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Implementation of Genetic Algorithms to Optimize Metal–Organic Frameworks for CO2 Capture

Journal Article · · Langmuir

Metal-organic frameworks (MOFs) are promising materials for CO2 capture with the potential to use less energy than current industrial CO2 capture methods. MOFs are highly versatile sorbents, and there is an almost unlimited number of MOFs that could be synthesized. In this work, we used a genetic algorithm (GA) and grand canonical Monte Carlo (GCMC) simulations to efficiently search for high-performing MOFs for CO2 capture. We analyzed the effects of important GA parameters, including the mutation probability, the number of MOFs per generation and the number of GA generations, on the GA performance. Here, we performed GCMC simulations on-the-fly during the GA procedure to determine the performance of proposed MOFs and optimized their structures using multiple objective functions across different topologies. The GA was able to determine top-performing MOFs balancing CO2 selectivity versus working capacity and reduced the cost of molecular simulations by a factor of 25 versus brute-force screening of an entire database of structures.

Research Organization:
Northwestern University, Evanston, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); National Energy Research Scientific Computing Center (NERSC)
Grant/Contract Number:
SC0023454; AC02-05CH11231
OSTI ID:
2587659
Journal Information:
Langmuir, Journal Name: Langmuir Journal Issue: 7 Vol. 41; ISSN 0743-7463; ISSN 1520-5827
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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