Abstract
The Dubinin theory of volume filling of micropores (TVFM) was used to study the structure–energy characteristics of metal-organic frameworks based on salts of copper (C300), aluminum (A520), and zinc (Z205) produced by BASF. Isotherms of absolute adsorption of methane were measured on these adsorbents at the temperatures of 303, 313, 323, and 333 K and pressures up to 40 MPa. Dependences of differential molar isosteric heats of methane adsorption on the adsorption value and the dependence of the specific volume capacity of methane accumulation on pressure are calculated. In the technically significant range of pressures up to 10 MPa, adsorbents with high values of specific surface area cannot guarantee high specific capacities of methane accumulation. The thermodynamic Р,Т-parameters of adsorption systems of methane accumulation determine the optimum structural and energy characteristics of adsorbents suitable for high-performance methane accumulation.
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Fomkin, A.A., Tsivadze, A.Y., Aksyutin, O.E. et al. Adsorption of Natural Gas Methane on Metal-Organic Framework Structures in the Range of Supercritical Temperatures. Prot Met Phys Chem Surf 54, 347–353 (2018). https://doi.org/10.1134/S2070205118010069
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DOI: https://doi.org/10.1134/S2070205118010069