Adsorption phenomena are encountered in several engineering applications. One of its uses is in the storage and transport of gas in the form of adsorption tanks. The exothermic nature of the adsorption process decreases adsorption capacity presenting an impetus to understand the thermal characteristics of the gas storage process. Studies using mixtures of phase change materials and adsorbents in adsorption tanks demonstrate potential improvements in the adsorption capacity of the tanks. They also show that the distribution of phase change materials and adsorbent are important. Thus, this work presents two approaches for optimising the adsorbent domain. The first is to use a semi-analytic model to determine the best homogeneous material concentration for the adsorbent and phase change material for the vessel composition. The other is to use a 2D axisymmetric model to perform FGM optimisation to distribute material in the tank. Results for both models are presented and discussed for different conditions. The study shows that, for the cylindrical geometry, FGM optimisation is always, at least, marginally better than the homogeneous distribution from the semi-analytic model. However, FGM optimisation demands more computing time increases the complexity of implementation and results assembling. The semi-analytic approach is a possible alternative for optimising adsorption systems with phase change material mixed with adsorbents.

在一些工程应用中会遇到吸附现象。它的用途之一是以吸附罐的形式存储和运输气体。吸附过程的放热性质降低了吸附容量，为理解气体存储过程的热特性提供了动力。在吸附罐中使用相变材料和吸附剂混合物的研究表明，吸附罐的吸附能力有潜在的提高。他们还表明，相变材料和吸附剂的分布很重要。因此，这项工作提出了两种优化吸附域的方法。首先是使用半分析模型来确定容器组成的吸附剂和相变材料的最佳均质材料浓度。另一种方法是使用2D轴对称模型进行FGM优化，以在储罐中分配材料。给出并讨论了两种模型在不同条件下的结果。研究表明，对于圆柱几何形状，FGM优化总是至少比半解析模型的均匀分布略好。但是，FGM优化需要更多的计算时间，这增加了实现和结果组装的复杂性。对于将相变材料与吸附剂混合的吸附系统进行优化，半解析方法是一种可能的选择。至少比半解析模型的均匀分布好一点。但是，FGM优化需要更多的计算时间，这增加了实现和结果组装的复杂性。对于将相变材料与吸附剂混合的吸附系统进行优化，半解析方法是一种可能的选择。至少比半解析模型中的均匀分布好一点。但是，FGM优化需要更多的计算时间，这增加了实现和结果组装的复杂性。对于将相变材料与吸附剂混合的吸附系统进行优化，半解析方法是一种可能的选择。