Effect of Si/Al ratio in the framework on the pervaporation properties of hollow fiber CHA zeolite membranes

Ji Jiang; Li Peng; Xuerui Wang; Hao Qiu; Miaomiao Ji; Xuehong Gu

doi:10.1016/j.micromeso.2018.07.015

Effect of Si/Al ratio in the framework on the pervaporation properties of hollow fiber CHA zeolite membranes

Ji Jiang, Li Peng, Xuerui Wang, Hao Qiu, Miaomiao Ji, Xuehong Gu

化工学院

Nanjing Tech University

科研成果: 期刊稿件 › 文章 › 同行评审

36 引用（Scopus）

摘要

Hollow fiber supported CHA zeolite membranes with different Si/Al ratios in the framework were successfully synthesized by changing precursor compositions. The influence of precursor composition on the membrane composition, microstructure evolution and dehydration performances of CHA zeolite membranes, were extensively investigated. Pervaporation (PV) results indicated that the membrane separation performances were strongly influenced by both the framework Si/Al ratio and the microstructure of the membranes. The membranes with Si/Al ratio of ca. 2.7–2.8 composed of flake-like grains showed higher flux with relatively low selectivity, while the membrane with Si/Al ratio of >2.9 composed of block-shaped crystals exhibited higher separation factor of >10000. Both hydrothermal and acid stability of the membranes were dependent on the framework Si/Al ratio of CHA zeolite membranes.

源语言	英语
页（从-至）	196-202
页数	7
期刊	Microporous and Mesoporous Materials
卷	273
DOI	https://doi.org/10.1016/j.micromeso.2018.07.015
出版状态	已出版 - 1 1月 2019

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title = "Effect of Si/Al ratio in the framework on the pervaporation properties of hollow fiber CHA zeolite membranes",

abstract = "Hollow fiber supported CHA zeolite membranes with different Si/Al ratios in the framework were successfully synthesized by changing precursor compositions. The influence of precursor composition on the membrane composition, microstructure evolution and dehydration performances of CHA zeolite membranes, were extensively investigated. Pervaporation (PV) results indicated that the membrane separation performances were strongly influenced by both the framework Si/Al ratio and the microstructure of the membranes. The membranes with Si/Al ratio of ca. 2.7–2.8 composed of flake-like grains showed higher flux with relatively low selectivity, while the membrane with Si/Al ratio of >2.9 composed of block-shaped crystals exhibited higher separation factor of >10000. Both hydrothermal and acid stability of the membranes were dependent on the framework Si/Al ratio of CHA zeolite membranes.",

keywords = "CHA zeolite membrane, Microstructure evolution, Pervaporation, Si/Al ratio, Stability",

author = "Ji Jiang and Li Peng and Xuerui Wang and Hao Qiu and Miaomiao Ji and Xuehong Gu",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Inc.",

year = "2019",

month = jan,

day = "1",

doi = "10.1016/j.micromeso.2018.07.015",

language = "英语",

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T1 - Effect of Si/Al ratio in the framework on the pervaporation properties of hollow fiber CHA zeolite membranes

AU - Jiang, Ji

AU - Peng, Li

AU - Wang, Xuerui

AU - Qiu, Hao

AU - Ji, Miaomiao

AU - Gu, Xuehong

PY - 2019/1/1

Y1 - 2019/1/1

N2 - Hollow fiber supported CHA zeolite membranes with different Si/Al ratios in the framework were successfully synthesized by changing precursor compositions. The influence of precursor composition on the membrane composition, microstructure evolution and dehydration performances of CHA zeolite membranes, were extensively investigated. Pervaporation (PV) results indicated that the membrane separation performances were strongly influenced by both the framework Si/Al ratio and the microstructure of the membranes. The membranes with Si/Al ratio of ca. 2.7–2.8 composed of flake-like grains showed higher flux with relatively low selectivity, while the membrane with Si/Al ratio of >2.9 composed of block-shaped crystals exhibited higher separation factor of >10000. Both hydrothermal and acid stability of the membranes were dependent on the framework Si/Al ratio of CHA zeolite membranes.

AB - Hollow fiber supported CHA zeolite membranes with different Si/Al ratios in the framework were successfully synthesized by changing precursor compositions. The influence of precursor composition on the membrane composition, microstructure evolution and dehydration performances of CHA zeolite membranes, were extensively investigated. Pervaporation (PV) results indicated that the membrane separation performances were strongly influenced by both the framework Si/Al ratio and the microstructure of the membranes. The membranes with Si/Al ratio of ca. 2.7–2.8 composed of flake-like grains showed higher flux with relatively low selectivity, while the membrane with Si/Al ratio of >2.9 composed of block-shaped crystals exhibited higher separation factor of >10000. Both hydrothermal and acid stability of the membranes were dependent on the framework Si/Al ratio of CHA zeolite membranes.

KW - CHA zeolite membrane

KW - Microstructure evolution

KW - Pervaporation

KW - Si/Al ratio

KW - Stability

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U2 - 10.1016/j.micromeso.2018.07.015

DO - 10.1016/j.micromeso.2018.07.015

M3 - 文章

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SN - 1387-1811

VL - 273

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JO - Microporous and Mesoporous Materials

JF - Microporous and Mesoporous Materials

ER -

Effect of Si/Al ratio in the framework on the pervaporation properties of hollow fiber CHA zeolite membranes

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