Design of Optimal Operating Conditions of Simulated Moving Bed Adsorptive Separation Units
Design of Optimal Operating Conditions of Simulated Moving Bed Adsorptive Separation Units
复制标题
模拟移动床吸附分离装置优化运行工况设计
DOI：
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发表时间：
1995
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：
G. Storti;R. Baciocchi;M. Mazzotti;M. Morbidelli
研究了模拟移动床吸附分离装置最佳操作条件的设计问题。为实现指定的分离要求的操作条件的先验选择的程序开发的框架内的平衡理论的等效四段逆流单元，使用的模型，其中的吸附平衡是通过恒定的选择性化学计量模型来描述，而忽略传质阻力和轴向分散。操作参数的空间，即质量流率比m[sub j]，被划分为具有不同分离状态的区域。在（m[sub 2]，m[sub 3]）平面上绘制了出口纯度和回收率恒定时的曲线。引入三个性能参数，解吸剂的要求，吸附剂的要求，和生产率，允许开发的程序设计的最佳操作条件。完成了该过程，考虑了切换时间对分离性能的影响，并建立了SMB单元的详细模型，同时考虑了轴向分散和传质阻力。这一结果构成了一个有用的工具，用于确定操作条件的范围，以实现指定的分离要求，然后在此范围内选择最佳的操作条件。
The design of the optimal operating conditions for simulated moving bed (SMB) adsorptive separation units is considered. A procedure for the a priori selection of the operating conditions to achieve an assigned separation requirement is developed in the frame of equilibrium theory for the equivalent four section countercurrent unit, using a model where the adsorption equilibria are described through the constant selectivity stoichiometric model, while both mass transfer resistance and axial dispersion are neglected. The space of the operating parameters, i.e. the mass flow rate ratios m[sub j], is divided in regions with different separation regimes. Curves at constant outlets purity and recovery are drawn in the (m[sub 2],m[sub 3]) plane. The introduction of three performance parameters, desorbent requirement, adsorbent requirement, and productivity, allows the development of a procedure for the design of optimal operating conditions. This procedure is completed, accounting for the effect of the switching time on the separation performances, with a detailed model of the SMB unit, considering both axial dispersion and mass transfer resistance. This result constitutes a useful tool for determining the range of operating conditions to achieve an assigned separation requirement and then for selecting the optimal operating condition within this range.