薄片状吸附剂在间歇吸附器内的吸附动力学数值模拟

Numerical Simulation of Adsorption Dynamics for Planar Adsorbents in a Batch Adsorber

研究在吸附剂内表面扩散系数不为常数且同时考虑吸附剂内和吸附剂外扩散传质阻力时，薄片状吸附剂在间歇吸附器内的吸附动力学行为．结果表明：无因次平衡吸附量和影响吸附剂内表面扩散系数的浓度指数的减小，Ｆｒｅｕｎｄｌｉｃｈ平衡指数、Ｌａｎｇｍｕｉｒ平衡参数和Ｂｉｏｔ准数的增大，均有利于提高液相吸附速率．

The dynamics of liquid-phase adsorption in a batch adsorber for planar adsorbents with concentration-dependent surface diffusivities are numerically simulated. Both the intraparticle surface diffusion and the film mass transfer resistance are considered. The rate of liquid-phase adsorption increases with the increasing of the Freundlich equilibrium coefficient or the Langmuir equilibrium coefficient and the Biot number. With the decreasing of the dimensionless equilibrium concentration and the concentration exponent of surface diffusivities, the rate of liquid-phase adsorption will also rise.