| Summary: | 碩士 === 大葉大學 === 電機工程學系 === 97 === This thesis focuses on using plasma to reform fuels into synthetic gases; and then analyzes and investigates the performance of the plasma reformer. This study designs pulsed plasma arc reformer and reforms the fuels (methane CH4, liquefied petroleum gas LPG) and water. Through plasma ionization, these fuels and water are being converted into hydrogen-rich synthetic gases.
This study includes design of plasma arc, design of fuel feeding system, experimental methods, measurement, data acquisition, gas analyses, etc. The plasma arc system includes body housing, pressure relief valve, electrode, AC motor, frequency adjuster, high voltage coil . The fuel feeding system includes supersonic oscillator, flowmeter, flow controller, etc.. The measurement analysis system includes gas chromatography (GC), voltmeter, AC ammeter and so on. The investigated parameters include the fuel selection (methane, LPG), fuel feeding rate (35~300 mL/min), power input (15~115 W), electrode number, the electric discharge method (electrode shapes), distance between electrodes (12~24 mm), electric arc frequency (15~240 Hz), etc.
The experimental results indicate that reducing fuel feeding rate, increasing numbers of electrode pair, needle-to-flat plane discharge, electric arc frequency (60Hz) and electric arc length (16 mm), moderate humidification, etc. may increase hydrogen concentration and hydrogen yield.
In all, the methane has the best hydrogen concentration of 60 % and hydrogen yield of 48 %; and LPG has the best hydrogen concentration of 54 % and hydrogen yield of 27 %.
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