Seminar Series 1/2009: (iv) Imaging Technique for The Measurement of Droplet Size Distribution In A Highly Concentrated Emulsion.

(iv) Mr Jason Leong, PhD student, Mech. Eng, MUSC

Date: 2009-01-19
Time: 13:00 to 13:30
Venue: 9-3-01


(v) Immiscible liquid-liquid systems appear extensively in many industrial processes in the chemical and petrochemical industries and very often where reacting immiscible liquid-liquid systems are concerned, the interfacial area between the reactants plays a key role in controlling the rate of reaction i.e. increasing the interfacial area or decreasing the particle size of the dispersed phase will lead to an increase in reaction rate. Therefore, there is a need to quantify the size distribution of particles in these systems. An example of a practical system that would benefit from such measurements is a methanol-palm oil system in the production of biodiesel. In the early stages of reaction, the retarding factor to efficient mass transfer is the interfacial area between the two reactants and therefore control of the methanol droplet size is important. However, as the concentration of the dispersed phase increases, there is an added level of complexity in the measurement as the current measurement techniques for quantifying droplet sizes in emulsions are optical based. A review of possible optical measurement techniques was conducted which included microscopy, the Focused Beam Reflectance Method and a borescope technique. The borescope technique with a slight modification was found to be the most feasible technique to be implemented in this study.

About the Speaker

Dr Greg Sheard:

Dr Greg was graduated from Monash Clayton with PhD in Mechanical Engineering. From year 2005 - 2007, he was a post doctoral fellow - investigate blood flow in the kidney.

Dr Greg is currently a lecturer from Department of Mechanical & Aerospace Engineering, Monash Clayton since 2007.