Robust design of countercurrent adsorption separation processes: 2. Multicomponent systems
Robust design of countercurrent adsorption separation processes: 2. Multicomponent systems
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逆流吸附分离工艺的稳健设计：2.多组分系统
DOI：
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发表时间：
1994
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
对四段逆流分离装置中多组分混合物的吸附分离进行了分析。在平衡理论的框架下，建立了吸附平衡用常选择性化学计量模型描述，忽略传质阻力和轴向分散的吸附平衡优化设计方法。
获得的一组条件定义了运行参数空间中机组实现完全分离的区域。在二元分离的情况下，解吸剂对要分离的组分具有任何吸附能力，该区域的边界是显式获得的。在一般的多分量情况下，需要进行数值计算。设计了一种近似捷径方法，可以获得用于估计精确区域边界的显式和可靠的关系。
结果不仅为分析脱附剂在确定分离性能中的作用提供了一个非常方便的工具，而且为寻找最佳和稳健的操作条件提供了一个非常方便的工具。模型预测和实验数据的比较评估了理论研究结果的可靠性和准确性。
The adsorption separation of a multicomponent mixture in a four-section countercurrent separation unit is analyzed. A procedure for the optimal and robust design of the unit is developed in the frame of equilibrium theory, where adsorption equilibria are described through the constant selectivity stoichiometric model, while mass-transfer resistances and axial dispersion are neglected.
A set of conditions obtained defines a region in the operating parameters space where the unit achieves complete separation. In the case of binary separations, with a desorbent having any adsorptivity with respect to the components to be separated, the boundaries of this region are obtained explicitly. In the general multicomponent case, a numerical procedure is needed. An approximate shortcut method devised allows to obtain explicit and reliable relationships for estimating the boundaries of the exact region.
The results provide a very convenient tool not only to analyze the role of the desorbent in determining the separation performance, but to find both optimal and robust operating conditions. Comparison between model predictions and experimental data assesses the reliability and accuracy of the theoretical findings.