Muttakin Mahbubul, Pal Animesh, Rupa Mahua Jahan, Ito Kazuhide, Saha Bidyut Baran
Department of Mechanical and Production Engineering, Ahsanullah University of Science and Technology, Tejgaon, Dhaka 1208, Bangladesh.
Department of Nuclear Engineering, University of Dhaka, Dhaka 1000, Bangladesh.
Adv Colloid Interface Sci. 2021 Aug;294:102468. doi: 10.1016/j.cis.2021.102468. Epub 2021 Jun 17.
The dynamic uptake of adsorbate onto the porous adsorbent plays a crucial role in determining the performance of the adsorption-based cooling system. Therefore, it is imperative to know the kinetics parameters of an adsorbate - adsorbent pair to design a system to be operated at variable working conditions. The kinetics models of adsorption, used to simulate the adsorption rate of different pairs, are derived and presented in this paper. Besides, the limitations and advantages of the models are also mentioned. Moreover, the dynamic performance of different adsorption pairs is analyzed, and the values of kinetics parameters, determined through experimental procedures and fitting of kinetics models, are also summarized. It is opined that during the initial unsaturated condition of adsorption, the semi-infinite model can be preferred to determine the diffusion time constant. The modification of different models, e.g., Langmuir and linear driving force models, can significantly overcome the drawbacks of the models, as shown by several researchers. However, research may be carried out to investigate different models' fitting errors from a statistical perspective. Furthermore, to evaluate the dynamic performance of different adsorbates, a lot of research needs to be done, specifically, on the adsorption of the newly developed environment-friendly refrigerants, onto the promising composite adsorbents possessing high thermal conductivity and significantly improved adsorption uptakes.
吸附质在多孔吸附剂上的动态吸附对于确定基于吸附的制冷系统的性能起着至关重要的作用。因此，了解吸附质 - 吸附剂对的动力学参数对于设计可在可变工作条件下运行的系统至关重要。本文推导并给出了用于模拟不同吸附对吸附速率的吸附动力学模型。此外，还提到了这些模型的局限性和优点。此外，分析了不同吸附对的动态性能，并总结了通过实验程序和动力学模型拟合确定的动力学参数值。有人认为，在吸附的初始不饱和状态下，半无限模型可优先用于确定扩散时间常数。如几位研究人员所示，对不同模型（如朗缪尔模型和线性驱动力模型）进行修正可显著克服这些模型的缺点。然而，可能需要从统计角度研究不同模型的拟合误差。此外，为了评估不同吸附质的动态性能，还需要进行大量研究，特别是关于新开发的环保制冷剂在具有高导热率和显著提高的吸附量的有前景的复合吸附剂上的吸附研究。
