Robust design of countercurrent adsorption separation: 3. Nonstoichiometric systems
Robust design of countercurrent adsorption separation: 3. Nonstoichiometric systems
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逆流吸附分离的稳健设计：3.非化学计量系统
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
M. Morbidelli
中科院分区：
文献类型：
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作者：
M. Mazzotti;G. Storti;M. Morbidelli
分析了逆流吸附分离装置中多组分混合物的分离。在平衡理论框架下开发了装置操作条件的优化和鲁棒设计程序，其中吸附平衡通过恒定选择性非化学计量朗缪尔模型描述，而忽略传质阻力和轴向扩散。这允许将先前获得的以线性或化学计量朗缪尔等温线为特征的系统的结果扩展到吸附物表现出相当不同的负载能力的情况。讨论了这三种平衡模型在逆流分离装置操作条件选择标准方面的类比和差异。模型预测与实验数据之间的比较评估了本工作中所取得的理论结果的可靠性和准确性。
The separation of a multicomponent mixture in a countercurrent adsorptive separation unit is analyzed. A procedure for the optimal and robust design of the operating conditions of the unit is developed in the frame of equilibrium theory, where the adsorption equilibria are described through the constant selectivity nonstoichiometric Langmuir model, while mass-transfer resistances and axial dispersion are neglected. This allows for extending the results previously obtained for systems characterized by either the linear or stoichiometric Langmuir isotherm to cases where the adsorbates exhibit rather different loading capacities. Analogies and differences among these three equilibrium models with respect to the criteria for the choice of operating conditions of countercurrent separation units are discussed. A comparison between model predictions and experimental data assesses the reliability and accuracy of the theoretical results achieved in this work.