沸石 13X/MgSO4 作为潜在的储热材料：热性能表征和吸附动力学增强,New Journal of Chemistry

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沸石 13X/MgSO4 作为潜在的储热材料：热性能表征和吸附动力学增强
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2023-09-19 , DOI: 10.1039/d3nj03479h
Ying-Jie Huo ₁ , Ting Yan _{1,

2} , Xiao-Le Chang ₁ , Hong Zhang ₁ , Wei-Guo Pan _{1,

2}

Affiliation

固-气热化学吸附储热是一种高效的储热技术。由于其较高的理论储热密度，硫酸镁(MgSO ₄ )被认为是最有潜力的吸附储热材料之一。以13X沸石为基体，制备了13X沸石/MgSO _{4复合吸附剂，并研究了吸附-解吸性能，揭示了复合吸附剂的潜在储热能力。}添加13X沸石的目的是通过增加反应表面积来提高水合反应速率。_{13X/MgSO 4}沸石的蓄热能力对盐质量分数从5%增加到20%的复合吸附剂进行了实验研究。_{结果表明，含有20% MgSO 4}的复合吸附剂具有最佳的蓄热性能。在25℃、60%RH的条件下，含20%MgSO ₄的复合吸附剂的质量吸附容量为0.21 gg ^-1，蓄热密度为438.4 kJ kg ^-1。_{随着MgSO 4}质量分数从20%降低至5%，复合材料的吸附容量和储热密度分别降低至0.187 gg ^-1和378.8 kJ kg ^-1，分别。_{为了进一步增强传质，在含20%MgSO 4}的复合吸附剂中添加适量的LiCl ，验证了LiCl不仅可以提高吸附速率，而且吸附容量也提高了8.6%。

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Zeolite 13X/MgSO4 as a potential heat storage material: thermal performance characterization and sorption kinetics enhancement

Solid–gas thermochemical sorption heat storage is an efficient heat storage technology. Due to its high theoretical heat storage density, magnesium sulfate (MgSO₄) is considered as one of the most potential sorption heat storage materials. Using zeolite 13X as the matrix, zeolite 13X/MgSO₄ composite adsorbents were prepared, and the sorption–desorption performance was studied to reveal the potential heat storage capacity of the composite adsorbents. The addition of zeolite 13X aimed to enhance the hydration reaction rate by increasing the reaction surface area. The heat storage capacity of zeolite 13X/MgSO₄ composite adsorbents with the salt mass fraction increasing from 5% to 20% was experimentally studied. Results showed that the composite sorbent with 20% MgSO₄ offers the best heat storage performance. Under conditions of 25 °C and 60% RH, the mass sorption capacity of the composite sorbent containing 20% MgSO₄ was 0.21 g g⁻¹, and a heat storage density of 438.4 kJ kg⁻¹ was achieved. With the mass fraction of MgSO₄ being reduced from 20% to 5%, the sorption capacity and heat storage density of the composite decreased to 0.187 g g⁻¹ and 378.8 kJ kg⁻¹, respectively. To further enhance mass transfer, an appropriate amount of LiCl was added into the composite sorbent with 20% MgSO₄, verifying that LiCl can not only improve the adsorption rate, but also increase the sorption capacity by 8.6%.

更新日期：2023-09-19

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