本文使用甲醇水蒸汽重組搭配田口實驗方法找出加熱溫度、水對甲醇莫耳比(S/C)與攜帶氣體體積流率的最佳化組合。本文中對三種控制因子取三種不同水準，加熱溫度將使用220、250與280 K，水對甲醇莫耳比(S/C)使用0.9、1.0和1.1，攜帶氣體使用氮氣，進氣量則分別為40、70與100 cm3/min。採用田口直交表及控制因子組合進行實驗，量測並記錄產氫濃度、CO濃度、CO2濃度及N2濃度後，計算其甲醇轉化率與產氫量。
本文使用田口實驗方法可大幅減少實驗次數，使其實驗成本降低並得到最穩定的結果及較佳的實驗再現性，並透過變異數分析(Analysis of variance，簡稱ANOVA)探討各控制因子對於產氫濃度、產氫量、甲醇轉換率、CO濃度、CO2濃度及N2濃度的影響程度，並找出對上述品質目標都有正面影響的因子及貢獻度，分別得到對應各品質目標的最佳化因子組合。
本研究預計產出2 L/min的氫氣，因此將噴嘴設定甲醇水溶液流率為3.1 cm3/min，實驗結果顯示，當S/C比為0.9、攜帶氣體體積流率為40 cm3/min、反應溫度為280℃時，得到最高氫氣產量為0.074 mole/min，相當於108.8公升/hr。理論上質子交換膜燃料電池對氫氣的使用效率約為70 %，因此1000瓦的質子交換膜燃料電池實際所需的氫氣量為33.3 mole/hr。由此推斷出，本文產生的氫氣量為4.44 mole/hr，可供應133.34瓦的質子交換膜燃料電池使用。

This study uses methanol steam reforming with Taguchi method to identify the heating temperature, steam to carbonate ratio (S/C) with carrier gas volume flow rate corresponding to each quality objective optimization factor combinations. In this study, three different control factors will select three different levels, heating temperature with the 220, 250 and 280 K, steam to carbonate ratio (S/C) with 0.9, 1.0, and 1.1 using N2 carrier gas with the volume flow rate of 40, 70 and 100 cm3/min. Using Taguchi orthogonal arrays and control of factor combinations performs the experiment, measures, and records the hydrogen concentration, CO concentration, CO2 concentration, and N2 concentration to calculate methanol conversion rate and hydrogen production efficiency.
This study uses Taguchi method to greatly reduce experimental runs so it can decrease cost and obtain the most stable results and better repeatability. In addition, the influence level of each control factor on hydrogen production concentration, hydrogen production efficiency, methanol conversion rate, CO concentration, CO2 concentration, and N2 concentration is analyzed through Analysis of variance (ANOVA). Furthermore, the positive impact factors and contribution on level quality objective are identified and the optimal factor combinations corresponding to each quality objective are obtained.
The results show that when the nozzle is set at volume flow rate of methanol aqueous solution of 3.1 cm3/min, S/C ratio of 0.9, volume flow rate of carrier gas of 40 cm3/min, and the reaction temperature of 280 ℃, the highest hydrogen production is 0.074 mole/min, which is equivalent to 108.8 liters per hour of hydrogen generation. The proton exchange membrane fuel cells for hydrogen use efficiency is theoretically about 70 %, so 1000 watts of proton exchange membrane fuel cell requires 33.3 mole/hr for the actual amount of hydrogen. It is thus inferred that this amount of hydrogen generated in 4.44 mole/hr, will be able to supply the use for 133.34 watts of proton exchange membrane fuel cell.

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