Application of Markov-Chain analysis and tanks in series model in mathematical modeling of non-Isothermal gas absorption of CO2 in a coaxial impinging streams absorber

In spite of the fact that the principles of impinging stream reactors have been developed for more than half a century, the performance analysis of such devices, from a viewpoint of the mathematical modeling, has not been investigated extensively. In this study two models are proposed to describe the performance of non-isothermal gas absorption of CO2 in a coaxial impinging streams absorber. The models are developed based on the Markov-chain analysis and the tanks in series model. The required parameters for each model are determined by using RTD data obtained in a coaxial impinging streams absorber and the governing equations are solved numerically. Comparison of the results of the models with available experimental data shows that the models successfully explain the behavior of a coaxial impinging streams absorber. Also, the effects of some operating parameters such as gas velocity, gas temperature and droplet size on the average rate of absorption are investigated. The results of this paper indicate that the efficiency of this system is higher than the conventional absorbers.