n-pentane isomerization in different phase regions near the critical temperature
文献类型：期刊论文
| 作者 | Hou, ZS; Han, BX; Zhang, JM; Liu, ZM; He, J; Zhang, XG; Yang, GY |
| 刊名 | JOURNAL OF SUPERCRITICAL FLUIDS
 |
| 出版日期 | 2003 |
| 卷号 | 25期号:1页码:81-90 |
| 关键词 | N-pentane Isomerization Coking Supercritical Fluid Sulfated Zirconia |
| ISSN号 | 0896-8446 |
| 英文摘要 | The isomerization reaction of n-pentane over porous solid acid catalyst was investigated at 198.0 degreesC, which is slightly higher than the critical temperature of n-pentane. The pressure of the reactant in the reactor was controlled so that the reaction fluid was in gas, near critical, and supercritical (SC) states. The results showed that the conversion of n-pentane increased sharply with increasing pressure near the critical point. The amount of coke deposition depends strongly on the pressure of the reaction fluid. The main reason for the deactivation of the catalyst was coke deposition on the catalyst. Deactivation of catalyst was repressed at the higher pressure because more coke precursors produced in the reaction was dissolved into the fluid, which increases the stability of the catalyst. UV-vis, IR, thermogravimetric analysis and H-1 NMR studies indicated that there were at least two kinds of coke precursors on catalyst surface. The effect of pressure on the properties of the coke was not considerable, although it influences the quantity of the coke deposition on the catalyst significantly. The loss of sulfur can be neglected at reaction temperature and the state of sulfur remains unchanged after reaction. It is advantageous to conduct the isomerization reaction at SC condition. (C) 2002 Elsevier Science B.V. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000180592900008 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/80495]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Han, BX |
| 作者单位 | Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hou, ZS,Han, BX,Zhang, JM,et al. n-pentane isomerization in different phase regions near the critical temperature[J]. JOURNAL OF SUPERCRITICAL FLUIDS,2003,25(1):81-90. |
| APA | Hou, ZS.,Han, BX.,Zhang, JM.,Liu, ZM.,He, J.,...&Yang, GY.(2003).n-pentane isomerization in different phase regions near the critical temperature.JOURNAL OF SUPERCRITICAL FLUIDS,25(1),81-90. |
| MLA | Hou, ZS,et al."n-pentane isomerization in different phase regions near the critical temperature".JOURNAL OF SUPERCRITICAL FLUIDS 25.1(2003):81-90. |
入库方式： OAI收割
来源：化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。