Adsorption systems are known as energy-saving and environmentally friendly technology, and porous adsorbent material is one of the critical elements of it. High-efficiency, compactness, and cost concern of these systems have motivated the preparation of functional carbons from waste biomass materials, which could be a promising adsorbent in the near future. In this paper, recently developed activated carbons (ACs) prepared from waste palm trunk and mangrove, possessing extremely high CO₂ adsorption capacity, have been employed to estimate thermodynamic properties for understanding the performance of practical adsorption cooling systems. The thermodynamic properties such as heat of adsorption, specific heat capacity, enthalpy, and entropy are investigated with the variation of temperature and surface loading. The highest theoretical value of specific cooling effect (SCE) and the coefficient of performance is predicted for different operating conditions of cooling systems. It should be mentioned that SCE improvement compared to Maxsorb III is 52 % for C600 samples and 74 % for C500 samples, indicating studied four samples are promising. The presented analyses carry crucial importance and would provide a guideline to design practical biomass-derived ACs/CO₂ based adsorption systems.

吸附系统被称为节能环保技术，而多孔吸附材料是其关键要素之一。这些系统的高效率，紧凑性和成本问题促使人们从废弃的生物质原料中制备功能碳，在不久的将来它可能成为有希望的吸附剂。在本文中，最近开发的由废棕榈树干和红树林制得的活性炭（AC）具有极高的CO ₂吸附容量已被用来估算热力学性质，以了解实际的吸附冷却系统的性能。随着温度和表面负荷的变化，研究了热力学性质，例如吸附热，比热容，焓和熵。针对冷却系统的不同运行条件，预测了特定冷却效果（SCE）的最高理论值和性能系数。应当指出，与Maxsorb III相比，C600样品的SCE改善为52％，C500样品的SCE改善为74％，这表明对四个样品的研究很有希望。提出的分析具有至关重要的意义，并将为设计实用的生物质衍生的基于ACs / CO ₂的吸附系统提供指导。