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题名: Synthesis of a zeolite membrane as a protective layer on a metallic Pd composite membrane for hydrogen purification
作者: Yu, Jiafeng1;  Qi, Chenchen1;  Zhang, Jixin1;  Bao, Chun1;  Xu, Hengyong1
刊名: JOURNAL OF MATERIALS CHEMISTRY A
发表日期: 2015
DOI: 10.1039/c4ta06463a
卷: 3, 期:9, 页:5000-5006
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Energy & Fuels ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Energy & Fuels ;  Materials Science
英文摘要: Palladium composite membranes are used widely in the hydrogen purification process owing to their excellent hydrogen permeability and selectivity. However, they can lose hydrogen permeability irreversibly when exposed to a small amount of impurity gases, which severely limits their applications. Here, a seed-free hydrothermal method was developed to synthesize a zeolite membrane on the surface of an ultra-thin metallic Pd composite membrane to offer protection from impurity gases. The impurity gases with a kinetic diameter larger than the zeolite pore size were prevented from coming in direct contact with the Pd composite membrane. The presence of a protective zeolite membrane distinctly suppressed the hydrogen permeance decline in a 5% propylene/hydrogen mixture, which greatly enhanced the stability of the Pd membrane. SEM and XRD showed that the acid pretreatment before the secondary hydrothermal growth process and the rotary state were beneficial for synthesizing thin and uniform zeolite membranes. With increasing synthesis time, the protective effects of the zeolite membrane were enhanced significant due to the reduction of defects.
关键词[WOS]: MOLECULAR-SIEVE FILMS ;  LTA MEMBRANES ;  PERMEATION CHARACTERISTICS ;  SODALITE MEMBRANES ;  CO INHIBITION ;  SEPARATION ;  PALLADIUM ;  PERFORMANCE ;  MECHANISM ;  GROWTH
语种: 英语
WOS记录号: WOS:000349997000031
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145969
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 Natl Lab Clean Energy, Dalian 116023, Peoples R China

Recommended Citation:
Yu, Jiafeng,Qi, Chenchen,Zhang, Jixin,et al. Synthesis of a zeolite membrane as a protective layer on a metallic Pd composite membrane for hydrogen purification[J]. JOURNAL OF MATERIALS CHEMISTRY A,2015,3(9):5000-5006.
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