教授 博士生导师 硕士生导师
性别: 男
毕业院校: 大连理工大学
学位: 博士
所在单位: 化工学院
学科: 工业催化. 物理化学
办公地点: 大连理工大学 西部校区 化工实验楼B521
联系方式: 0411-84986120
电子邮箱: hongchenguo@dlut.edu.cn
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论文类型: 期刊论文
发表时间: 2013-02-15
发表刊物: CHEMICAL ENGINEERING JOURNAL
收录刊物: SCIE、EI、Scopus
卷号: 218
页面范围: 1-8
ISSN号: 1385-8947
关键字: Low-pressure reactor; i-Butane; Zn/HZSM-5; Reaction pressure; Reaction paths
摘要: Catalytic conversion of i-butane over Zn-modified HZSM-5 catalyst was systematically investigated at different reaction pressures. A special fixed-bed reactor involving a vacuum unit which could modulate reaction pressure from subatmospheric to positive pressure was used. Results show that reaction pressure can change the initial activation and subsequent reaction paths of i-butane over Zn/HZSM-5 catalyst. At subatmospheric pressure, the decrease in reaction pressure favors the dehydrogenation of i-butane, meanwhile inhibits both the cracking of i-butane and the secondary reactions such as the oligomerization, cracking and aromatization. Consequently, the selectivities to the undesired by-products (methane and ethane) are notably abated, and the selectivities to the desired products (ethylene, propylene and aromatics) significantly increase. Although space velocity affects the reaction paths for i-butane conversion, the change in reaction pressure has a more profound effect on the reaction paths. (C) 2012 Elsevier B.V. All rights reserved.