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题名: Gas humidification performance of cellulose hollow fiber membranes
作者: Jie, XM;  Liu, JH;  Cao, YM;  Yuan, Q
关键词: proton exchange membrane fuel cell ;  gas humidification ;  cellulose hollow fiber membrane ;  gas permeation ;  swelling
刊名: ACTA POLYMERICA SINICA
发表日期: 2005-10-01
期: 5, 页:704-708
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Polymer Science
研究领域[WOS]: Polymer Science
英文摘要: With deionized water as bore fluid and tap water as external coagulant, cellulose hollow fiber membranes (CHFM) were prepared from a dope composed of cellulose/N-methylmorpholine-N-oxide (NMMO)/H2O using a wet spinning process. The prepared CHFM showed dramatic dimension shrinkage after being naturally dried and the resulted dry CHFM possessed a homogeneously dense structure that could ensure the water permeation stability during the humidification process. The swelling performance of CHFM in water at different temperatures was tested and it was proven that increasing temperature would inhibit cellulose swelling in water. Also its permeation rates in "water-swollen" state for gases such as H, and 0, were measured that could help to make sure only little gas leakage would happen during the humidification process. Influence of water-gas pressure difference and water temperature on the water permeation flux of CHFM was investigated. The results show that the water permeation flux of CHFM increased with both the water-gas pressure difference and water temperature. With water-gas pressure difference at 0.2 MPa and water temperature at 80 degrees C, its water permeation flux could reach as high as 0.63 L/(m(2 .) h). The preliminary experiments were carried out to test its humidification ability for reacting gases of proton exchange membrane fuel cell (PEMFC). With the self-made humidification module, the relative humidity of gases could be increased to over 90% under certain conditions. All these results show that the humidification ability of CHFM is excellent,which means that it is suitable to be used in the humidification system for PEMFC.
关键词[WOS]: SYSTEMS
语种: 英语
WOS记录号: WOS:000232858500012
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139889
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

Recommended Citation:
Jie, XM,Liu, JH,Cao, YM,et al. Gas humidification performance of cellulose hollow fiber membranes[J]. ACTA POLYMERICA SINICA,2005(5):704-708.
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