Abstract—

A Zr–BDC metal–organic framework was synthesized by the solvothermal method using N,N‑dimethylformamide as an organic solvent at the temperature 110°С. The adsorbent thus obtained is characterized by a developed porous structure with specific BET surface S_BET = 1060 m²/g, micropore volume W₀ = 0.44 cm³/g, and average micropore radius х₀ = 0.54 nm, which is indicative of a potentially effective adsorbent for adsorbed natural gas storage systems. The shaping parameters were determined for the Zr–BDC-based composites with polyvinyl alcohol as a binder and without the use of any binder at various compacting pressures. The influence of the shaping pressure on the packing density and structural and energy characteristics of the obtained samples was investigated. Based on the Dubinin theory of volume filling of micropores, the pressure dependences of the methane deliverable capacity both in the initial powdered and shaped Zr–BDC adsorbents at the temperatures of 243, 273, and 303 K were calculated for the pressures up to 100 bar. The deliverable volumetric methane capacity of the adsorption system based on the shaped Zr–BDC samples was measured in the specified thermodynamic conditions.

中文翻译：

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高密度Zr基金属有机纳米多孔吸附剂用于甲烷存储

摘要-

溶剂热法以N，N-二甲基甲酰胺为有机溶剂，在110°С的温度下合成了Zr-BDC金属-有机骨架。这样获得的吸附剂的特征在于，与特定的BET表面的展开多孔结构小号_BET =1060米² /克，微孔体积w ^ ₀ =0.44厘米³ / g，并且平均微孔半径х ₀＝ 0.54nm，这表明对于吸附的天然气存储系统潜在的有效吸附剂。确定了以聚乙烯醇为粘合剂的Zr-BDC基复合材料的成型参数，并且在各种压实压力下不使用任何粘合剂。研究了成型压力对所获得样品的堆积密度以及结构和能量特性的影响。根据Dubinin的微孔容积填充理论，在高达100 bar的压力下，初始粉末状和成形Zr-BDC吸附剂中甲烷的可传递容量在243、273和303 K的温度下的压力依赖性均被计算出来。基于成型的Zr–BDC样品的吸附系统的可输送体积甲烷容量是在指定的热力学条件下测量的。