TY - JOUR
T1 - Effect of amine structure on CO2 adsorption of modified poly(ethyleneimine)-impregnated mesostructured silica sorbents
AU - Jo, Dong Hyun
AU - Jung, Hyunchul
AU - Jeon, Sunbin
AU - Kim, Sung Hyun
N1 - Funding Information:
This work was supported by the Korea CCS RandD Center (KCRC) grant funded by the Korea government (Ministry of Science, ICT and Future Planning) (No. NRF-2014M1A8A1049251).
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2016
Y1 - 2016
N2 - Poly(ethyleneimine) (PEI) was modified to investigate the effect of amine type and introduced hydroxy groups on its ability to capture CO2. Amines were impregnated in as-synthesized mesostructured silica (MSU-F) to fabricate solid amines, and the obtained samples were characterized. Nitrogen contents, structural properties, adsorption capacity, and sorbent durability during CO2 adsorption/desorption processes were determined to evaluate the CO2 sorption performances of the sorbents. Reaction between PEI and propylene oxide altered the ratio of primary, secondary, and tertiary amines, and also produced hydroxy groups on amine molecules. With a specific reactant ratio, a modified amine-impregnated sorbent (M-EP10) demonstrated a 13.90 wt. % and 0.37 CO2 adsorption capacity and amine efficiency, respectively, which were higher than that of the pristine PEI-impregnated sorbent. Also, the new adsorbents exhibited great stability in cyclic adsorption-desorption operations, even under pure CO2 desorption conditions in which commercial PEI adsorbents are known to lose CO2 adsorption capacity due to urea formation.
AB - Poly(ethyleneimine) (PEI) was modified to investigate the effect of amine type and introduced hydroxy groups on its ability to capture CO2. Amines were impregnated in as-synthesized mesostructured silica (MSU-F) to fabricate solid amines, and the obtained samples were characterized. Nitrogen contents, structural properties, adsorption capacity, and sorbent durability during CO2 adsorption/desorption processes were determined to evaluate the CO2 sorption performances of the sorbents. Reaction between PEI and propylene oxide altered the ratio of primary, secondary, and tertiary amines, and also produced hydroxy groups on amine molecules. With a specific reactant ratio, a modified amine-impregnated sorbent (M-EP10) demonstrated a 13.90 wt. % and 0.37 CO2 adsorption capacity and amine efficiency, respectively, which were higher than that of the pristine PEI-impregnated sorbent. Also, the new adsorbents exhibited great stability in cyclic adsorption-desorption operations, even under pure CO2 desorption conditions in which commercial PEI adsorbents are known to lose CO2 adsorption capacity due to urea formation.
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U2 - 10.1246/bcsj.20160286
DO - 10.1246/bcsj.20160286
M3 - Article
AN - SCOPUS:85003945976
SN - 0009-2673
VL - 89
SP - 1462
EP - 1469
JO - Bulletin of the Chemical Society of Japan
JF - Bulletin of the Chemical Society of Japan
IS - 12
ER -