The effect of co-existing nitrogen on hydrogen permeation through thin Pd composite membranes
文献类型：期刊论文
| 作者 | Wang, Weiping; Pan, Xiulian; Zhang, Xiaoliang; Yang, Weishen; Xiong, Guoxing |
| 刊名 | separation and purification technology
 |
| 出版日期 | 2007-04-01 |
| 卷号 | 54期号:2页码:262-271 |
| 关键词 | Pd composite membrane hollow fiber hydrogen permeance nitrogen deactivation regeneration |
| 产权排序 | 1;1 |
| 通讯作者 | 熊国兴 |
| 英文摘要 | this study reports the poisoning effect of co-existing nitrogen on hydrogen permeation through pd composite membranes, consisting of thin pd layers supported on alpha-al2o3 hollow fibers. hydrogen permeation of the composite membranes was measured at temperatures of 623-773 k for pure gas permeation in sequence of hydrogen, nitrogen and hydrogen and for mixture gas separation of equimolar h-2/n-2. the composite membranes were defect-free and gave high hydrogen permeance of 31.2m(3)/m(2) h bar at 773 k. however, when the h-2 activated composite membranes were exposed to nitrogen for a certain time, the followed hydrogen permeance decreased in comparison with the original value. the degree of decrease increased with decreasing temperature and with exposure time. furthermore, when the composite membranes were exposed to the mixture feed of equimolar h2/n2 with certain total flow rate at temperatures of 673-723 k, the hydrogen flux on the permeate side kept stable only for several 100 min then decreased gradually to some extent. and significant reduction could be obtained during the followed pure hydrogen permeance test in comparison with the original value for the fresh membranes. fortunately, no additional defects were formed on the pd layers during these processes and the deactivations of the composite membranes were reversible. a certain-time hydrogen treatment at 773 k was sufficient to regenerate the deactivated membranes. the blocking of the active sites on pd surface for hydrogen diffusion by the formed nitrogen-containing species (nhx, x = 0-2) was responsible for the deactivation of the membranes in the suggested deactivation mechanism. (c) 2006 elsevier b.v. all rights reserved. |
| WOS标题词 | science & technology ; technology |
| 类目[WOS] | engineering, chemical |
| 研究领域[WOS] | engineering |
| 关键词[WOS] | palladium alloy membranes ; iron surfaces ; hollow fibers ; dehydrogenation ; h-2 ; permeability ; separation ; adsorption ; kinetics ; ammonia |
| 收录类别 | SCI |
| 原文出处 | true |
| 语种 | 英语 |
| WOS记录号 | WOS:000246037400017 |
| 公开日期 | 2010-11-30 |
| 源URL | [http://159.226.238.44/handle/321008/99421]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Weiping,Pan, Xiulian,Zhang, Xiaoliang,et al. The effect of co-existing nitrogen on hydrogen permeation through thin Pd composite membranes[J]. separation and purification technology,2007,54(2):262-271. |
| APA | Wang, Weiping,Pan, Xiulian,Zhang, Xiaoliang,Yang, Weishen,&Xiong, Guoxing.(2007).The effect of co-existing nitrogen on hydrogen permeation through thin Pd composite membranes.separation and purification technology,54(2),262-271. |
| MLA | Wang, Weiping,et al."The effect of co-existing nitrogen on hydrogen permeation through thin Pd composite membranes".separation and purification technology 54.2(2007):262-271. |
入库方式： OAI收割
来源：大连化学物理研究所
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