228 PRODUCTION OF FUEL GAS BY PLASMA REACTOR IN A LIQUID(General Session IV) :

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We propose that plasma in a liquid be applied as a new technique to replace the gas-phase plasma. The purpose of this report is to produce fuel gas such as hydrogen or methane by plasma in liquid. The plasma in a liquid can be achieved by applying both ultrasonic vibration and microwave irradiation. The existence of bubbles in a liquid is important in order to generate plasma in a liquid. Since the molecular density of liquid is much higher than that of gas, we can expect much higher reaction rates by using chemical deposition of plasma in liquid than chemical vapor deposition (plasma CVD). Two kinds of hydrocarbon liquids and some waste oils were used as reaction liquids. The temperature of plasma estimated from the plasma spectrum is approximately 5000K. It was found that hydrogen was produced in all liquids. Up to 81% hydrogen production for the volume ratio was obtained when n-dodecane was used.

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