The dynamic adsorption isotherms of CO₂-EGR were measured by using an Intelligent Gravimetric Analysis system. In the initial CO₂ injecting stage, all the injected CO₂ enters into the adsorbent and the mole fraction of CH₄ in the gas phase () is maintained at 1.0. The CH₄ recovery factor () increases. The duration of this stage (t_CD) depends on the selectivity of CO₂ over CH₄ (). An adsorbent with large has long t_CD. In the second stage, the injected CO₂ competes with CH₄ for adsorption. The cumulative of the second stage is much larger than that of the initial stage. However, decreases sharply. in the whole CO₂ injection is always larger than that before CO₂ injection, suggesting that CH₄ desorption results from the displacement of CO₂ rather than from pressure depletion.

中文翻译：

---

通过注入 CO2 提高 CH4 回收率的动力学吸附

CO ₂ -EGR的动态吸附等温线通过使用智能重量分析系统测量。在初始CO ₂注入阶段，所有注入的CO ₂进入吸附剂，气相中CH ₄的摩尔分数( )保持在1.0。CH ₄回收系数 ( ) 增加。该阶段的持续时间 ( t _CD ) 取决于 CO ₂对 CH ₄ ( )的选择性。大的吸附剂的t _CD长。在第二阶段，注入的 CO ₂与 CH ₄竞争为吸附。第二阶段的累积量远大于初始阶段的累积量。然而，急剧下降。在整个CO ₂注入之前总是大于CO ₂注入之前，这表明CH ₄解吸是CO ₂的置换而不是压力消耗的结果。