This work uses chemical-physical activation to upgrade spent tire char for capturing CO₂, and CO₂ gas flow rate is the dominant factor of activation process based on the orthogonal experimental design. The final spent tire activated carbon with a specific surface area of 762.17 m²/g and a microporous pore volume of 0.23 cm³/g was obtained. The CO₂ adsorption behavior can be described by the Langmuir and Freundlich models. The optimum spent tire-based activated carbon has the capacity to capture CO₂ up to 1.42 mmol/g. It was also confirmed by Gibbs free energy change studies that the optimum spent tire-based activated carbon at less than 58.77 °C allows the CO₂ adsorption reaction to proceed spontaneously. The excellent regenerability of the produced activated carbon material was demonstrated by the isosteric heat of adsorption. The process of CO₂ adsorption was also confirmed as physical adsorption by various thermodynamic means. The spent tires recycling as CO₂ adsorbent is a promising path which realizes the dual benefits of waste recycling and CO₂ reduction.

本工作采用化学-物理活化法升级废轮胎炭捕集CO ₂，​​CO ₂气体流量是基于正交实验设计的活化过程的主导因素。最终得到比表面积为762.17 m ² /g、微孔孔容为0.23 cm ³ /g的废轮胎活性炭。CO ₂吸附行为可以用Langmuir 和Freundlich 模型来描述。最佳废轮胎基活性炭具有捕获高达 1.42 mmol/g 的CO _{2的能力。}吉布斯自由能变化研究也证实，低于 58.77 °C 的最佳废轮胎基活性炭允许 CO₂吸附反应自发进行。等量吸附热证明了所生产的活性炭材料具有出色的可再生性。_{CO 2}的吸附过程也被各种热力学手段证实为物理吸附。将废旧轮胎回收利用作为CO _{2吸附剂是一条很有前途的途径，它实现了废物回收利用和CO 2}减排的双重效益。