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题名: Zeolitic imidazolate framework ZIF-7 based molecular sieve membrane for hydrogen separation
作者: Li, Yanshuo1, 2, 3;  Liang, Fangyi1, 2;  Bux, Helge1, 2;  Yang, Weishen3;  Caro, Juergen1, 2
通讯作者: 李砚硕
关键词: Metal-organic frameworks ;  Zeolitic imidazolate frameworks ;  Molecular sieve membranes ;  ZIF-7 ;  Gas separation
刊名: JOURNAL OF MEMBRANE SCIENCE
发表日期: 2010-05-15
DOI: 10.1016/j.memsci.2010.02.074
卷: 354, 期:1-2, 页:48-54
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 504
产权排名: 2;1
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: Hydrogen-based energy system could address issues related to global climate change, energy security, and local air pollution. Thermally and hydrothermally stable microporous membranes with intrinsic high H(2)/CO(2) selectivity are highly demanded. A novel zeolitic imidazolate framework (ZIF-7) membrane was tested for its gas separation performance. ZIFs are microporous materials and belong to the new class of metal-organic frameworks (MOFs). ZIF-7 is formed by bridging benzimidazolate anions and zinc cations resulting in a sodalite (SOD) topology with a pore size of about 0.3 nm. The ZIF-7 membrane exhibited promising H(2) separation abilities. At 220 degrees C, the H(2) permeance is similar to 4.5 x 10(-8) mol m(-2) s(-1) Pa(-1) and the mixture separation factors for H(2)/CO(2), H(2)/N(2), and H(2)/CH(4) are 13.6, 18.0, and 14.0, respectively. As a result of molecular sieving mechanism, the ideal selectivities and mixture separation factors are identical. The permeation of H(2) through the ZIF-7 membrane is highly activated with an apparent activation energy of 11.9 kJ mol(-1). Due to the ultra-hydrophobic properties of ZIF materials, the ZIF-7 membrane also showed excellent hydrothermal stability in the presence of steam. Our results clearly demonstrate that ZIF-7 membranes have an intrinsic high H(2)/CO(2) selectivity and a promising application in hydrogen separation, which is based on its very narrow and well-defined crystal pore structure. (C) 2010 Elsevier B.V. All rights reserved.
关键词[WOS]: METAL-ORGANIC FRAMEWORK ;  SILICA MEMBRANE ;  GAS SEPARATION ;  ALPHA-ALUMINA ;  CARBON MEMBRANES ;  HIGH-TEMPERATURE ;  CU-3(BTC)(2) ;  SELECTIVITY ;  PERMEATION ;  STABILITY
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000277947600007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/103113
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.Leibniz Univ Hannover, Ctr Solid State Res & New Mat, Inst Phys Chem & Electrochem, D-30167 Hannover, Germany
2.Leibniz Univ Hannover, Ctr Solid State Res & New Mat, LNQE, D-30167 Hannover, Germany
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Li, Yanshuo,Liang, Fangyi,Bux, Helge,et al. Zeolitic imidazolate framework ZIF-7 based molecular sieve membrane for hydrogen separation[J]. JOURNAL OF MEMBRANE SCIENCE,2010,354(1-2):48-54.
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