OW-emulsions, production and stability

Name: Aroonrat Poonyaratanasrikhajon.

LCSH: Emulsions -- Stability.

LCSH: Oil pollution of water.

Abstract: Emulsions appear quite often in the chemical industry. Emulsions are the mix-ing of two immiscible liquids. One of those forms droplets and is called dis-persed phase and is immersed into the other one called continuous phase. To produce fine emulsions the droplet size of the dispersed phase should be reduced as much as possible. To do so mechanical devices help to reduce the droplet size in liquid-liquid dispersions, but it is not possible to produce stable emulsions using this devices. The high agitation rate helps to decrease droplet size of emulsions. To produce stable emulsions, surfactants are an important substance. In this work, the emulsion is produced using Shellsol K, water, and an anionic surfactant (4-Dodecylbenzene sulfonate acid, DBSA). The optical cell and the ultrasonic scanner are used to investigate the influence of the agitation rate, the oil concentration and the surfactant concentration on the stability of o/w emulsions. The influence of oil concentration (hold-up) and agitation rate were investigated based on the settling time. For non-surfactant systems, the set-tling time increases with increasing hold-up because the system shows a very slow coalescence velocity. The increase of the agitation rate shows an in-crease in settling time. The limitation of hold-up is less than 0.5 because phase inversion occurs. In the surfactant system, the stability of emulsions increases with increasing DBSA concentration. The critical micelle concentration (CMC) is the limitation of the surfactant concentration

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Name: Siebenhofer Matthaus

Role: Thesis advisors.

Name: Macher-Ambrosch Robert

Role: Thesis advisors.

Created: 2016

Modified: 2021-03-08

Issued: 2021-03-08

วิทยานิพนธ์/Thesis

application/pdf

eng

DegreeName: Master of Engineering

Level: Master's Degree

Descipline: Chemical and Process Engineering (International Program)

Grantor: King Mongkut's University of Technology North Bangkok

©copyrights King Mongkut's University of Technology North Bangkok

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