The synergistic pressure and temperature swing adsorption (SPTSA) technology is designed for purifying coalbed methane (CBM) are proposed in this work. Cyclic processes including four steps: cooling, pressurization, heating, and depressurization. Ideal adsorption solution theory (IAST) was used to evaluate the separation effect. Super activated carbons (SACs) with specific surface area exceeds 3000 m² g⁻¹ were prepared and used as adsorbents. From 273 to 373 K, the adsorption selectivity (S) changes more than 4, while the S changes less than 2 with the pressure changes from 0.1 to 9 MPa, indicating that temperature change is more conducive to improve the CH₄ purity compared to the pressure change. However, more CH₄ purification capacity can be obtained by pressure change. In cyclic SPTSA process, the CH₄ purification capacity is generally increased by more than 30% compared with the pressure swing adsorption technology, which indicated that CH₄ separation and purification under the synergistic action of temperature and pressure is theoretically feasible and has a broad prospect in the CBM purification. © 2021 Society of Chemical Industry and John Wiley & Sons, Ltd.

中文翻译：

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基于IAST理论的温压协同作用下煤层气富集CH4分离效果评价

本文提出了协同变压变温吸附（SPTSA）技术用于净化煤层气（CBM）。循环过程包括四个步骤：冷却、加压、加热和减压。理想吸附溶液理论（IAST）用于评价分离效果。制备了比表面积超过3000 m ² g ^{-1 的}超级活性炭（SAC）并将其用作吸附剂。从 273 到 373 K，吸附选择性 ( S ) 变化大于 4，而随着压力从 0.1 到 9 MPa，S变化小于 2，说明温度变化更有利于提高 CH ₄纯度与压力变化相比。然而，通过压力变化可以获得更多的CH ₄净化能力。在循环SPTSA工艺中，CH ₄净化能力较变压吸附技术普遍提高30%以上，表明温度和压力协同作用下CH ₄分离纯化在理论上是可行的，具有广阔的前景。在煤层气净化中。© 2021 化学工业协会和 John Wiley & Sons, Ltd.