This study introduces recommendations for conducting molecular simulations of vapor adsorption, with an emphasis on enhancing the accuracy, reproducibility, and comparability of results. The first aspect we address is consistency in the implementation of some details of typical molecular models, including tail corrections and cutoff distances, due to their significant influence on generated data. We highlight the importance of explicitly calculating the saturation pressures at relevant temperatures using methods such as Gibbs ensemble Monte Carlo simulations and illustrate some pitfalls in extrapolating saturation pressures using this method. For grand canonical Monte Carlo (GCMC) simulations, the input fugacity is usually calculated using an equation of state, which often requires the critical parameters of the fluid. We show the importance of using critical parameters derived from the simulation with the same model to ensure internal consistency between the simulated explicit adsorbate phase and the implicit bulk phase in GCMC. We show the advantages of presenting isotherms on a relative pressure scale to facilitate easier comparison among models and with experiment. Extending these guidelines to a practical case study, we evaluate the performance of various isoreticular metal–organic frameworks (MOFs) in adsorption cooling applications. This includes examining the advantages of using propane and isobutane as working fluids and identifying MOFs with a superior performance.
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14 May 2024
Research Article|
May 13 2024
Avoiding pitfalls in molecular simulation of vapor sorption: Example of propane and isobutane in metal–organic frameworks for adsorption cooling applications
Special Collection:
Porous Solids for Energy Applications
Filip Formalik
;
Filip Formalik
(Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Visualization, Writing – original draft, Writing – review & editing)
1
Department of Chemical and Biological Engineering, Northwestern University
, Evanston, Illinois 60208, USA
2
Department of Micro, Nano and Biomedical Engineering, Faculty of Chemistry, Wroclaw University of Science and Technology
, 50-370 Wroclaw, Poland
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Haoyuan Chen
;
Haoyuan Chen
(Conceptualization, Funding acquisition, Investigation, Project administration, Writing – original draft, Writing – review & editing)
3
Department of Chemistry, Department of Physics and Astronomy, The University of Texas Rio Grande Valley
, Edinburg, Texas 78539, USA
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Randall Q. Snurr
Randall Q. Snurr
a)
(Conceptualization, Funding acquisition, Project administration, Supervision, Writing – original draft, Writing – review & editing)
1
Department of Chemical and Biological Engineering, Northwestern University
, Evanston, Illinois 60208, USA
a)Author to whom correspondence should be addressed: snurr@northwestern.edu
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a)Author to whom correspondence should be addressed: snurr@northwestern.edu
J. Chem. Phys. 160, 184118 (2024)
Article history
Received:
February 06 2024
Accepted:
April 23 2024
Citation
Filip Formalik, Haoyuan Chen, Randall Q. Snurr; Avoiding pitfalls in molecular simulation of vapor sorption: Example of propane and isobutane in metal–organic frameworks for adsorption cooling applications. J. Chem. Phys. 14 May 2024; 160 (18): 184118. https://doi.org/10.1063/5.0202748
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