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Energies 2015, 8(10), 11531-11545; doi:10.3390/en81011531

Molecular Simulation Studies of Flue Gas Purification by Bio-MOF

1
State Key Laboratory of Offshore Oil Exploitation, Beijing 100027, China
2
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
*
Author to whom correspondence should be addressed.
Academic Editor: Mehrdad Massoudi
Received: 4 August 2015 / Revised: 24 September 2015 / Accepted: 1 October 2015 / Published: 15 October 2015
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Abstract

As a new branch of MOFs which are composed of biocompatible metal ions and organic ligands, bio-metal-organic frameworks (bio-MOFs) have attracted much attention recently. Bio-MOFs feature multiple Lewis basic sites which have strong interaction with CO2 molecules, thus they have great potential in the separation and purification of gas mixtures containing CO2. In this work, molecular simulation studies were carried out to investigate the adsorption and diffusion behaviors of CO2/N2 gas mixtures in bio-MOF-11. Results show that bio-MOF-11 displays excellent adsorption selectivity towards CO2 in CO2/N2 gas mixtures which was dominated by electrostatic interaction between material and CO2. In addition, we found both CO2 and N2 molecules were preferably adsorbed around the pyrimidine ring and exocyclic amino and transferred to the secondary favorable adsorption sites (methyl groups) with increasing pressure. Bio-MOF-11 membranes show superior permeation selectivity, but low permeability for CO2/N2 gas systems. The reason is that the small pores restrict the movement of gas molecules, leading to the observed low permeability. The information obtained in this work can be applied to other theoretical and experimental studies of bio-MOFs adsorbents and membranes in the future. View Full-Text
Keywords: separation; diffusion; flue gas; bio-metal-organic frameworks (Bio-MOFs); molecular simulation separation; diffusion; flue gas; bio-metal-organic frameworks (Bio-MOFs); molecular simulation
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Li, Z.; Xu, G.; Liu, B.; Lv, X.; Chen, G.; Sun, C.; Xiao, P.; Sun, Y. Molecular Simulation Studies of Flue Gas Purification by Bio-MOF. Energies 2015, 8, 11531-11545.

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