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Peer reviewed
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Wilmer, Christopher E.; Farha, Omar K.; Yildirim, Taner; Eryazici, Ibrahim; Krungleviciute, Vaiva; Sarjeant, Amy A.; Snurr, Randall Q.; Hupp, Joseph T.
Energy & environmental science, 04/2013, Volume: 6, Issue: 4Journal Article
We have synthesized and characterized a new metal-organic framework (MOF) material, NU-125, that, in the single-crystal limit, achieves a methane storage density at 58 bar (840 psi) and 298 K corresponding to 86% of that obtained with compressed natural gas tanks (CNG) used in vehicles today, when the latter are pressurized to 248 bar (3600 psi). More importantly, the deliverable capacity (58 bar to 5.8 bar) for NU-125 is 67% of the deliverable capacity of a CNG tank that starts at 248 bar. (For crystalline granules or powders, particle packing inefficiencies will yield densities and deliverable capacities lower than 86% and 67% of high-pressure CNG.) This material was synthesized in high yield on a gram-scale in a single-batch synthesis. Methane adsorption isotherms were measured over a wide pressure range (0.1-58 bar) and repeated over twelve cycles on the same sample, which showed no detectable degradation. Adsorption of CO sub(2) and H sub(2) over a broad range of pressures and temperatures are also reported and agree with our computational findings.
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