PREDICTION  OF  BREAKTHROUGH  CURVES IN  FIXED-BED  ADSORBERS  OF ACTIVATED  CARBON  FIBER  (Ⅰ) EXACT SOLUTION AND APPROXIMATE  SOLUTIONS

Xiu Guohua.Li Ping and Jin Ge(Department of Chemical Engineering; Shenyang Institute of Chemical Technology; Shenyang 110021)

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PREDICTION OF BREAKTHROUGH CURVES IN FIXED-BED ADSORBERS OF ACTIVATED CARBON FIBER (Ⅰ) EXACT SOLUTION AND APPROXIMATE SOLUTIONS

更新时间：2025-12-16

- PREDICTION OF BREAKTHROUGH CURVES IN FIXED-BED ADSORBERS OF ACTIVATED CARBON FIBER (Ⅰ) EXACT SOLUTION AND APPROXIMATE SOLUTIONS
- CIESC Journal Issue 3, (1997)
- 作者机构：
  
  沈阳化工学院化工系,沈阳化工学院化工系,沈阳化工学院化工系沈阳110021,沈阳110021,沈阳,110021
- 作者简介：
- 基金信息：
- DOI：
  CLC： 647.3
- Online First：25 June 1997，
  
  Published：25 June 1997
- 稿件说明：
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Xiu Guohua.Li Ping and Jin Ge(Department of Chemical Engineering, Shenyang Institute of Chemical Technology, Shenyang 110021). PREDICTION OF BREAKTHROUGH CURVES IN FIXED-BED ADSORBERS OF ACTIVATED CARBON FIBER (Ⅰ) EXACT SOLUTION AND APPROXIMATE SOLUTIONS[J]. CIESC Journal, 1997, (3).
DOI：

Xiu Guohua.Li Ping and Jin Ge(Department of Chemical Engineering, Shenyang Institute of Chemical Technology, Shenyang 110021). PREDICTION OF BREAKTHROUGH CURVES IN FIXED-BED ADSORBERS OF ACTIVATED CARBON FIBER (Ⅰ) EXACT SOLUTION AND APPROXIMATE SOLUTIONS[J]. CIESC Journal, 1997, (3). DOI：

摘要

针对活性炭纤维吸附填充床

当吸附等温方程为线性时

考虑轴向弥散、纤维内扩散以及纤维外对流传质阻力

获得了阶跃进样时突破曲线的精确解以及拟对数概率密度函数近似解和二次方近似解。并在讨论模型参数对突破曲线影响的同时

对精确解和两种近似解进行了比较。结果表明

在较宽的模型参数范围内

两种近似解与精确解均吻合较好

但二次方近似解复杂

计算困难;而拟对数概率密度函数近似解简单

计算方便。

Abstract

For the linear adsorption isotherm

an exact solution for the prediction of breakthrough curves (step response) in fixed-bed adsorbers packed with activated carbon fiber is obtained

that takes into account axial dispersion

intrefiber diffusion and external convective mass transfer resistance. The effects of model parameters on the breakthrough curves are discussed. Two kinds of approximate solutions

i. e.

the parabolic profile approximation and the quasi -log normal distribution approximation are also obtained. The results show that the two approximate solutions are in good agreement with the exact solution over a wide range of parameters of Bi

Pe and the bed length parameter θ. The quasi -log normal distribution approximate solutionis a simple

rapid approximate solution for the calculation of breakthrough curves.

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