In this research, KO₂ pellets as a solid adsorbent have been evaluated for the CO₂ adsorption process. The KO₂ pellets with advantages in CO₂ uptake, besides O₂ production, have been considered as air revitalization components, especially for closed respiratory environments in the infrastructure of life support systems (LSS). A unique set of experimental data of a single adsorption equilibrium of CO₂ on KO₂ pellet adsorbents at concentrations 8500–9500 mg L⁻¹ (as closed atmosphere with a CO₂% high value due to respiratory of human) and temperature 298.15 K is reported. Operating parameters such as temperature and humidity are tested experimentally to check the adsorption capacity. The maximum adsorption capacity at a temperature of 20 °C and humidity of 70% was 660 and 620 mg g⁻¹, respectively. The kinetic study showed that the CO₂ adsorption data correctly are adjusted by the Rate-controlling model with an R² value of 0.984. The calculated thermodynamic parameters such as entropy (-0.0277 kJ mol⁻¹ K⁻¹), enthalpy (-12.406 kJ mol⁻¹), and Gibbs free energy changes (-4.136 kJ mol⁻¹) indicate the spontaneous and exothermic of the process. Equilibrium adsorption data were placed in the Langmuir, Freundlich, Dubinin-Radushkevich, and Temkin isotherms. Based on the regression coefficient (R²), the Dubinin-Radushkovich model provides a complete fit with the experimental data (R² = 0.989). The BET-specific surface area of the KO₂ pellets before and after the CO₂ adsorption process was about 1.26 and 1.19 m² g⁻¹, respectively.

在这项研究中，已经针对 CO ₂吸附过程评估了作为固体吸附剂的KO ₂颗粒。除了生产O ₂外，在 CO ₂吸收方面具有优势的 KO ₂颗粒被认为是空气再生组件，特别是对于生命支持系统 (LSS) 基础设施中的封闭呼吸环境。一组独特的 CO ₂在浓度为 8500–9500 mg L ^{-1 的}KO ₂颗粒吸附剂上的单一吸附平衡的实验数据（作为具有 CO ₂% 高值由于人类呼吸）和温度 298.15 K 报告。通过实验测试温度和湿度等操作参数以检查吸附能力。在20°C 的温度和70% 的湿度下的最大吸附容量分别为660 和620 mg g ^-1。动力学研究表明，CO ₂吸附数据通过速率控制模型正确调整，R ²值为0.984。计算出的热力学参数，例如熵 (-0.0277 kJ mol ^-1  K ^-1 )、焓 (-12.406 kJ mol ^-1 ) 和吉布斯自由能变化 (-4.136 kJ mol ^-1) 表示过程的自发和放热。平衡吸附数据置于 Langmuir、Freundlich、Dubinin-Radushkevich 和 Temkin 等温线中。基于回归系数 (R ² )，Dubinin-Radushkovich 模型提供了与实验数据的完全拟合 (R ²  = 0.989)。CO ₂吸附过程前后的KO ₂颗粒的BET比表面积分别为约1.26和1.19 m ²  g ^-1。