Investigation on water vapor adsorption performance of LiCl@MIL‐100(Fe) composite adsorbent for adsorption heat pumps,International Journal of Energy Research

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Investigation on water vapor adsorption performance of LiCl@MIL‐100(Fe) composite adsorbent for adsorption heat pumps
International Journal of Energy Research ( IF 4.3 ) Pub Date : 2020-03-23 , DOI: 10.1002/er.5361
Yanshu Luo ₁ , Bingqiong Tan ₁ , Xianghui Liang ₁ , Shuangfeng Wang ₁ , Xuenong Gao ₁ , Zhengguo Zhang ₁ , Yutang Fang ₁

Affiliation

MIL‐100(Fe) with good hydrothermal stability and high hydrophilicity is considered to be a potential adsorbent for adsorption heat pumps (AHPs). However, its water vapor adsorption performance at low relative humidity needs to be improved. In this study, composite adsorbent LiCl@MIL‐100(Fe) was synthesized by impregnating LiCl aqueous solution in MIL‐100(Fe). The effects of the LiCl loading in the composite on the crystal structure, morphology, composition, pore structure as well as the vapor adsorption/desorption performance of the composites were carefully studied. The results showed that on the premise of ensuring no leakage, the LiCl loading in the composite was up to 32.9 wt%. At 20% relative humidity (RH), the saturated adsorption ratio of the composite (0.260 g/g) was higher than that of original MIL‐100(Fe) (0.054 g/g). Meanwhile, the water adsorption rate of the new composite adsorbent was faster than pristine MIL‐100(Fe). Moreover, after 50 cycles of vapor adsorption/desorption, the composite adsorbent showed a satisfactory stability. All these indicate that the new LiCl@MIL‐100(Fe) composite adsorbent will be a prospective candidate for high‐efficiency AHPs.

中文翻译：

吸附热泵用LiCl @ MIL-100（Fe）复合吸附剂对水蒸气的吸附性能研究

具有良好的水热稳定性和高亲水性的MIL-100（Fe）被认为是吸附热泵（AHP）的潜在吸附剂。但是，需要改善其在低相对湿度下的水蒸气吸附性能。在这项研究中，通过将LiCl水溶液浸渍在MIL-100（Fe）中来合成复合吸附剂LiCl @ MIL-100（Fe）。仔细研究了复合材料中LiCl的负载量对复合材料的晶体结构，形貌，组成，孔结构以及气相吸附/解吸性能的影响。结果表明，在确保无泄漏的前提下，复合材料中LiCl的负载量高达32.9 wt％。在20％的相对湿度（RH）下，复合材料的饱和吸附率（0.260 g / g）高于原始MIL-100（Fe）（0.054 g / g）。与此同时，新型复合吸附剂的水吸附速率比原始MIL-100（Fe）快。此外，在50次蒸气吸附/解吸循环之后，该复合吸附剂显示出令人满意的稳定性。所有这些表明，新型LiCl @ MIL-100（Fe）复合吸附剂将成为高效AHP的潜在候选者。

更新日期：2020-03-23

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