No abstract

In the present study, a stochastic model for the residence time distribution (RTD) in a coaxial counter current liquid-liquid impinging streams system has been developed. Simulations of droplets movements in the impinging spray systems determine the residence time distribution. Droplets dynamics has been formulated from the Boltzmann equation using direct simulation Monte Carlo (DSMC) method. The data predicted from the model has been correlated with the experimental results obtained from a coaxial counter current two impinging liquid-liquid steams apparatus. The reactor consisted of a cylindrical vessel made of Pyrex glass, length 60 cm and internal diameter 14 cm. The apparatus was equipped with two circular plates placed at the two ends of the reactor. Thus the length of the contact compartment could be varied by moving the plates away from or towards each other. Water and toluene were used as two immiscible liquid streams. These were sprayed into the reactor by applying pressurized nitrogen via special ducts, placed behind the feed nozzles. The degree of agreement between the experimental results and those predicted from the model was 85%.