In Situ Synthesis of Cation-Free Zirconia-Supported Zeolite CHA Membranes for Efficient CO2/CH4 Separation

Nana Wang; Guiliu Dang; Zhenwei Bai; Qing Wang; Bo Liu; Rongfei Zhou; Weihong Xing

doi:10.1021/acsami.2c21682

In Situ Synthesis of Cation-Free Zirconia-Supported Zeolite CHA Membranes for Efficient CO₂/CH₄ Separation

Nana Wang, Guiliu Dang, Zhenwei Bai, Qing Wang, Bo Liu, Rongfei Zhou, Weihong Xing

College of Chemical Engineering

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

12 Scopus citations

Abstract

Cation-free zirconosilicate zeolite CHA and thin zirconia-supported membranes were in situ synthesized in a fluoride-free gel for the first time. The usage of the ZrO₂/Al₂O₃ composite support inhibited the transportation of aluminum from the support into zeolite membranes. No fluorite source was used for the synthesis of cation-free zeolite CHA membranes, indicating the green property of the synthesis. The thickness of the membrane was only 1.0 μm. The best cation-free zeolite CHA membrane prepared by the green in situ synthesis displayed a high CO₂ permeance of 1.1 × 10^-6 mol/(m² s Pa) and CO₂/CH₄ selectivity of 79 at 298 K and 0.2 MPa pressure drop for an equimolar CO₂/CH₄ mixture.

Original language	English
Pages (from-to)	16853-16864
Number of pages	12
Journal	ACS Applied Materials and Interfaces
Volume	15
Issue number	13
DOIs	https://doi.org/10.1021/acsami.2c21682
State	Published - 5 Apr 2023

Keywords

CO capture
Si-CHA
in situ synthesis
natural gas sweetening
zeolite membranes

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10.1021/acsami.2c21682

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title = "In Situ Synthesis of Cation-Free Zirconia-Supported Zeolite CHA Membranes for Efficient CO2/CH4 Separation",

abstract = "Cation-free zirconosilicate zeolite CHA and thin zirconia-supported membranes were in situ synthesized in a fluoride-free gel for the first time. The usage of the ZrO2/Al2O3 composite support inhibited the transportation of aluminum from the support into zeolite membranes. No fluorite source was used for the synthesis of cation-free zeolite CHA membranes, indicating the green property of the synthesis. The thickness of the membrane was only 1.0 μm. The best cation-free zeolite CHA membrane prepared by the green in situ synthesis displayed a high CO2 permeance of 1.1 × 10-6 mol/(m2 s Pa) and CO2/CH4 selectivity of 79 at 298 K and 0.2 MPa pressure drop for an equimolar CO2/CH4 mixture.",

keywords = "CO capture, Si-CHA, in situ synthesis, natural gas sweetening, zeolite membranes",

author = "Nana Wang and Guiliu Dang and Zhenwei Bai and Qing Wang and Bo Liu and Rongfei Zhou and Weihong Xing",

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doi = "10.1021/acsami.2c21682",

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T1 - In Situ Synthesis of Cation-Free Zirconia-Supported Zeolite CHA Membranes for Efficient CO2/CH4 Separation

AU - Wang, Nana

AU - Dang, Guiliu

AU - Bai, Zhenwei

AU - Wang, Qing

AU - Liu, Bo

AU - Zhou, Rongfei

AU - Xing, Weihong

PY - 2023/4/5

Y1 - 2023/4/5

N2 - Cation-free zirconosilicate zeolite CHA and thin zirconia-supported membranes were in situ synthesized in a fluoride-free gel for the first time. The usage of the ZrO2/Al2O3 composite support inhibited the transportation of aluminum from the support into zeolite membranes. No fluorite source was used for the synthesis of cation-free zeolite CHA membranes, indicating the green property of the synthesis. The thickness of the membrane was only 1.0 μm. The best cation-free zeolite CHA membrane prepared by the green in situ synthesis displayed a high CO2 permeance of 1.1 × 10-6 mol/(m2 s Pa) and CO2/CH4 selectivity of 79 at 298 K and 0.2 MPa pressure drop for an equimolar CO2/CH4 mixture.

AB - Cation-free zirconosilicate zeolite CHA and thin zirconia-supported membranes were in situ synthesized in a fluoride-free gel for the first time. The usage of the ZrO2/Al2O3 composite support inhibited the transportation of aluminum from the support into zeolite membranes. No fluorite source was used for the synthesis of cation-free zeolite CHA membranes, indicating the green property of the synthesis. The thickness of the membrane was only 1.0 μm. The best cation-free zeolite CHA membrane prepared by the green in situ synthesis displayed a high CO2 permeance of 1.1 × 10-6 mol/(m2 s Pa) and CO2/CH4 selectivity of 79 at 298 K and 0.2 MPa pressure drop for an equimolar CO2/CH4 mixture.

KW - CO capture

KW - Si-CHA

KW - in situ synthesis

KW - natural gas sweetening

KW - zeolite membranes

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U2 - 10.1021/acsami.2c21682

DO - 10.1021/acsami.2c21682

M3 - 文章

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AN - SCOPUS:85151326653

SN - 1944-8244

VL - 15

SP - 16853

EP - 16864

JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

IS - 13

ER -

In Situ Synthesis of Cation-Free Zirconia-Supported Zeolite CHA Membranes for Efficient CO₂/CH₄ Separation

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Keywords

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