Mean drops size in the presence of cetyl trimethyl ammonium bromide in horizontal mixer settler

作者：Davoodi Nasab Payman; Abolghasemi Hossein^*; Safdari Jaber; Raji Asadabadi Maliheh

来源：Asia-Pacific Journal of Chemical Engineering, 2014, 9(1): 93-104.

DOI：10.1002/apj.1749

• impeller speed
• dispersed phase volume fraction
• mixer settler
• CTAB
• mean drop size

The mean drop size of toluene/water dispersion in the presence of cetyl trimethyl ammonium bromide (CTAB) as a cationic surfactant has been studied in a horizontal mixer settler. Two 45 degrees-pitched blade turbine impellers with four blades on a shaft were used to have completed mixing. Additionally, the influences of hydrodynamic parameters such as impeller agitation speed and dispersed phase volume fraction on the drops size were investigated. The results indicate that the presence of CTAB leads to a decrease in D-32 by about 46%, averagely. Furthermore, increase in the impeller speed from 450 up to 650 rpm causes D-32 to reduce by about 30%, and the decreasing rate of D-32 diminishes with increasing impeller speeds. Increase in the dispersed phase volume fraction gives rise to increase in the drops size. Finally, in order to predict the mean drop size, new modified correlations were provided, wherein the influence of CTAB concentration was introduced as a new parameter.

• 出版日期2014-1