Adsorbed natural gas (ANG) storage systems are based on nanoporous adsorbents with a tailored porous structure. Activated carbons are among the most promising and widely used candidates for this application, which is explained by the availability and abundance of raw material resources. In the present work, several series of activated carbons prepared from various precursors (coconut shell, peat, polymers, silicon carbide, and mineral coal) by different routes of physical and thermochemical activation were considered in the context of the adsorbed natural gas storage applications. Based on the Dubinin theory of volume filling of micropores and BET method, the porous structure of these adsorbents was evaluated from standard adsorption isotherms. The XRD, SAXS, and SEM measurements revealed variations in the textural and morphological properties of the adsorbents and their dependence on the precursor and synthesis procedure. The pore sizes evaluated from the adsorption and SAXS data were compared. Experimental data on methane adsorption at the temperature of 303 K and pressures of 0.1, 3.5, and 10 MPa made it possible to identify the most effective adsorbents. It was shown that the adsorption properties of ACs prepared from peat and mineral coal are determined by surface chemistry inherited from the precursor and activating agent. In contrast, the adsorption performance of ACs from polymer and coconut shell depends solely on the pore volume and pore dimensions. The adsorption effectiveness of each AC varies with pressure as a function of textural properties. Thus, a selection of an optimal adsorbent should be adjusted for thermodynamical coditions of ANG system.

吸附式天然气（ANG）存储系统基于具有定制多孔结构的纳米多孔吸附剂。活性炭是该应用中最有前途和最广泛使用的候选材料之一，这可以通过原材料资源的可用性和丰富性来解释。在目前的工作中，在吸附天然气存储应用的背景下，考虑了由各种前体（椰子壳，泥煤，聚合物，碳化硅和矿物煤）通过不同的物理和热化学活化途径制备的一系列活性炭。基于Dubinin微孔体积填充理论和BET方法，通过标准吸附等温线评估了这些吸附剂的多孔结构。XRD，SAXS，SEM和SEM测量揭示了吸附剂的结构和形态特性的变化以及它们对前体和合成方法的依赖性。比较了根据吸附和SAXS数据评估的孔径。在303 K的温度和0.1、3.5和10 MPa的压力下进行甲烷吸附的实验数据可以确定最有效的吸附剂。结果表明，由泥炭和矿物煤制得的ACs的吸附性能是由前体和活化剂所继承的表面化学决定的。相反，聚合物和椰子壳中AC的吸附性能仅取决于孔体积和孔尺寸。每个AC的吸附效率随压力的变化而变化，这是结构特性的函数。从而，