Preparation of carbon molecular sieve membranes with remarkable CO2/CH4 selectivity for high-pressure natural gas sweetening

Linfeng Lei; Arne Lindbråthen; Xiangping Zhang; Evangelos P. Favvas; Marius Sandru; Magne Hillestad; Xuezhong He

doi:10.1016/j.memsci.2020.118529

Preparation of carbon molecular sieve membranes with remarkable CO₂/CH₄ selectivity for high-pressure natural gas sweetening

Linfeng Lei, Arne Lindbråthen, Xiangping Zhang, Evangelos P. Favvas, Marius Sandru, Magne Hillestad, Xuezhong He^*

^*Corresponding author for this work

Chemical Engineering

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

42 Scopus citations

Abstract

Carbon hollow fiber membranes (CHFMs) were fabricated based on cellulose hollow fiber precursors spun from a cellulose/ionic liquid system. By a thermal treatment on the precursors using a preheating process before carbonization, the micropores of the prepared CHFMs were tightened and thus resulting in highly selective carbon molecular sieve (CMS) membranes. By increasing the drying temperature from RT to 140 °C, the cellulose hollow fiber precursors show a substantial shrinkage, which results in a reduction of average pore size of the derived CHFMs from 6 to 4.9 Å. Although the narrowed micropore size causes the decrease of gas diffusion coefficient, stronger resistance to the larger gas molecules, such as CH₄, eventually results in an ultra-high CO₂/CH₄ ideal selectivity of 917 tested at 2 bar for CHFM-140C due to the simultaneously enhanced diffusion and sorption selectivity. The CHFM-140C was further tested with a 10 mol%CO₂/90 mol%CH₄ mixed gas at 60 °C and feed pressure ranging from 10 to 50 bar. The obtained remarkable CO₂/CH₄ separation factor of 131 at 50 bar and good stability make these carbon membranes great potential candidates for CO₂ removal from high-pressure natural gas.

Original language	English
Article number	118529
Journal	Journal of Membrane Science
Volume	614
DOIs	https://doi.org/10.1016/j.memsci.2020.118529
State	Published - 15 Nov 2020

Keywords

CO removal
Carbon hollow fiber membranes
Cellulose
Ionic liquids
Natural gas

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10.1016/j.memsci.2020.118529

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title = "Preparation of carbon molecular sieve membranes with remarkable CO2/CH4 selectivity for high-pressure natural gas sweetening",

abstract = "Carbon hollow fiber membranes (CHFMs) were fabricated based on cellulose hollow fiber precursors spun from a cellulose/ionic liquid system. By a thermal treatment on the precursors using a preheating process before carbonization, the micropores of the prepared CHFMs were tightened and thus resulting in highly selective carbon molecular sieve (CMS) membranes. By increasing the drying temperature from RT to 140 °C, the cellulose hollow fiber precursors show a substantial shrinkage, which results in a reduction of average pore size of the derived CHFMs from 6 to 4.9 {\AA}. Although the narrowed micropore size causes the decrease of gas diffusion coefficient, stronger resistance to the larger gas molecules, such as CH4, eventually results in an ultra-high CO2/CH4 ideal selectivity of 917 tested at 2 bar for CHFM-140C due to the simultaneously enhanced diffusion and sorption selectivity. The CHFM-140C was further tested with a 10 mol%CO2/90 mol%CH4 mixed gas at 60 °C and feed pressure ranging from 10 to 50 bar. The obtained remarkable CO2/CH4 separation factor of 131 at 50 bar and good stability make these carbon membranes great potential candidates for CO2 removal from high-pressure natural gas.",

keywords = "CO removal, Carbon hollow fiber membranes, Cellulose, Ionic liquids, Natural gas",

author = "Linfeng Lei and Arne Lindbr{\aa}then and Xiangping Zhang and Favvas, {Evangelos P.} and Marius Sandru and Magne Hillestad and Xuezhong He",

note = "Publisher Copyright: {\textcopyright} 2020 The Authors",

year = "2020",

month = nov,

day = "15",

doi = "10.1016/j.memsci.2020.118529",

language = "英语",

volume = "614",

journal = "Journal of Membrane Science",

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T1 - Preparation of carbon molecular sieve membranes with remarkable CO2/CH4 selectivity for high-pressure natural gas sweetening

AU - Lei, Linfeng

AU - Lindbråthen, Arne

AU - Zhang, Xiangping

AU - Favvas, Evangelos P.

AU - Sandru, Marius

AU - Hillestad, Magne

AU - He, Xuezhong

PY - 2020/11/15

Y1 - 2020/11/15

N2 - Carbon hollow fiber membranes (CHFMs) were fabricated based on cellulose hollow fiber precursors spun from a cellulose/ionic liquid system. By a thermal treatment on the precursors using a preheating process before carbonization, the micropores of the prepared CHFMs were tightened and thus resulting in highly selective carbon molecular sieve (CMS) membranes. By increasing the drying temperature from RT to 140 °C, the cellulose hollow fiber precursors show a substantial shrinkage, which results in a reduction of average pore size of the derived CHFMs from 6 to 4.9 Å. Although the narrowed micropore size causes the decrease of gas diffusion coefficient, stronger resistance to the larger gas molecules, such as CH4, eventually results in an ultra-high CO2/CH4 ideal selectivity of 917 tested at 2 bar for CHFM-140C due to the simultaneously enhanced diffusion and sorption selectivity. The CHFM-140C was further tested with a 10 mol%CO2/90 mol%CH4 mixed gas at 60 °C and feed pressure ranging from 10 to 50 bar. The obtained remarkable CO2/CH4 separation factor of 131 at 50 bar and good stability make these carbon membranes great potential candidates for CO2 removal from high-pressure natural gas.

AB - Carbon hollow fiber membranes (CHFMs) were fabricated based on cellulose hollow fiber precursors spun from a cellulose/ionic liquid system. By a thermal treatment on the precursors using a preheating process before carbonization, the micropores of the prepared CHFMs were tightened and thus resulting in highly selective carbon molecular sieve (CMS) membranes. By increasing the drying temperature from RT to 140 °C, the cellulose hollow fiber precursors show a substantial shrinkage, which results in a reduction of average pore size of the derived CHFMs from 6 to 4.9 Å. Although the narrowed micropore size causes the decrease of gas diffusion coefficient, stronger resistance to the larger gas molecules, such as CH4, eventually results in an ultra-high CO2/CH4 ideal selectivity of 917 tested at 2 bar for CHFM-140C due to the simultaneously enhanced diffusion and sorption selectivity. The CHFM-140C was further tested with a 10 mol%CO2/90 mol%CH4 mixed gas at 60 °C and feed pressure ranging from 10 to 50 bar. The obtained remarkable CO2/CH4 separation factor of 131 at 50 bar and good stability make these carbon membranes great potential candidates for CO2 removal from high-pressure natural gas.

KW - CO removal

KW - Carbon hollow fiber membranes

KW - Cellulose

KW - Ionic liquids

KW - Natural gas

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DO - 10.1016/j.memsci.2020.118529

M3 - 文章

AN - SCOPUS:85089224715

SN - 0376-7388

VL - 614

JO - Journal of Membrane Science

JF - Journal of Membrane Science

M1 - 118529

ER -

Preparation of carbon molecular sieve membranes with remarkable CO₂/CH₄ selectivity for high-pressure natural gas sweetening

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