Simple Estimation of Thermal Desorption Curves and Desorption Efficiencies of Multicomponent Organic Solvents from Activated Carbon -Studies on Thermal Desorption Method of Organic Solvent. VII.-

Abstract

A simple analytical method is proposed for obtaining thermal desorption curves and desorption efficiencies of binary mixtures of organic solvents from an activated carbon. Basic equations were obtained from mass balances in desorption column and adsorption isotherms assuming mass transfer rate to be infinite, and distribution of solvents in the column to be homogeneous in both gas and solid phases. Adsorption isotherm for pure solvent, which. has approximated by several straight lines, was extended to binary system. Thermal desorption experiments were carried out in the stream of nitrogen at 200°C. Although estimated values of initial adsorption rates tended to be higher than experimental values especially when initial adsorbed amounts were small, estimated desorption curves and desorption efficiencies agreed fairly well with experimental Ones.