Journal article
Force Field Development from Periodic Density Functional Theory Calculations for Gas Separation Applications Using Metal-Organic Frameworks
Journal of physical chemistry. C, Vol.120(23), pp.12590-12604
06/16/2016
DOI: 10.1021/acs.jpcc.6b03393
Abstract
We present accurate force fields developed from density functional theory (DFT) calculations with periodic boundary conditions for use in molecular simulations involving M-2(dobdc) (M-MOF-74; dobdc(4-) = 2,5-dioxidobenzenedicarboxylate; M = Mg, Mn, Fe, Co, Ni, Zn) and frameworks of similar topology. In these systems, conventional force fields fail to accurately model gas adsorption due to the strongly binding open-metal sites. The DFT-derived force fields predict the adsorption of CO2, H2O, and CH4 inside these frameworks much more accurately than other common force fields. We show that these force fields can also be used for M2(dobpdc) (dobpdc(4-) = 4,4'-dioxidobiphenyl-3,3'-dicarboxylate), an extended version of MOF-74, and thus are a promising alternative to common force fields for studying materials similar to MOF-74 for carbon capture applications. Furthermore, it is anticipated that the approach can be applied to other metal organic framework topologies to obtain force fields for different systems. We have used this force field to study the effect of contaminants such as H2O and N-2 upon these materials' performance for the separation of CO2 from the emissions of natural gas reservoirs and coal-fired power plants. Specifically, mixture adsorption isotherms calculated with these DFT-derived force fields showed a significant reduction in the uptake of many gas components in the presence of even trace amounts of H2O vapor. The extent to which the various gases are affected by the concentration of H2O in the reservoir is quantitatively different for the different frameworks and is related to their heats of adsorption. Additionally, significant increases in CO2 selectivities over CH4 and N2 are observed as the temperature of the systems is lowered.
Details
- Title: Subtitle
- Force Field Development from Periodic Density Functional Theory Calculations for Gas Separation Applications Using Metal-Organic Frameworks
- Creators
- Rocio Mercado - Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USABess Vlaisavljevich - Univ Calif Berkeley, Dept Chem & Biomol Engn, Berkeley, CA 94720 USALi-Chiang Lin - Univ Calif Berkeley, Dept Chem & Biomol Engn, Berkeley, CA 94720 USAKyuho Lee - Lawrence Berkeley National LaboratoryYongjin Lee - École Polytechnique Fédérale de LausanneJarad A. Mason - Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USADianne J. Xiao - Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USAMiguel I. Gonzalez - Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USAMatthew T. Kapelewski - Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USAJeffrey B. Neaton - Lawrence Berkeley National LaboratoryBerend Smit - École Polytechnique Fédérale de Lausanne
- Resource Type
- Journal article
- Publication Details
- Journal of physical chemistry. C, Vol.120(23), pp.12590-12604
- DOI
- 10.1021/acs.jpcc.6b03393
- ISSN
- 1932-7447
- eISSN
- 1932-7455
- Publisher
- Amer Chemical Soc
- Number of pages
- 15
- Grant note
- DE-AC02-05CH11231 / Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy; United States Department of Energy (DOE) NSF Graduate Research Fellowships; National Science Foundation (NSF) DE-SC0001015 / Energy Frontier Research Center - U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences; United States Department of Energy (DOE) Center for Gas Separations Relevant to Clean Energy Technologies DE-AC02-05CH11231 / Office of Science of the U.S. Department of Energy; United States Department of Energy (DOE)
- Language
- English
- Date published
- 06/16/2016
- Academic Unit
- Chemistry
- Record Identifier
- 9984618519202771
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