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

COLLEGE OF CHEMICAL ENGINEERING

Nanjing Tech University

Research output: Contribution to journal › Article › peer-review

34 Scopus citations

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.

Original language	English
Pages (from-to)	196-202
Number of pages	7
Journal	Microporous and Mesoporous Materials
Volume	273
DOIs	https://doi.org/10.1016/j.micromeso.2018.07.015
State	Published - 1 Jan 2019

Keywords

CHA zeolite membrane
Microstructure evolution
Pervaporation
Si/Al ratio
Stability

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10.1016/j.micromeso.2018.07.015

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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",

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year = "2019",

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

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TY - JOUR

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

AN - SCOPUS:85049586087

SN - 1387-1811

VL - 273

SP - 196

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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

Abstract

Keywords

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