High storage capacity and separation selectivity for C2 hydrocarbons over methane in the metal-organic framework Cu-TDPAT

被引:99
作者
Liu, Kang [1 ]
Ma, Dingxuan [1 ]
Li, Baiyan [1 ]
Li, Yi [1 ]
Yao, Kexin [2 ]
Zhang, Zhijuan [3 ]
Han, Yu [2 ]
Shi, Zhan [1 ]
机构
[1] Jilin Univ, State Key Lab Inorgan Synth & Preparat Chem, Coll Chem, Changchun 130012, Peoples R China
[2] King Abdullah Univ Sci & Technol, Adv Membranes & Porous Mat Ctr, Chem & Life Sci & Engn Div, Thuwal 239556900, Saudi Arabia
[3] Jinan Univ, Inst Atmospher Environm Safety & Pollut Control, Jinan 510632, Peoples R China
基金
中国国家自然科学基金; 国家高技术研究发展计划(863计划);
关键词
BASIC PYRIDYL SITES; CARBON-DIOXIDE CAPTURE; TOPOLOGY HIGH CO2; GAS SEPARATION; COMMENSURATE ADSORPTION; ACETYLENE STORAGE; HYDROGEN STORAGE; BUILDING-BLOCKS; MOF; ETHYLENE;
D O I
10.1039/c4ta03656e
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We report on the storage capacity and separation selectivity of an rht-type metal-organic framework, Cu-TDPAT [TDPAT = 2,4,6-tris(3,5-dicarboxylphenylamino)-1,3,5-triazine], for C-2 hydrocarbons over CH4. Henry's constant, the isosteric heat of adsorption and the ideal adsorbed solution theory selectivity were calculated based on single-component sorption isotherms. Theoretical calculations indicate that both the open metal sites and the Lewis basic sites have strong interactions with the C-2 molecules. The combination of these two kinds of sites lead to the highest C2H2-CH4 selectivity of 127.1 as well as record high values for C2H4 adsorption enthalpies. To mimic real-world conditions, breakthrough experiments were conducted on an equimolar four-component mixture containing C2H2, C2H4, C2H6 and CH4 at room temperature and 1 atm pressure. Our results show that Cu-TDPAT is a promising candidate for CH4 capture and purification.
引用
收藏
页码:15823 / 15828
页数:6
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