and the effects of feed ratio, reaction temperature, and contact time on the coaromatization of n-hexane and methanol were investigated. Methanol addition increased the xylene yield due to methylation. Cofeeding provided high stability arising from the slow carbon deposition rate. M a feed ratio (n-hexane/methanol) of 3:7, reaction temperature 450 degrees C, and WHSV 2 h(-1), the aromatic yield was 40.1%, with xylene selectivity of 40.4%.
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页数：9
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