火花放電之電漿反應對於甲烷產出氫氣之特性研究

Study on Plasma Reaction of Methane into Hydrogen by Spark Discharge

施宏杰(Hung-Chieh Shih)

指導教授 ： 洪榮芳

崑山科技大學/工程學院/機械工程研究所/碩士(2004年)

https://doi.org/10.6828/KSU.2004.00017

摘要

本文針對甲烷燃料於電漿轉換器的氫氣產出特性進行探討。研究方法以火花放電方式產生電弧，使碳氫燃料與含氧氣體混合物離子化之後，產生部分氧化及重組效應以產出富氫氣體。
整個系統包括電漿轉換器、燃料及空氣供應系統、數據擷取系統及量測分析系統等。電漿轉換器包括訊號產生器、變壓線圈、跳火電極、反應室、集氣室；燃料及空氣供應系統包括噴嘴、流量控制器及流量計等；量測分析系統包括氣相層析儀、示波器、電壓錶、電流勾錶等。探討參數包括，燃料進料流率(20~100 mL/min)、O/C比(0.1~0.5)、輸入必v(10~81W)、電弧頻率(57~250Hz)、反應通道內徑(5~15mm)、背景氣體(空氣、Ar+O2、CO2)等。
由實驗結果得知，欲提升氫氣產出濃度，可增加電弧頻率、降低O/C比與甲烷進料率；欲提升氫氣產出效率，可增加電弧頻率，降低甲烷進料率，O/C比對氫氣產出效率則較無明顯影響。背景氣體方面，以氬氣加氧氣、或以二氧化碳對甲烷進行重組，產生的氫氣濃度，皆比使用空氣重組甲烷者佳。另外，電弧長度越長，氫氣產出濃度與產出效率明顯越高。反應通道尺寸方面，則發現不同甲烷進料率，均有其較佳的反應通道尺寸。再者，於氣體滯留時間方面的探討，氣體於電漿轉換器內滯留時間越長，氫氣產出濃度與產出效率越高。整體而言，最佳氫氣產出濃度可達45﹪、氫氣產出效率為0.6左右。

關鍵字

電漿轉換器 ； 富氫氣體 ； 甲烷

並列摘要

A plasma fuel converter adopted to produce hydrogen fuel has been investigated in this study. The methodology was using a high voltage electric arc generator to ionize the mixture of methane fuel and carries gas with oxygen, which was then reformed into a hydrogen-rich gas.
The test equipment included a plasma converter, a fuel supply system, an air supply system, a data acquisition system and a measuring system. The experimental parameters were flow rate of fuel supply (20~100mL/min), O/C ratio (0.1~0.5), input power (10~81W), arc frequency (57~250Hz), diameter of reaction passage (5~15mm) and carrier gas (air, Ar+O2, CO2).
The results showed that the plasma system with higher arc frequency, lower O/C ratio and lower methane supply rate generated higher hydrogen concentration. Simultaneously, the system with higher arc frequency and lower methane supply rate also caused higher hydrogen yield, however, the effect of O/C ratio was not obviously. Moreover, higher hydrogen concentration was obtained with the carrier gas of Ar+O2 or CO2 than by the carrier gas of air. It also showed that longer arc length produced higher hydrogen concentration. In addition, it existed optimum diameter of reaction passage for each methane supply rate. Furthermore, higher hydrogen concentration was obtained with longer resident time of the mixture in the reaction chamber. As a whole, the best hydrogen concentration production was 45%, and 0.6 hydrogen yielded by this plasma system.

並列關鍵字

hydrogen-rich gas ； plasma converter ； methane

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