Development of a computer code for the dynamics of a charcoal bed for multicomponent system

Abstract

It is important to control the release of radioactive gas to the environment for the safety aspects and envirinmental protection. In this these the removal mechanism of multicomponent fission product by activated charcoal bed was investigated. In order to analyze the dynamics of charcoal bed, a new computer code, named MCAD-AC (Multi Component Adsorption Dynamics-Activated Charcoal), has been developed. Both intraparticle and interparticle diffusional resistance were considered in the calculational model. A generalized mathematical model consisting of 4N (N: number of component) partial differential equations was presented. The multicomponent gas phase adsorption has been expressed by Langmuir isotherm. The isotherm model was used to describe the adsorption equilibrium between the adsorbate and the absorbent. The numerical solutions have shown to agree well with experimental data which was published previously. This model and MCAD-AC code are expected to be useful in analyzing and designing the charcoal bed of nuclear power plants.