A study on effect of wetting on mechanism of coalescence in a model coalescer
- Indian Inst. of Science, Bangalore (India). Dept. of Chemical Engineering
In order to depict the mechanism of coalescence in fibrous bed coalescers, a model coalescer was fabricated. Both water/oil and oil/water dispersion were run through this model coalescer to check for coalescence on PTFE and glass surfaces. The equilibrium contact angle and the dynamic contact angle of the dispersed drops were measured on these surfaces in the presence of the continuous phase. Coalescence was monitored using a microscope. Based on these observations a mechanism of coalescence in the model coalescer is proposed. Different modes of coalescence are correlated to the equilibrium contact angle and the dynamic contact angle. Deposition of dirt on the coalescing surface is observed to result in change of wettability, leading to redispersion of the already coalesced dispersed phase into larger droplets.
- OSTI ID:
- 6047876
- Journal Information:
- Journal of Colloid and Interface Science; (United States), Journal Name: Journal of Colloid and Interface Science; (United States) Vol. 159:1; ISSN 0021-9797; ISSN JCISA5
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
320303* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Equipment & Processes
COALESCENCE
DISPERSIONS
DROPLETS
FIBERS
FLUID MECHANICS
FLUORINATED ALIPHATIC HYDROCARBONS
GLASS
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROGEN COMPOUNDS
MECHANICS
OILS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PARTICLES
POLYETHYLENES
POLYMERS
POLYOLEFINS
POLYTETRAFLUOROETHYLENE
POTENTIALS
SURFACE POTENTIAL
WATER
WETTABILITY