An Insight into Colloidal Gas Aphron Drainage Using Electrical Conductivity Measurement

• Main Authors: Maryam Moshkelani, Mohammad Chalkesh Amiri
• Format: Article
• Language: English
• Published: Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR 2008-09-01
• Series: Iranian Journal of Chemistry & Chemical Engineering
• Subjects: colloidal gas aphron (cga); electrical conductivity (ec); liquid drainage; drainage mechanism; sds; ttab
• Online Access: http://www.ijcce.ac.ir/article_6968_0d0fed8909799874773a5828106bea17.pdf
• ISSN: 1021-9986; 1021-9986

In the present  paper Electrical Conductivity (EC) of Colloidal Gas Aphron (CGA) suspensions was measured for anionic and cationic surfactants (Sodium Dodecyl Sulfate (SDS) and Tetradecyl Trimethyl Ammonium Bromide (TTAB)). Experiments were made for different concentrations of SDS (6, 8.1, 10 mM) and TTAB (2, 3.51, 5 mM). CGA drainage behavior was observed and measured using 1 liter measuring cylinder while recording EC. Studying the results, CGA drainage process was observed as four-phase mechanism, instead of three conventional phases. Regardless of surfactant concentration and type, the drainage process is divided in to absorption, macroscopic, bubble, and microscopic phases. Drainage rate did not change at the end of bubble phase, with the maximum value at the end of absorption phase. Results showed that electrical conductivity is a more sensitive property for studying CGA characterization.