化工学报2025，Vol.76Issue(5)：2304-2312,9.DOI:10.11949/0438-1157.20241213
用于CH4/N2分离的多吸附位点超微孔MOF
Ultramicroporous MOF with multiple adsorption sites for CH4/N2 separation
摘要
Abstract
The development of adsorbents for purifying methane(CH4)from unconventional natural gas is of great significance for the sustainable development of energy and environment.However,the physical and chemical properties of CH4 and N2 are extremely similar,making the design of high-performance adsorbents a daunting challenge.Herein,an ultra-microporous metal-organic framework(Ni-BZZA)was constructed using a low polarity aromatic imidazole ring ligand 1H-benzimidazole-5carboxylic acid for efficient separation of CH4/N2 mixtures.The pore surface of Ni-BZZA has dense nitrogen heterocycles and accessible oxygen atoms that can serve as strong binding sites for CH4.The ultramicroporous of Ni-BZZA provide strong constraints for CH4.The synergistic effect of pore size and pore surface chemistry results in excellent CH4 uptake(39.1 cm3·g-1)and CH4/N2(50/50,vol)selectivity(8.6)of Ni-BZZA at 298 K and 0.1 MPa.Breakthrough experiment conducted under simulated industrial conditions has confirmed that Ni-BZZA can efficiently separate CH4/N2 mixture.The excellent CH4 uptake and CH4/N2 selectivity of Ni-BZZA indicate its great potential for enriching CH4 in unconventional natural gas.关键词
金属有机框架/吸附剂/天然气/选择性/吸附/分离Key words
metal-organic framework/adsorbent/natural gas/selectivity/adsorption/separation分类
化学化工引用本文复制引用
郭彭涛,王婷,薛波,应允攀,刘大欢..用于CH4/N2分离的多吸附位点超微孔MOF[J].化工学报,2025,76(5):2304-2312,9.基金项目
国家重点研发计划项目(2021YFB3802200) （2021YFB3802200）
国家自然科学基金项目(22478015,22408014) （22478015,22408014）
中央高校基本科研业务费专项基金项目(QNYC232303,butrc202227) （QNYC232303,butrc202227）
