Dual reflux pressure swing adsorption is a peculiar application of pressure swing adsorption with relevant separation potential. In a proper range of operating parameters, high separation performances are achieved in many applications, including complete separation in the case of binary mixtures. In this work, a new representation of the design parameters suitable for complete separation based on the semi-analytical solution of the corresponding Equilibrium Theory model is proposed for the four basic process configurations. Namely, given feed position, feed composition, and adsorbent separation selectivity, the combinations of the remaining process parameters ensuring complete separation are identified in a 3D plot. Furthermore, the same model equations have been solved numerically to explore conditions of incomplete separation, where the semi-analytical solution is not available. In particular, the sensitivity of the separation performances of each configuration to the pressure ratio has been explored. More specifically, given the region of operating conditions suitable for complete separation, selected operating conditions outside this region have been explored aimed to recover/improve the separation quality. Even though the different configurations exhibit different behaviors, the general dependence of the product purity upon the pressure ratio is quite limited and only minor improvements can be obtained with a few exceptions.

双回流变压吸附是变压吸附的一种特殊应用，具有相关的分离潜力。在适当的操作参数范围内，在许多应用中实现了高分离性能，包括在二元混合物的情况下完全分离。在这项工作中，基于相应平衡理论模型的半解析解，为四种基本工艺配置提出了适合完全分离的设计参数的新表示。即，给定进料位置、进料组成和吸附剂分离选择性，确保完全分离的剩余工艺参数的组合在 3D 图中确定。此外，同样的模型方程已被数值求解以探索不完全分离的条件，半解析解不可用的地方。特别是，已经探索了每种配置的分离性能对压力比的敏感性。更具体地说，给定适合完全分离的操作条件区域，已经探索了该区域之外的选定操作条件，旨在恢复/改善分离质量。尽管不同的配置表现出不同的行为，但产品纯度对压力比的一般依赖性非常有限，除了少数例外，只能获得很小的改进。考虑到适合完全分离的操作条件区域，已经探索了该区域之外的选定操作条件，旨在恢复/提高分离质量。尽管不同的配置表现出不同的行为，但产品纯度对压力比的一般依赖性非常有限，除了少数例外，只能获得很小的改进。考虑到适合完全分离的操作条件区域，已经探索了该区域之外的选定操作条件，旨在恢复/提高分离质量。尽管不同的配置表现出不同的行为，但产品纯度对压力比的一般依赖性非常有限，除了少数例外，只能获得很小的改进。