Approximate solution of intraparticle diffusion equations and their application to continuous-flow stirred tank and fixed-bed adsorption calculations

Chuncai Yao , Chi Tien
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引用次数: 11

Abstract

The two approximate uptake rate expressions of spherical adsorbent pellets developed previously (Yao, C. and Tien, C. Approximation of uptake rate of spherical adsorbent pellets and their application to batch adsorption calculations. Chem. Eng. Sci. 1993, 48, 187) were applied to continuous-flow stirred tank and fixed-bed adsorption processes. The results show that both approximations represent improvement over the conventional linear driving force model. Relative accuracy of these two approximations was found to vary from case to case and can be related to the type of driving force for interphase mass transfer present in the particular problem.

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颗粒内扩散方程的近似解及其在连续流搅拌槽和固定床吸附计算中的应用
姚,C.和Tien, C.提出了两种近似吸附剂球团吸收率的表达式(球形吸附剂球团吸收率的近似表达式及其在批量吸附计算中的应用)。化学。Eng。Sci. 1993, 48, 187)应用于连续流搅拌槽和固定床吸附过程。结果表明,这两种近似都比传统的线性驱动力模型有所改进。发现这两种近似的相对精度因情况而异,并且可能与特定问题中存在的相间传质驱动力的类型有关。
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