This study explores the impacts of materials, such as adsorbents and electrodes, on the energy efficiency of a 4-step ESA cycle for CO₂ capture. Three types of adsorbents including activated carbon honeycomb monolith (ACHM) and two hybrid adsorbents are compared, and two kinds of electrodes such as aluminum and brass are combined for comparative analysis. Process description of ESA cycle, including feed, electrification, electrification with purge and cooling, is presented via the adsorption isotherm diagram. By the theory of thermodynamic carbon pump, sensitivity analysis of cycle parameters is evaluated in terms of the second-law efficiency (Eff_2nd) and the electrical heating efficiency (Eff_ele). The results show that Eff_2nd of the employed adsorbents is in the range of 1.17%–6.15%, and Eff_ele of the selected electrodes is between 27.46% and 60.91%. Among the three adsorbents, Eff_2nd of ACHM is the lowest one compared to the others. Similarly, Eff_ele of the combination with brass is superior to that of the groups with aluminum. However, the actual efficiency of ESA cycle is the production of both Eff_2nd and Eff_ele, which is approximately 1.03%–3.66%. Typical measures are proposed to reduce the heat loss of the adsorbents and electrodes as well for future work.

这项研究探索了诸如吸附剂和电极之类的材料对用于捕获CO ₂的4步ESA循环的能量效率的影响。比较了三种类型的吸附剂，包括活性炭蜂窝整体材料（ACHM）和两种混合型吸附剂，并结合了两种电极（如铝和黄铜）进行比较分析。通过吸附等温线图介绍了ESA循环的过程描述，包括进料，带电，吹扫和冷却带电。根据热力学碳泵的理论，以二次律效率（Eff _2nd）和电加热效率（Eff _ele）评估了循环参数的敏感性分析。结果表明，Eff _2nd所用吸附剂的含量在1.17％-6.15％之间，所选电极的Eff _ele在27.46％至60.91％之间。在三种吸附剂中，ACHM的Eff _2nd是最低的。类似地，Eff为_ELE与黄铜相结合优于与铝的基团。但是，ESA循环的实际效率是Eff _2nd和Eff _ele的产量，大约为1.03％–3.66％。提出了典型的措施以减少吸附剂和电极的热损失，以及用于将来的工作。