In an attempt to promote research on adsorption cooling systems, novel activated carbon-based composite adsorbents have been studied for thermophysical properties and adsorption characterization with difluoromethane (HFC 32) refrigerant. High surface area activated carbon of type Maxsorb III has been selected as the primary constituent of adsorbent composites, with H25 graphene nanoplatelets (GNPs), 1-Hexyl-3-methylimidazolium bis(trifluormethylsulfonyl)imide ([HMIM][Tf₂N]) ionic liquid, and Polyvinyl alcohol (PVA) binder in varying fractions. The various thermophysical properties such as surface area and porosity, specific heat capacity, and thermal conductivity have been experimentally evaluated. The thermal diffusivities have been measured in two different planes of the composites: parallel and perpendicular to the direction of the compression. It has been observed that the perpendicular plane has significantly higher thermal diffusivities (up to 2.32 times) over the parallel plane of the composites. Besides, a considerable improvement in thermal conductivity of up to 65.6 times is observed over powdered activated carbon. Adsorption uptake characteristics are studied gravimetrically for the composite samples in the temperature range of 30–70°C. Dubinin-Astakhov (D-A) and Tóth models are fitted successfully for the adsorption isotherms, with the D-A model seen to offer better fits. Further, the specific and volumetric cooling energies are estimated for the consolidated carbon composites based on the respective D-A adsorption equilibrium parameters and thermophysical properties of the working pairs. Significant enhancements in volumetric cooling energy up to 78% over that of powdered activated carbon are seen for the consolidated composites.

为了促进对吸附冷却系统的研究，已经研究了新型的基于活性炭的复合吸附剂的热物理性质和对二氟甲烷（HFC 32）制冷剂的吸附特性。已选择Maxsorb III型高表面积活性炭作为吸附剂复合材料的主要成分，其中包括H25石墨烯纳米片（GNP），1-己基-3-甲基咪唑双（三氟甲基磺酰基）酰亚胺（[HMIM] [Tf ₂N]）离子液体，以及聚乙烯醇（PVA）粘合剂的不同比例。已经通过实验评估了各种热物理性质，例如表面积和孔隙率，比热容和热导率。已经在复合材料的两个不同平面中测量了热扩散率：平行和垂直于压缩方向。已经观察到，垂直平面在复合材料的平行平面上具有显着更高的热扩散率（高达2.32倍）。此外，与粉末状活性炭相比，可观察到高达65.6倍的导热率显着提高。在30–70°C的温度范围内，对复合样品的吸附吸收特性进行了重量分析。Dubinin-Astakhov（DA）和Tóth模型已成功拟合吸附等温线，DA模型被认为可以提供更好的拟合度。此外，基于各自的DA吸附平衡参数和工作对的热物理性质，估算固结碳复合材料的比能和体积冷却能。固结复合材料的体积冷却能量比粉状活性炭显着提高了78％。