Molecular simulation of carbon dioxide/methane/hydrogen mixture adsorption in metal-organic frameworks.
This work performs a systematic computational study toward a molecular understanding of the separation characteristics of metal-organic frameworks (MOFs), for which the purification of synthetic gas by two representative MOFs, MOF-5 and Cu-BTC, is adopted as an example. The simulations show that both geometry and pore size affect largely the separation efficiency, complex selectivity behaviors with different steps can occur in MOFs, and the electrostatic interactions that exist can enhance greatly the separation efficiency of gas mixtures composed of components with different chemistries. Furthermore, the macroscopic separation behaviors of the MOF materials are elucidated at a molecular level to give insight into the underlying mechanisms. The findings as well as the molecular-level elucidations provide useful microscopic information toward a complete understanding of the separation characteristics of MOFs that may lead to general design strategies for synthesizing new MOFs with tailored properties, as well as guiding their practical applications.
Yang
Qingyuan
Q
Department of Chemical Engineering, Key Laboratory of Bioprocess of Beijing, Beijing University of Chemical Technology, Beijing 100029, China.
Zhong
Chongli
C
D000327:Adsorption; D002245:Carbon Dioxide; D003198:Computer Simulation; D006859:Hydrogen; D046911:Macromolecular Substances / Q000737:chemistry*; D008697:Methane; D008853:Microscopy; D009942:Organometallic Compounds / Q000737:chemistry*; D055672:Static Electricity
D046911:Macromolecular Substances; D009942:Organometallic Compounds; D002245:Carbon Dioxide; D006859:Hydrogen; D008697:Methane