Effects of ultrasonic irradiation on the viscosity of fuel oils |
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Authors: | Makoto Nagai Hideto Seiyama Motomu Kasagi |
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Affiliation: | The National Defense Academy, Hashirimizu. Yokosuka, Kanagawa-ken, Japan |
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Abstract: | Fuel oil A, B and C, and a residual oil from vacuum distillation (R-Oil) have been irradiated with 25kHz ultrasonic waves (150W) at 50 °C for 10 h. The observed increases in the kinematic viscosity (Δ v%) are: fuel oil A, 0.3%; fuel oil B, 5.3%; fuel oil C, 17.6%; and R-Oil 5.5%. The value and sign of Δ v are found to change with the sample weight in the flask, l.r. measurements show that ultrasonic irradiation causes the intensities of CH2 and CH3 to decrease slightly. The ultrasonic energy appears to be used in the breaking-up and/or coupling of the petroleum molecules. |
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Keywords: | fuel oil ultrasonic irradiation polymerization viscosity |
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