Superheating of kerosene-surfactant-water interface formed in capillary

Journal Article · Mon Mar 01 00:00:00 EST 1993 · Journal of Colloid and Interface Science; (United States)

DOI:https://doi.org/10.1006/jcis.1993.1098· OSTI ID:6199323

Kitamura, Y; Huang, Q; Takahashi, T ^[1]

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1. Okayama Univ. (Japan)

To provide fundamental information about the microexplosion of emulsified fuels, the effect of surfactants on the superheating of a kerosene-water interface was experimentally investigated. Surfactants such as Span 80, NPE[sub 2], NPE[sub 5], and NPE[sub 7.5] were used. The three-layer sample was prepared in a capillary; the bottom layer was kerosene, the middle layer was water, and the upper layer was kerosene. The surfactants were dissolved in the upper kerosene layer. The 30-40 samples were used to determine the superheating temperature distribution. The superheating temperature decreases with increasing concentration of surfactant and approaches a constant distribution over a critical concentration. The superheating temperature also depends on the hydrophilic group of NPE[sub x]. To explain such an effect, the authors assumed that the surfactant was absorbed on the interface and accelerated the nucleation rate. The authors suggest a modified nucleation rate which includes the surface coverage by a surfactant. The model predicts that the presence of surfactants reduces the superheating temperature and makes the distribution broader. The prediction from this model is in good agreement with the experimental data.

• OSTI ID: 6199323
• Journal Information: Journal of Colloid and Interface Science; (United States), Vol. 156:1; ISSN 0021-9797
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
02 PETROLEUM
KEROSENE
COMBUSTION KINETICS
SUPERHEATING
CAPILLARY FLOW
EMULSIONS
EXPERIMENTAL DATA
LAYERS
MATHEMATICAL MODELS
NUCLEATION
SURFACTANTS
TEMPERATURE DISTRIBUTION
WATER
CHEMICAL REACTION KINETICS
COLLOIDS
DATA
DISPERSIONS
DISTILLATES
ENERGY SOURCES
FLUID FLOW
FOSSIL FUELS
FUELS
GAS OILS
HEATING
HYDROGEN COMPOUNDS
INFORMATION
KINETICS
LIQUID FUELS
NUMERICAL DATA
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
REACTION KINETICS
400800* - Combustion
Pyrolysis
& High-Temperature Chemistry
025000 - Petroleum- Combustion