TY - JOUR
T1 - Facile preparation of N and O-rich porous carbon from palm sheath for highly selective separation of CO2/CH4/N2 gas-mixture
AU - Liu, Fan
AU - Zhang, Yan
AU - Zhang, Peixin
AU - Xu, Mai
AU - Tan, Ting
AU - Wang, Jun
AU - Deng, Qiang
AU - Zhang, Lingyi
AU - Wan, Yiqun
AU - Deng, Shuguang
N1 - Funding Information:
This work is financially supported by the Natural Science Foundation of P.R. China (No: 31660483 ), Science and Technology Innovation Platform Project of Jiangxi Province (20192BCD40001), the Science and Technology Program of Jiangxi Province (20181BBG78017), Education Department of Jiangxi Province (GJJ160208). Fan Liu acknowledges CSC China for supporting his visit to Arizona State University.
Funding Information:
This work is financially supported by the Natural Science Foundation of P.R. China (No: 31660483), Science and Technology Innovation Platform Project of Jiangxi Province (20192BCD40001), the Science and Technology Program of Jiangxi Province (20181BBG78017), Education Department of Jiangxi Province (GJJ160208). Fan Liu acknowledges CSC China for supporting his visit to Arizona State University.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/11/1
Y1 - 2020/11/1
N2 - Novel N- and O-rich porous carbons were facilely prepared by one step NaNH2 activation of palm sheath at 350–550 °C for the highly selective separation of CO2/N2, CO2/CH4, and CH4/N2. The biomass of palm sheath was used as the precursor. The BET surface area, pore size distribution, and polar functional groups (O&N) ratio could be easily tailored by changing the activation temperature or NaNH2/biomass ratio. The co-effect of O&N and the effect of microporous structure on gas adsorption and separation were investigated, indicating the ultra-micropore (<0.9 nm) dominated the CO2 and CH4 adsorption at the pressure of 1.0 bar, while both ultra-micropores and heteroatoms (O&N) affected CO2 and CH4 adsorption capacities at the low-pressure range (<0.15 bar) as well as the gas separation performance. The obtained porous carbon adsorbents exhibited a large BET surface area (up to 2181 m2/g), narrow pore size distribution, and abundant polar groups (O&N). Due to the high surface area and ultra-micropores, as well as moderate polar group ratio, the as-prepared porous carbon exhibited excellent CO2/N2, CO2/CH4, and CH4/N2 selectivities of 107, 10.7, and 7.6 at 298 K and 1.0 bar, respectively. The carbons also showed outstanding CO2 and CH4 uptakes. Furthermore, the breakthrough and regeneration experiments further confirmed their feasibility as promising adsorbents for CO2/N2, CO2/CH4, and CH4/N2 separation.
AB - Novel N- and O-rich porous carbons were facilely prepared by one step NaNH2 activation of palm sheath at 350–550 °C for the highly selective separation of CO2/N2, CO2/CH4, and CH4/N2. The biomass of palm sheath was used as the precursor. The BET surface area, pore size distribution, and polar functional groups (O&N) ratio could be easily tailored by changing the activation temperature or NaNH2/biomass ratio. The co-effect of O&N and the effect of microporous structure on gas adsorption and separation were investigated, indicating the ultra-micropore (<0.9 nm) dominated the CO2 and CH4 adsorption at the pressure of 1.0 bar, while both ultra-micropores and heteroatoms (O&N) affected CO2 and CH4 adsorption capacities at the low-pressure range (<0.15 bar) as well as the gas separation performance. The obtained porous carbon adsorbents exhibited a large BET surface area (up to 2181 m2/g), narrow pore size distribution, and abundant polar groups (O&N). Due to the high surface area and ultra-micropores, as well as moderate polar group ratio, the as-prepared porous carbon exhibited excellent CO2/N2, CO2/CH4, and CH4/N2 selectivities of 107, 10.7, and 7.6 at 298 K and 1.0 bar, respectively. The carbons also showed outstanding CO2 and CH4 uptakes. Furthermore, the breakthrough and regeneration experiments further confirmed their feasibility as promising adsorbents for CO2/N2, CO2/CH4, and CH4/N2 separation.
KW - Adsorption
KW - Gas separation
KW - N and O-rich porous carbon
KW - Palm sheath
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U2 - 10.1016/j.cej.2020.125812
DO - 10.1016/j.cej.2020.125812
M3 - Article
AN - SCOPUS:85086342364
SN - 1385-8947
VL - 399
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 125812
ER -