Development of a new clay supported polyethylenimine composite for CO2 capture

Weilong Wang, Jing Xiao, Xiaolan Wei, Jing Ding, Xiaoxing Wang, Chunshan Song

Research output: Contribution to journalArticle

81 Citations (Scopus)

Abstract

A new inexpensive inorganic-organic composite sorbent for CO2 capture was prepared by the immobilization of a branched polyethyleneimine (PEI) onto porosity-enhanced clays using the wet impregnation method. In the composite, a low cost and naturally abundant clays (e.g. kaolinite and montmorillonite) was used as the supporting material, which was pre-modified by acid- or alkaline-treatment to improve its textural properties, i.e. pore volume and surface area, for accommodating the CO2-philic PEI. Among the modified clays, the montmorillonite modified by 6M HCl (Mon_HCl_6M) showed the highest porosity with the pore volume of 0.71cm3/g from 0.16cm3/g, and BET surface area of 253m2/g from 72m2/g. The cost of the Mon_HCl_6M was estimated as $0.14/kg, which was significantly lower than reported supporting materials for the amine-based sorbents for CO2 capture. At the optimal PEI loading of 50 wt% on the Mon_HCl_6M support, the CO2 sorption capacity reached 112mg CO2/g-sorbent at 75°C under dry condition, which can be further enhanced to 142mg CO2/g-sorbent with the moisture addition (ca. 3vol%) due to the change in the interaction mechanism between CO2 and amine in the presence of moisture. Moreover, the PEI/Mon_HCl_6M sorbent showed a good regenerability for 10 sorption-desorption cycles tested and a good thermal stability in the temperature range of CO2 sorption (75°C) and desorption (100°C).

Original languageEnglish (US)
Pages (from-to)334-341
Number of pages8
JournalApplied Energy
Volume113
DOIs
StatePublished - Jan 1 2014

Fingerprint

Sorbents
Clay
sorption
montmorillonite
clay
desorption
Composite materials
Sorption
surface area
porosity
moisture
Clay minerals
Amines
Desorption
cost
Moisture
immobilization
Porosity
kaolinite
Kaolinite

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Energy(all)

Cite this

Wang, Weilong ; Xiao, Jing ; Wei, Xiaolan ; Ding, Jing ; Wang, Xiaoxing ; Song, Chunshan. / Development of a new clay supported polyethylenimine composite for CO2 capture. In: Applied Energy. 2014 ; Vol. 113. pp. 334-341.
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abstract = "A new inexpensive inorganic-organic composite sorbent for CO2 capture was prepared by the immobilization of a branched polyethyleneimine (PEI) onto porosity-enhanced clays using the wet impregnation method. In the composite, a low cost and naturally abundant clays (e.g. kaolinite and montmorillonite) was used as the supporting material, which was pre-modified by acid- or alkaline-treatment to improve its textural properties, i.e. pore volume and surface area, for accommodating the CO2-philic PEI. Among the modified clays, the montmorillonite modified by 6M HCl (Mon_HCl_6M) showed the highest porosity with the pore volume of 0.71cm3/g from 0.16cm3/g, and BET surface area of 253m2/g from 72m2/g. The cost of the Mon_HCl_6M was estimated as $0.14/kg, which was significantly lower than reported supporting materials for the amine-based sorbents for CO2 capture. At the optimal PEI loading of 50 wt{\%} on the Mon_HCl_6M support, the CO2 sorption capacity reached 112mg CO2/g-sorbent at 75°C under dry condition, which can be further enhanced to 142mg CO2/g-sorbent with the moisture addition (ca. 3vol{\%}) due to the change in the interaction mechanism between CO2 and amine in the presence of moisture. Moreover, the PEI/Mon_HCl_6M sorbent showed a good regenerability for 10 sorption-desorption cycles tested and a good thermal stability in the temperature range of CO2 sorption (75°C) and desorption (100°C).",
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Development of a new clay supported polyethylenimine composite for CO2 capture. / Wang, Weilong; Xiao, Jing; Wei, Xiaolan; Ding, Jing; Wang, Xiaoxing; Song, Chunshan.

In: Applied Energy, Vol. 113, 01.01.2014, p. 334-341.

Research output: Contribution to journalArticle

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T1 - Development of a new clay supported polyethylenimine composite for CO2 capture

AU - Wang, Weilong

AU - Xiao, Jing

AU - Wei, Xiaolan

AU - Ding, Jing

AU - Wang, Xiaoxing

AU - Song, Chunshan

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