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

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2014年 / 2卷 / 38期

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

页码：15823 / 15828

页数：6

共 82 条

[71] A microporous metal-organic framework with both open metal and Lewis basic pyridyl sites for highly selective C2H2/CH4 and C2H2/CO2 gas separation at room temperature [J].