Suppression of evaporation of hydrocarbon liquids and fuels by films containing aqueous film forming foam (AFFF) concentrate FC-196. Interim report
Suppression of evaporation of hydrocarbon liquids and fuels by aqueous film containing a fluorocarbon surfactant has been examined as a function of film thickness, time, and hydrocarbon type. The hydrocarbon liquids included the homologous series of n-alkanes from pentane to dodecane, aromatic compounds, motor and aviation gasolines and jet fuels JP-4 and JP-5, and Navy distillate fuel. The surfactant solution used to form the films was a 6 percent solution of aqueous film forming foam (AFFF) concentrate FC-196. Films of the surfactant solution, ranging in thickness from 5 to 100 micrometers, were placed on the surface of the hydrocarbon liquid to test the ability of the film to suppress evaporation over a 1-hr period. Results indicated that for the n-alkanes and the hydrocarbon fuels a certain critical thickness of surfactant solution was required for optimum vapor suppression. In comparison with the n-alkanes, it was considerably more difficult to suppress evaporation of the aromatic compounds. (GRA)
- Research Organization:
- Naval Research Lab., Washington, D.C. (USA)
- OSTI ID:
- 7196329
- Report Number(s):
- AD/A-006650; NRL-7842
- Country of Publication:
- United States
- Language:
- English
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