Molecular simulations of H2 adsorption in metal-porphyrin frameworks: A potential new material evaluation
- Univ. of Delaware, Newark, DE (United States); Univ. of Tennessee, Knoxville, TN (United States)
- Univ. of Tennessee, Knoxville, TN (United States)
Path integral grand canonical Monte Carlo (PI-GCMC) simulations using standard force fields are typically carried out to calculate the adsorption of H2 in five metal-porphyrin frameworks (MPFs), a new class of metal organic framework (MOF)-type materials. These simulations are performed at 77 K and room temperature (300 K). The adsorption isotherms of H2 in IRMOF-1 and IRMOF-10 are also calculated as a comparison. All calculations indicate that all MPFs adsorbed a higher weight fraction of H2 than both IRMOF-1 and IRMOF-10, with one exception (MPF-2). The gravimetric hydrogen capacities are still well short of practical goals. The MPFs provide additional adsorption sites due to the porphyrin. A statistical mechanical lattice model predicts the adsorption well at room temperature. The prediction by this model reflected that a weight fraction of hydrogen of 6 wt. % adsorbed in pores of the size found in IRMOF-1 at ambient temperature and modest pressures required a binding energy of about 17 kJ/mole, which is consistent with other findings.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
- Sponsoring Organization:
- USDOE Office of Fossil Energy (FE); USDOE Office of Science (SC); National Science Foundation (NSF)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1564774
- Journal Information:
- Journal of Renewable and Sustainable Energy, Vol. 3, Issue 5; ISSN 1941-7012
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Palladium-catalyzed amination of meso-(bromophenyl)porphyrins with diamines and azamacrocycles
|
journal | January 2014 |
Similar Records
New Carbon-Based Porous Materials with Increased Heats of Adsorption for Hydrogen Storage
Prediction of hydrogen adsorption in nanoporous materials from the energy distribution of adsorption sites