Surface Functionalization of Activated Carbon with Phosphonium Ionic Liquid for CO<sub>2</sub> Adsorption

Surface Functionalization of Activated Carbon with Phosphonium Ionic Liquid for CO<sub>2</sub> Adsorption

Immobilization of phosphonium ionic liquid (IL) onto activated carbon (AC) was synthesized via grafting and impregnated methods, and the modified materials were analyzed via Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction, thermal gravity analysis, scanning electron microscope, por...

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Main Authors: Xiaodong He, Jiamei Zhu, Hongmin Wang, Min Zhou, Shuangquan Zhang
Format: Article
Language:English
Published: MDPI AG 2019-09-01
Series:Coatings
Subjects:
activated carbon
ionic liquid coating
adsorption
surface modification
Online Access:https://www.mdpi.com/2079-6412/9/9/590
id doaj-c5cc5d8e99884268b7f7ee30b3f9d90e
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spelling doaj-c5cc5d8e99884268b7f7ee30b3f9d90e2020-11-25T01:46:36ZengMDPI AGCoatings2079-64122019-09-019959010.3390/coatings9090590coatings9090590Surface Functionalization of Activated Carbon with Phosphonium Ionic Liquid for CO<sub>2</sub> AdsorptionXiaodong He0Jiamei Zhu1Hongmin Wang2Min Zhou3Shuangquan Zhang4School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, ChinaSchool of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, ChinaSchool of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, ChinaSchool of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, ChinaSchool of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, ChinaImmobilization of phosphonium ionic liquid (IL) onto activated carbon (AC) was synthesized via grafting and impregnated methods, and the modified materials were analyzed via Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction, thermal gravity analysis, scanning electron microscope, pore structure and CO<sub>2</sub>/N<sub>2</sub> adsorption selectivity. The effect of the gas flow rate (100&#8722;500 mL/min) and adsorption pressure (0.2&#8722;0.6 MPa) on the dynamic adsorption behavior of mixture gas containing 15 vol.% CO<sub>2</sub> and 85 vol.% N<sub>2</sub> was explained using a breakthrough method. By analyzing the breakthrough curves, the adsorption capacity was determined. The results show that surface functionalization of activated carbon with phosphonium ionic liquid is conducive to improving CO<sub>2</sub>/N<sub>2</sub> selectivity, especially ionic liquid-impregnated film. The different adsorption behaviors of impregnated and grafted adsorbents are observed under various conditions. The grafted AC had better CO<sub>2</sub> adsorption and mass transfer due to a lower blockage of pores by ionic liquid.https://www.mdpi.com/2079-6412/9/9/590activated carbonionic liquid coatingadsorptionsurface modification
collection DOAJ
language English
format Article
sources DOAJ
author Xiaodong He
Jiamei Zhu
Hongmin Wang
Min Zhou
Shuangquan Zhang
spellingShingle Xiaodong He
Jiamei Zhu
Hongmin Wang
Min Zhou
Shuangquan Zhang
Surface Functionalization of Activated Carbon with Phosphonium Ionic Liquid for CO<sub>2</sub> Adsorption
Coatings
activated carbon
ionic liquid coating
adsorption
surface modification
author_facet Xiaodong He
Jiamei Zhu
Hongmin Wang
Min Zhou
Shuangquan Zhang
author_sort Xiaodong He
title Surface Functionalization of Activated Carbon with Phosphonium Ionic Liquid for CO<sub>2</sub> Adsorption
title_short Surface Functionalization of Activated Carbon with Phosphonium Ionic Liquid for CO<sub>2</sub> Adsorption
title_full Surface Functionalization of Activated Carbon with Phosphonium Ionic Liquid for CO<sub>2</sub> Adsorption
title_fullStr Surface Functionalization of Activated Carbon with Phosphonium Ionic Liquid for CO<sub>2</sub> Adsorption
title_full_unstemmed Surface Functionalization of Activated Carbon with Phosphonium Ionic Liquid for CO<sub>2</sub> Adsorption
title_sort surface functionalization of activated carbon with phosphonium ionic liquid for co<sub>2</sub> adsorption
publisher MDPI AG
series Coatings
issn 2079-6412
publishDate 2019-09-01
description Immobilization of phosphonium ionic liquid (IL) onto activated carbon (AC) was synthesized via grafting and impregnated methods, and the modified materials were analyzed via Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction, thermal gravity analysis, scanning electron microscope, pore structure and CO<sub>2</sub>/N<sub>2</sub> adsorption selectivity. The effect of the gas flow rate (100&#8722;500 mL/min) and adsorption pressure (0.2&#8722;0.6 MPa) on the dynamic adsorption behavior of mixture gas containing 15 vol.% CO<sub>2</sub> and 85 vol.% N<sub>2</sub> was explained using a breakthrough method. By analyzing the breakthrough curves, the adsorption capacity was determined. The results show that surface functionalization of activated carbon with phosphonium ionic liquid is conducive to improving CO<sub>2</sub>/N<sub>2</sub> selectivity, especially ionic liquid-impregnated film. The different adsorption behaviors of impregnated and grafted adsorbents are observed under various conditions. The grafted AC had better CO<sub>2</sub> adsorption and mass transfer due to a lower blockage of pores by ionic liquid.
topic activated carbon
ionic liquid coating
adsorption
surface modification
url https://www.mdpi.com/2079-6412/9/9/590
work_keys_str_mv AT xiaodonghe surfacefunctionalizationofactivatedcarbonwithphosphoniumionicliquidforcosub2subadsorption
AT jiameizhu surfacefunctionalizationofactivatedcarbonwithphosphoniumionicliquidforcosub2subadsorption
AT hongminwang surfacefunctionalizationofactivatedcarbonwithphosphoniumionicliquidforcosub2subadsorption
AT minzhou surfacefunctionalizationofactivatedcarbonwithphosphoniumionicliquidforcosub2subadsorption
AT shuangquanzhang surfacefunctionalizationofactivatedcarbonwithphosphoniumionicliquidforcosub2subadsorption
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