Silica/polyethyleneimine composite adsorbent S-PEI for CO2 capture by vacuum swing adsorption (VSA)

Gregory P. Knowles, Paul A. Webley, Zhijian Liang, Alan L. Chaffee

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

14 Citations (Scopus)

Abstract

SBA15 type mesoporous silica was combined with a pore volume equivalent of branched polyethyleneimine PEI (MW 1200) to prepare a high capacity adsorbent S-PEI for the selective capture of CO2 from post combustion flue gas via pressure / vacuum swing adsorption (VSA). The adsorbent was characterized by helium pycnometry, N2 adsorption / desorption at 77 K, powder X-ray diffraction XRD and thermogravimetric analysis. The potential of S-PEI for CO2 capture via VSA was assessed by both CO2 partial pressure swing adsorption (PPSA) studies via combined thermogravimetric analysis (TGA) / differential thermal analysis (DTA), and by CO2 pressure / vacuum swing adsorption (VSA) studies via a custom bench gas sorption analyzer. The CO2 sorption capacities determined by partial pressure swings were consistent with those determined by pressure / vacuum swings as expected by the Henry gas law and therefore demonstrate the validity of PPSA to estimate VSA process working capacities. S-PEI was found to exhibit greater working CO2 capacity than zeolite 13X at 105 °C under key process conditions (0.05 - 0.15 atm CO2) from either anhydrous or humidified (̃1 % H2O) process gas. The amine adsorbent was also found to exhibit a higher Hads(CO2) (70-90 kJ.mol-1 than zeolite 13X (30-40 kJ.mol-1) as was expected for a chemisorption process. Zeolite 13X however was found to exhibit faster sorption kinetics under anhydrous process conditions consistent with its lower Hads(CO 2). Pelletized S-PEI exhibited the same good sorption kinetics as the powder, however with slightly reduced CO2 working capacity, 2.5 wt% at 105 °C, and minimal void volume, equivalent to 29.3 g of CO2 per L of sorbent bed. S-PEI was thus found to be attractive for CO2 capture from post combustion flue gas via VSA.

Original languageEnglish
Title of host publicationRecent Advances in Post-Combustion CO2 Capture Chemistry
EditorsMoetaz I Attalla
Place of PublicationWashington DC USA
PublisherAmerican Chemical Society
Chapter9
Pages177-205
Number of pages29
Volume1097
ISBN (Print)9780841226210
DOIs
Publication statusPublished - 2012
EventSymposium at the International Chemical Congress of Pacific Basin Societies (Pacifichem) 2010 - Hawaii Convention Center, Honolulu, United States of America
Duration: 15 Dec 201020 Dec 2010
Conference number: 6th
https://web.archive.org/web/20100209011950/http://pacifichem.org:80/

Publication series

NameACS Symposium Series
Volume1097
ISSN (Print)00976156
ISSN (Electronic)19475918

Conference

ConferenceSymposium at the International Chemical Congress of Pacific Basin Societies (Pacifichem) 2010
Abbreviated titlePacifichem 2010
CountryUnited States of America
CityHonolulu
Period15/12/1020/12/10
Internet address

Cite this

Knowles, G. P., Webley, P. A., Liang, Z., & Chaffee, A. L. (2012). Silica/polyethyleneimine composite adsorbent S-PEI for CO2 capture by vacuum swing adsorption (VSA). In M. I. Attalla (Ed.), Recent Advances in Post-Combustion CO2 Capture Chemistry (Vol. 1097, pp. 177-205). (ACS Symposium Series; Vol. 1097). Washington DC USA: American Chemical Society. https://doi.org/10.1021/bk-2012-1097.ch009
Knowles, Gregory P. ; Webley, Paul A. ; Liang, Zhijian ; Chaffee, Alan L. / Silica/polyethyleneimine composite adsorbent S-PEI for CO2 capture by vacuum swing adsorption (VSA). Recent Advances in Post-Combustion CO2 Capture Chemistry. editor / Moetaz I Attalla. Vol. 1097 Washington DC USA : American Chemical Society, 2012. pp. 177-205 (ACS Symposium Series).
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title = "Silica/polyethyleneimine composite adsorbent S-PEI for CO2 capture by vacuum swing adsorption (VSA)",
abstract = "SBA15 type mesoporous silica was combined with a pore volume equivalent of branched polyethyleneimine PEI (MW 1200) to prepare a high capacity adsorbent S-PEI for the selective capture of CO2 from post combustion flue gas via pressure / vacuum swing adsorption (VSA). The adsorbent was characterized by helium pycnometry, N2 adsorption / desorption at 77 K, powder X-ray diffraction XRD and thermogravimetric analysis. The potential of S-PEI for CO2 capture via VSA was assessed by both CO2 partial pressure swing adsorption (PPSA) studies via combined thermogravimetric analysis (TGA) / differential thermal analysis (DTA), and by CO2 pressure / vacuum swing adsorption (VSA) studies via a custom bench gas sorption analyzer. The CO2 sorption capacities determined by partial pressure swings were consistent with those determined by pressure / vacuum swings as expected by the Henry gas law and therefore demonstrate the validity of PPSA to estimate VSA process working capacities. S-PEI was found to exhibit greater working CO2 capacity than zeolite 13X at 105 °C under key process conditions (0.05 - 0.15 atm CO2) from either anhydrous or humidified (̃1 {\%} H2O) process gas. The amine adsorbent was also found to exhibit a higher Hads(CO2) (70-90 kJ.mol-1 than zeolite 13X (30-40 kJ.mol-1) as was expected for a chemisorption process. Zeolite 13X however was found to exhibit faster sorption kinetics under anhydrous process conditions consistent with its lower Hads(CO 2). Pelletized S-PEI exhibited the same good sorption kinetics as the powder, however with slightly reduced CO2 working capacity, 2.5 wt{\%} at 105 °C, and minimal void volume, equivalent to 29.3 g of CO2 per L of sorbent bed. S-PEI was thus found to be attractive for CO2 capture from post combustion flue gas via VSA.",
author = "Knowles, {Gregory P.} and Webley, {Paul A.} and Zhijian Liang and Chaffee, {Alan L.}",
year = "2012",
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Knowles, GP, Webley, PA, Liang, Z & Chaffee, AL 2012, Silica/polyethyleneimine composite adsorbent S-PEI for CO2 capture by vacuum swing adsorption (VSA). in MI Attalla (ed.), Recent Advances in Post-Combustion CO2 Capture Chemistry. vol. 1097, ACS Symposium Series, vol. 1097, American Chemical Society, Washington DC USA, pp. 177-205, Symposium at the International Chemical Congress of Pacific Basin Societies (Pacifichem) 2010, Honolulu, United States of America, 15/12/10. https://doi.org/10.1021/bk-2012-1097.ch009

Silica/polyethyleneimine composite adsorbent S-PEI for CO2 capture by vacuum swing adsorption (VSA). / Knowles, Gregory P.; Webley, Paul A.; Liang, Zhijian; Chaffee, Alan L.

Recent Advances in Post-Combustion CO2 Capture Chemistry. ed. / Moetaz I Attalla. Vol. 1097 Washington DC USA : American Chemical Society, 2012. p. 177-205 (ACS Symposium Series; Vol. 1097).

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

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T1 - Silica/polyethyleneimine composite adsorbent S-PEI for CO2 capture by vacuum swing adsorption (VSA)

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N2 - SBA15 type mesoporous silica was combined with a pore volume equivalent of branched polyethyleneimine PEI (MW 1200) to prepare a high capacity adsorbent S-PEI for the selective capture of CO2 from post combustion flue gas via pressure / vacuum swing adsorption (VSA). The adsorbent was characterized by helium pycnometry, N2 adsorption / desorption at 77 K, powder X-ray diffraction XRD and thermogravimetric analysis. The potential of S-PEI for CO2 capture via VSA was assessed by both CO2 partial pressure swing adsorption (PPSA) studies via combined thermogravimetric analysis (TGA) / differential thermal analysis (DTA), and by CO2 pressure / vacuum swing adsorption (VSA) studies via a custom bench gas sorption analyzer. The CO2 sorption capacities determined by partial pressure swings were consistent with those determined by pressure / vacuum swings as expected by the Henry gas law and therefore demonstrate the validity of PPSA to estimate VSA process working capacities. S-PEI was found to exhibit greater working CO2 capacity than zeolite 13X at 105 °C under key process conditions (0.05 - 0.15 atm CO2) from either anhydrous or humidified (̃1 % H2O) process gas. The amine adsorbent was also found to exhibit a higher Hads(CO2) (70-90 kJ.mol-1 than zeolite 13X (30-40 kJ.mol-1) as was expected for a chemisorption process. Zeolite 13X however was found to exhibit faster sorption kinetics under anhydrous process conditions consistent with its lower Hads(CO 2). Pelletized S-PEI exhibited the same good sorption kinetics as the powder, however with slightly reduced CO2 working capacity, 2.5 wt% at 105 °C, and minimal void volume, equivalent to 29.3 g of CO2 per L of sorbent bed. S-PEI was thus found to be attractive for CO2 capture from post combustion flue gas via VSA.

AB - SBA15 type mesoporous silica was combined with a pore volume equivalent of branched polyethyleneimine PEI (MW 1200) to prepare a high capacity adsorbent S-PEI for the selective capture of CO2 from post combustion flue gas via pressure / vacuum swing adsorption (VSA). The adsorbent was characterized by helium pycnometry, N2 adsorption / desorption at 77 K, powder X-ray diffraction XRD and thermogravimetric analysis. The potential of S-PEI for CO2 capture via VSA was assessed by both CO2 partial pressure swing adsorption (PPSA) studies via combined thermogravimetric analysis (TGA) / differential thermal analysis (DTA), and by CO2 pressure / vacuum swing adsorption (VSA) studies via a custom bench gas sorption analyzer. The CO2 sorption capacities determined by partial pressure swings were consistent with those determined by pressure / vacuum swings as expected by the Henry gas law and therefore demonstrate the validity of PPSA to estimate VSA process working capacities. S-PEI was found to exhibit greater working CO2 capacity than zeolite 13X at 105 °C under key process conditions (0.05 - 0.15 atm CO2) from either anhydrous or humidified (̃1 % H2O) process gas. The amine adsorbent was also found to exhibit a higher Hads(CO2) (70-90 kJ.mol-1 than zeolite 13X (30-40 kJ.mol-1) as was expected for a chemisorption process. Zeolite 13X however was found to exhibit faster sorption kinetics under anhydrous process conditions consistent with its lower Hads(CO 2). Pelletized S-PEI exhibited the same good sorption kinetics as the powder, however with slightly reduced CO2 working capacity, 2.5 wt% at 105 °C, and minimal void volume, equivalent to 29.3 g of CO2 per L of sorbent bed. S-PEI was thus found to be attractive for CO2 capture from post combustion flue gas via VSA.

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BT - Recent Advances in Post-Combustion CO2 Capture Chemistry

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Knowles GP, Webley PA, Liang Z, Chaffee AL. Silica/polyethyleneimine composite adsorbent S-PEI for CO2 capture by vacuum swing adsorption (VSA). In Attalla MI, editor, Recent Advances in Post-Combustion CO2 Capture Chemistry. Vol. 1097. Washington DC USA: American Chemical Society. 2012. p. 177-205. (ACS Symposium Series). https://doi.org/10.1021/bk-2012-1097.ch009