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吸附剂孔内扩散对模拟移动床分离过程的影响

DOI: 10.3969/j.issn.1671-7627.2009.06.018, PP. 82-86

Keywords: 模拟移动床,扩散,综合速率模型

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Abstract:

为考察孔内扩散对模拟移动床分离过程的作用,采用综合速率模型对其进行研究,其中流动相模型为轴向扩散活塞流,颗粒相为fick定律描述的扩散方程,液相和固相之间的吸附平衡采用改进的langmuir吸附等温线.对流动相和颗粒相分别采用有限元galerkin法和正交配置法,沿空间方向离散化后的常微分方程组运用matlab的ode求解器求解.在验证了模型和离散方法对模拟移动床吸附分离过程计算的可靠性的基础上,模拟了emd53986对映体的模拟移动床分离过程,跟文献中使用忽略孔内传质过程的模型得到的计算值相比,模拟值与实验值吻合得更好,表明孔内扩散传质过程对模拟移动床模拟计算的重要性.

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