Abstract
A sonochemistry process reforms heavy fuel oil or solid fuel into lighter liquid fuel. The sonochemistry is originated from the behavior of acoustic cavitation bubbles; the nucleation, growth, and violent collapse. Here, an instantaneous hot spot region with local temperature of several thousand Kelvin and pressure of several hundred Mega-Pascal is generated by the cavitation bubble collapse. This hot-spot causes the decomposition of carbon bond and the removal of nitrogen, aromatic series. The rate of sonochemical reaction is affected by vapor pressure of fuel, and thus is decreased for heavy fuels. Therefore, the authors have proposed the application of sonochemistry into heavy fuel oil mixed with higher volatility fuels, because the mixed fuels can improve volatility characteristics due to formation of two-phase region including both vapor and liquid phases. In this paper, the cavitation behavior of mixed fuel is clarified and the result shows that high efficiency fuel reformulation is accomplished by applying sonochemistry to mixed fuel.
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