Citation: CAI Hong, WU Guang-Wei, LAI Jia-Li, CHEN Jin-Ping, CHEN Yan-Fei, LI Dan. Selective Adsorption of CO₂ by Biological Metal-Organic Framework ZnBTCA[J]. Chinese Journal of Inorganic Chemistry, ;2019, 35(11): 2083-2088. doi: 10.11862/CJIC.2019.236 shu

Selective Adsorption of CO₂ by Biological Metal-Organic Framework ZnBTCA

CAI Hong ^1,, ,
WU Guang-Wei ¹ ,
LAI Jia-Li ¹ ,
CHEN Jin-Ping ¹ ,
CHEN Yan-Fei ¹ ,
LI Dan ^2,,

1.
School of Chemistry and Environmental Engineering, Hanshan Normal University, Chaozhou, Guangdong 521041, China
2.
College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, China

Corresponding author: CAI Hong, tiddychen@163.com LI Dan, danli@jnu.edu.cn
Received Date: 12 September 2019
Revised Date: 27 September 2019

Figures(3)

A biological metal-organic framework (BioMOF) ZnBTCA was prepared by the solvent-thermal method, which showed interesting host-guest chemistry in CO₂ gas adsorption process. It was found that the adsorption enthalpy of CO₂ increased with the increase of adsorption capacity. Using four models to fit the adsorption isotherm of CO₂, we modeled and predicted the binary mixture selectivity by the ideal adsorbed solution theory (IAST), and tried to find a reasonable explanation for the abnormal adsorption behavior of ZnBTCA. ZnBTCA has high adsorption selectivity for CO₂ in CO₂/N₂ and CO₂/CH₄ binary systems due to the molecular sieve effect. This is attributed to the fact that ZnBTCA has NH₂, N-active site, and a large number of guest cations in the pores. The counterbalancing (CH₃)₂NH₂⁺ could not be evacuated through thermal activation, and the accessible micropore volume was reduced as a result.
- metal-organic framework,
- host-guest chemistry,
- gas absorption,
- molecular sieve effect
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沈阳化工大学材料科学与工程学院沈阳 110142

Selective Adsorption of CO2 by Biological Metal-Organic Framework ZnBTCA

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Selective Adsorption of CO₂ by Biological Metal-Organic Framework ZnBTCA