本研究設計一組脈衝式燃料電漿轉換器,來探討各項參數對產出氫氣特性的影響。研究中利用脈衝火花放電方式產生電弧,讓碳氫燃料與空氣混合物離子化,以部分氧化來產出富氫氣體。 研究系統主要包含燃料電漿轉換器、燃料與空氣供應系統、數據擷取系統以及量測分析系統等。燃料電漿轉換器由訊號產生器、感應線圈及跳火電極、反應室、產出氣體收集室所構成;燃料及空氣供應系統內包含鋼瓶氣體、氣體流量計及噴嘴等;量測分析系統包括氣相色層分析儀、示波器、電流勾錶等。實驗參數包括O2/C比(0.2~0.6)、電弧頻率(200 Hz)、反應通道內徑(10~25 mm)、燃料進料流率(100~500 mL/min)、電極間隙(5 mm~10 mm)、陽極形狀、陽極材料等。 由實驗結果得知,採用反應室通道內徑、電極間隙、甲烷進料率等系統適當參數,對於氫氣產出濃度、氫氣產出流率等方面,皆有較佳之產出表現。此外,陽極採用圓錐形狀,可獲得最佳氫氣產出濃度。氣體於反應通道內空間速度越小,氫氣產出濃度越高。陽極表面之積碳會隨系統操作時間增長而增厚。至於陽極材料方面,經實驗測試結果發現對於產氫的影響差異並不大,而受O2/C比的影響則較為明顯。整體而言,本研究系統在參數適當化設定下,最高氫氣產出濃度可達38.42 Vol%、氫氣產出流率高可達143.58 mL/min。
This study was to design a plasma fuel converter and to investigate the effects of design parameters on the performance of this apparatus. The methodology was using a high voltage electric arc generator to ionize the hydrocarbon fuel and air mixture. The ionized gas was reformed into the hydrogen-rich gas. The system equipment included a plasma fuel converter, a fuel and an air supply system, a data acquisition system and a measuring system. The experimental parameters include O2/C ratio (0.2~0.6), fuel feeding rate (100 mL/min~500mL/min CH4), arc frequency (200Hz), reaction chamber diameter (10mm~25mm) , electrode gap (5mm~10mm) , anode shape and anode material. The results showed that higher concentration and production rate of hydrogen were obtained with a suitable diameter of reaction chamber、electrode gap and fuel feeding rate. It also showed the carbon deposit growth with operation time on the electrodes. Furthermore, adopting conical of anode can improve hydrogen production. As a whole, the best hydrogen concentration and production rate was 38.42Vol% and 143.58mL/min respectively by this system.