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题名: High-purity COx-free H-2 generation from NH3 via the ultra permeable and highly selective Pd membranes
作者: Zhang, J;  Xu, HY;  Li, WZ
关键词: H-2 generation ;  COx-free ;  NH3 decomposition ;  Pd membrane ;  membrane reactor
刊名: JOURNAL OF MEMBRANE SCIENCE
发表日期: 2006-06-01
DOI: 10.1016/j.memsci.2005.10.014
卷: 277, 期:1-2, 页:85-93
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology ;  Physical Sciences
类目[WOS]: Engineering, Chemical ;  Polymer Science
研究领域[WOS]: Engineering ;  Polymer Science
英文摘要: A compact H-2 generation system that coupled NH3 decomposition with Pd membrane separation has been developed to provide high-purity COx-free H-2 for the fuel cell uses. The ultra permeable and highly selective Pd membranes supported on porous ceramic tubes were successfully synthesized. Firstly, the NH3 decomposition reaction over the Ni-based catalyst was carried out in a Pd membrane reactor, through which the in situ removal of H-2 product significantly enhanced the NH3 conversion. It is further observed that the permeation performance was greatly limited by the low effective utilization of membrane in the NH3-rich zone. When having integrated reaction with separation separately, we obtained a 54 m(3) m(-2) h(-1) 99.96% H-2 stream with a H-2 recovery yield of 77%. Therefore, it is suggested that the combination of an NH3 cracker with a followed Pd membrane separator is more preferable for on-site H-2 generation. Throughout a 500-h lifetime test, both the reaction and separation units showed a good stability. The residual NH3 slightly inhibited the permeability of the Pd membrane. Nevertheless, the permeability of the used membrane could be recovered and finally increased by the air and followed H-2 treatments. (c) 2005 Elsevier B.V. All rights reserved.
关键词[WOS]: FUEL-CELL APPLICATIONS ;  AMMONIA DECOMPOSITION ;  PALLADIUM MEMBRANE ;  HYDROGEN SEPARATION ;  COMPOSITE MEMBRANES ;  FABRICATION ;  PERMEATION ;  KINETICS ;  ALLOYS ;  SILVER
语种: 英语
WOS记录号: WOS:000238310100010
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139974
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, Grad Sch, Dalian Inst Chem Phys, Dalian 116023, Peoples R China

Recommended Citation:
Zhang, J,Xu, HY,Li, WZ. High-purity COx-free H-2 generation from NH3 via the ultra permeable and highly selective Pd membranes[J]. JOURNAL OF MEMBRANE SCIENCE,2006,277(1-2):85-93.
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