文献类型：期刊文献

英文题名：Facile preparation of N and O-rich porous carbon from palm sheath for highly selective separation of CO2/CH4/N2 gas-mixture

作者：Liu, Fan[1];Zhang, Yan[2];Zhang, Peixin[3];Xu, Mai[4];Tan, Ting[1];Wang, Jun[3];Deng, Qiang[3];Zhang, Lingyi[5];Wan, Yiqun[1];Deng, Shuguang[4]

机构：[1]Nanchang Univ, Jiangxi Prov Key Lab Modern Analyt Sci, Nanchang 330031, Jiangxi, Peoples R China;[2]Jiangxi Univ Tradit Chinese Med, Nanchang 330031, Jiangxi, Peoples R China;[3]Nanchang Univ, Sch Resource Environm & Chem Engn, Nanchang 330031, Jiangxi, Peoples R China;[4]Arizona State Univ, Sch Engn Matter Transport & Energy, 551 E Tyler Mall, Tempe, AZ 85287 USA;[5]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China

年份：2020

卷号：399

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20202408833588);WOS:【SCI-EXPANDED(收录号:WOS:000572062200007)】；

基金：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.

语种：英文

外文关键词：Palm sheath; N and O-rich porous carbon; Adsorption; Gas separation

摘要：Novel N- and O-rich porous carbons were facilely prepared by one step NaNH2 activation of palm sheath at 350-550 degrees C for the highly selective separation of CO2/N-2, CO2/CH4, and CH4/N-2. 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 ultramicropore (< 0.9 nm) dominated the CO2 and CH4 adsorption at the pressure of 1.0 bar, while both ultramicropores 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 m(2)/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/N-2, CO2/CH4, and CH4/N-2 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/N-2, CO2/CH4, and CH4/N-2 separation.