Zr-Based Metal-Organic Nanoporous Adsorbents of High Density for Methane Storageстатья
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Дата последнего поиска статьи во внешних источниках: 30 декабря 2020 г.
Аннотация:Abstract—A Zr–BDC metal–organic framework was synthesized by the solvothermal method usingN,N-dimethylformamide as an organic solvent at the temperature 110 °С. The adsorbent thusobtained is characterized by a developed porous structure with specific BET surface SBET = 1057 m2/g,micropore volume W0 = 0.44 cm3/g, and average micropore radius х0 = 0.54 nm, which is indicative ofa potentially effective adsorbent for adsorbed natural gas storage systems. The shaping parameters were determinedfor the Zr–BDC-based composites with polyvinyl alcohol as a binder and without the use of anybinder at various compacting pressures. The influence of the shaping pressure on the packing density andstructural and energy characteristics of the obtained samples was investigated. Based on the Dubinin theoryof volume filling of micropores, the pressure dependences of the methane deliverable capacity both in the initialpowdered and shaped Zr–BDC adsorbents at the temperatures of 243, 273, and 303 K were calculated forthe pressures up to 100 bar. The deliverable volumetric methane capacity of the adsorption system based onthe shaped Zr–BDC samples was measured in the specified thermodynamic conditions.