Effect of thin hydrophobic films for toluene adsorption and desorption behavior on activated carbon fiber under dry and humid conditions

Kwang Dae Kim; Eun Ji Park; Hyun Ook Seo; Myung Geun Jeong; Young Dok Kim; Dong Chan Lim

doi:10.1016/j.cej.2012.06.044

Effect of thin hydrophobic films for toluene adsorption and desorption behavior on activated carbon fiber under dry and humid conditions

Kwang Dae Kim, Eun Ji Park, Hyun Ook Seo, Myung Geun Jeong, Young Dok Kim, Dong Chan Lim

Department of Chemistry

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

74 Scopus citations

Abstract

The toluene adsorption and desorption behavior of bare activated carbon fibers (ACFs) and those with a thin hydrophobic coating were studied. ACF surfaces were made hydrophobic by evaporating polydimethylsiloxane (PDMS) on AFCs under atmospheric pressure condition. In the breakthrough curve of bare-ACF for toluene under humid air condition, the roll-up phenomenon towards toluene adsorption was observed. This was attributed to the substitution of the adsorbed toluene by water on ACF, leading to a rise of outlet concentration above the inlet concentration with a decrease in the amount of adsorbed toluene. Compared to bare-ACF, a superior selectivity and adsorption capacity for toluene was observed on the ACFs coated with PDMS. It is suggested that the PDMS-coating can increase the removal efficiency of ACF for toluene under humid air condition.

Original language	English
Pages (from-to)	133-139
Number of pages	7
Journal	Chemical Engineering Journal
Volume	200-202
DOIs	https://doi.org/10.1016/j.cej.2012.06.044
State	Published - 15 Aug 2012

Keywords

Activated carbon fiber
Hydrophobic coating
Selectivity
Toluene adsorption
Volatile organic compounds

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10.1016/j.cej.2012.06.044

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title = "Effect of thin hydrophobic films for toluene adsorption and desorption behavior on activated carbon fiber under dry and humid conditions",

abstract = "The toluene adsorption and desorption behavior of bare activated carbon fibers (ACFs) and those with a thin hydrophobic coating were studied. ACF surfaces were made hydrophobic by evaporating polydimethylsiloxane (PDMS) on AFCs under atmospheric pressure condition. In the breakthrough curve of bare-ACF for toluene under humid air condition, the roll-up phenomenon towards toluene adsorption was observed. This was attributed to the substitution of the adsorbed toluene by water on ACF, leading to a rise of outlet concentration above the inlet concentration with a decrease in the amount of adsorbed toluene. Compared to bare-ACF, a superior selectivity and adsorption capacity for toluene was observed on the ACFs coated with PDMS. It is suggested that the PDMS-coating can increase the removal efficiency of ACF for toluene under humid air condition.",

keywords = "Activated carbon fiber, Hydrophobic coating, Selectivity, Toluene adsorption, Volatile organic compounds",

author = "Kim, \{Kwang Dae\} and Park, \{Eun Ji\} and Seo, \{Hyun Ook\} and Jeong, \{Myung Geun\} and Kim, \{Young Dok\} and Lim, \{Dong Chan\}",

year = "2012",

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day = "15",

doi = "10.1016/j.cej.2012.06.044",

language = "English",

volume = "200-202",

pages = "133--139",

journal = "Chemical Engineering Journal",

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TY - JOUR

T1 - Effect of thin hydrophobic films for toluene adsorption and desorption behavior on activated carbon fiber under dry and humid conditions

AU - Kim, Kwang Dae

AU - Park, Eun Ji

AU - Seo, Hyun Ook

AU - Jeong, Myung Geun

AU - Kim, Young Dok

AU - Lim, Dong Chan

PY - 2012/8/15

Y1 - 2012/8/15

N2 - The toluene adsorption and desorption behavior of bare activated carbon fibers (ACFs) and those with a thin hydrophobic coating were studied. ACF surfaces were made hydrophobic by evaporating polydimethylsiloxane (PDMS) on AFCs under atmospheric pressure condition. In the breakthrough curve of bare-ACF for toluene under humid air condition, the roll-up phenomenon towards toluene adsorption was observed. This was attributed to the substitution of the adsorbed toluene by water on ACF, leading to a rise of outlet concentration above the inlet concentration with a decrease in the amount of adsorbed toluene. Compared to bare-ACF, a superior selectivity and adsorption capacity for toluene was observed on the ACFs coated with PDMS. It is suggested that the PDMS-coating can increase the removal efficiency of ACF for toluene under humid air condition.

AB - The toluene adsorption and desorption behavior of bare activated carbon fibers (ACFs) and those with a thin hydrophobic coating were studied. ACF surfaces were made hydrophobic by evaporating polydimethylsiloxane (PDMS) on AFCs under atmospheric pressure condition. In the breakthrough curve of bare-ACF for toluene under humid air condition, the roll-up phenomenon towards toluene adsorption was observed. This was attributed to the substitution of the adsorbed toluene by water on ACF, leading to a rise of outlet concentration above the inlet concentration with a decrease in the amount of adsorbed toluene. Compared to bare-ACF, a superior selectivity and adsorption capacity for toluene was observed on the ACFs coated with PDMS. It is suggested that the PDMS-coating can increase the removal efficiency of ACF for toluene under humid air condition.

KW - Activated carbon fiber

KW - Hydrophobic coating

KW - Selectivity

KW - Toluene adsorption

KW - Volatile organic compounds

UR - https://www.scopus.com/pages/publications/84865562166

U2 - 10.1016/j.cej.2012.06.044

DO - 10.1016/j.cej.2012.06.044

M3 - Article

AN - SCOPUS:84865562166

SN - 1385-8947

VL - 200-202

SP - 133

EP - 139

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

ER -

Effect of thin hydrophobic films for toluene adsorption and desorption behavior on activated carbon fiber under dry and humid conditions

Abstract

Keywords

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