Development of carbon-based "molecular basket" sorbent for CO 2 capture

Dongxiang Wang, Xiaoliang Ma, Cigdem Sentorun-Shalaby, Chunshan Song

Research output: Contribution to journalArticle

73 Citations (Scopus)

Abstract

The objective of the present study is to develop a new type of "molecular basket" sorbent (MBS) by using inexpensive and commercially available carbon materials instead of mesoporous silica molecular sieves as supports for CO 2 capture from flue gas. Several commercial carbon materials, including activated carbons and carbon blacks, with different pore sizes and pore volumes have been used to prepare the carbon-based MBS (CB-MBS) by loading the CO 2-philic polyethylenimine (PEI) on them. The CO 2 sorption performance of the prepared CB-MBS was evaluated by using a thermogravimetric analyzer and a fixed-bed flow sorption system. Effects of the pore properties of the carbon supports, PEI loading amount, sorption temperature, and moisture on the sorption capacity were examined. A sorption capacity of 135 mg-CO 2/g-sorb was obtained by loading 50 wt % PEI on a carbon black, which is almost the same as that of PEI(50)/SBA-15 prepared by loading 50 wt % PEI on SBA-15. The higher CO 2 sorption capacity of 154 mg-CO 2/g-sorb was achieved when increasing the PEI loading on the carbon black to 65 wt %. Characterization of the porous structure of the carbon materials indicates that the high sorption capacity of the carbon-black- supported PEI sorbents can be ascribed to their high pore volume and large pore size. It was further found that the volume-based capacity of PEI(50)/C4 was even higher than that of PEI(50)/SBA-15 by 57% due to the higher packing density (0.35 g/mL) of the former than that (0.22 g/mL) of the latter. Because of its high CO 2 sorption performance and low preparation cost, the carbon-based MBS could be a promising sorbent for cost-efficient CO 2 capture from flue gas.

Original languageEnglish (US)
Pages (from-to)3048-3057
Number of pages10
JournalIndustrial and Engineering Chemistry Research
Volume51
Issue number7
DOIs
StatePublished - Feb 22 2012

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Polyethyleneimine
Carbon Monoxide
Sorbents
Sorption
Carbon
Soot
Carbon black
Flue gases
Pore size
Molecular sieves
Activated carbon
Costs
Silicon Dioxide
Moisture
Silica

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Cite this

Wang, Dongxiang ; Ma, Xiaoliang ; Sentorun-Shalaby, Cigdem ; Song, Chunshan. / Development of carbon-based "molecular basket" sorbent for CO 2 capture. In: Industrial and Engineering Chemistry Research. 2012 ; Vol. 51, No. 7. pp. 3048-3057.
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abstract = "The objective of the present study is to develop a new type of {"}molecular basket{"} sorbent (MBS) by using inexpensive and commercially available carbon materials instead of mesoporous silica molecular sieves as supports for CO 2 capture from flue gas. Several commercial carbon materials, including activated carbons and carbon blacks, with different pore sizes and pore volumes have been used to prepare the carbon-based MBS (CB-MBS) by loading the CO 2-philic polyethylenimine (PEI) on them. The CO 2 sorption performance of the prepared CB-MBS was evaluated by using a thermogravimetric analyzer and a fixed-bed flow sorption system. Effects of the pore properties of the carbon supports, PEI loading amount, sorption temperature, and moisture on the sorption capacity were examined. A sorption capacity of 135 mg-CO 2/g-sorb was obtained by loading 50 wt {\%} PEI on a carbon black, which is almost the same as that of PEI(50)/SBA-15 prepared by loading 50 wt {\%} PEI on SBA-15. The higher CO 2 sorption capacity of 154 mg-CO 2/g-sorb was achieved when increasing the PEI loading on the carbon black to 65 wt {\%}. Characterization of the porous structure of the carbon materials indicates that the high sorption capacity of the carbon-black- supported PEI sorbents can be ascribed to their high pore volume and large pore size. It was further found that the volume-based capacity of PEI(50)/C4 was even higher than that of PEI(50)/SBA-15 by 57{\%} due to the higher packing density (0.35 g/mL) of the former than that (0.22 g/mL) of the latter. Because of its high CO 2 sorption performance and low preparation cost, the carbon-based MBS could be a promising sorbent for cost-efficient CO 2 capture from flue gas.",
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Development of carbon-based "molecular basket" sorbent for CO 2 capture. / Wang, Dongxiang; Ma, Xiaoliang; Sentorun-Shalaby, Cigdem; Song, Chunshan.

In: Industrial and Engineering Chemistry Research, Vol. 51, No. 7, 22.02.2012, p. 3048-3057.

Research output: Contribution to journalArticle

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