Experimental determination and predictions of breakthrough curves in a fixed bed of silica gel using the transfer unit approach

A semi-empirical model was developed to predict the breakthrough curves of moisture adsorption on silica gel under different operating conditions. The model requires only the basic physical and transfer properties of the flow ing gas stream. Experimental breakthrough curves were determined in this st udy for correlating some model parameters. These dynamic experiments were c arried out with different values of the gas velocity, the inlet humidity, a nd the properties of the adsorbent. The breakthrough curves of the modified silica gel with neutron flux in a previous study were used to verify the p roposed model. It is feasible to develop a single adsorption model to simul ate the fixed-bed breakthrough curves for original and modified silica gels . The results show that the complex breakthrough curves can be predicted an d are in very good agreement with the experimental data.