Owing to the features of S-shape water sorption isotherm and low desorption temperature, MIL-101(Cr) has been considered as up-and-coming adsorbent for adsorption heat pumps (AHPs). In order to improve water vapor uptake at the low relative pressure (P/P₀ ≤ 0.3) for AHPs, a new type of solid adsorbent was fabricated by impregnating porous MIL-101(Cr) with the aqueous solution of hygroscopic salt such as CaCl₂ and LiCl. The effect of impregnation salt concentration on hygroscopicity of composite salt-MIL-101(Cr) was discussed. The crystalline phase, pore structure, morphology and the composition of the composites were characterized by X-ray diffraction, pore size analysis, Scanning Electron Microscopy and Energy Dispersive Spectrometry. And their adsorption and desorption performances were evaluated. The experimental results indicated that the composites obtained by dipping MIL-101(Cr) with the solution of 25% CaCl₂ and 15% LiCl, exhibited excellent adsorption capacities and fast adsorption rates. Their amounts adsorbed at P/P₀ of 0.3 reached 0.44, 0.45 g/g, respectively, which were much higher than the pristine MIL-101(Cr). Additionally, fifty separate adsorption/desorption cycles suggested that the composite had excellent reversibility. All the results indicated that the novel composite salt-MIL-101(Cr) are expected to be a promising candidate for AHPs.

由于S形水吸附等温线和低解吸温度的特点，MIL-101（Cr）被认为是吸附热泵（AHP）的新兴吸附剂。为了在低的相对压力，以改善水蒸汽吸收（P / ₀  ≤0.3）为AHPS，新型固体吸附剂通过用吸湿盐的水溶液，如氯化钙浸渍多孔MIL-101（Cr）的制造_2个和LiCl。讨论了浸渍盐浓度对复合盐-MIL-101（Cr）吸湿性的影响。通过X射线衍射，孔径分析，扫描电子显微镜和能谱分析对复合材料的晶相，孔结构，形貌和组成进行了表征。并对它们的吸附和解吸性能进行了评估。实验结果表明，用25％CaCl ₂和15％LiCl溶液浸渍MIL-101（Cr）得到的复合材料表现出优异的吸附能力和快速的吸附速率。它们的吸附量为P / P ₀0.3分别达到0.44和0.45 g / g，远高于原始的MIL-101（Cr）。另外，五十个单独的吸附/解吸循环表明该复合材料具有优异的可逆性。所有结果表明，新型复合盐-MIL-101（Cr）有望成为AHP的有前途的候选物。