本研究主要目的為利用汽車引擎所排放出的廢氣，提供甲醇重組器進行重組反應產出富氫氣體，探討富氫氣體和汽油混合摻燒後，對於汽車性能和排放汙染之改善研究，氫氣為一乾淨能源，燃燒後產物主要為水，但目前產氫和儲氫方面仍有問題須克服，因此利用車載重組產氫解決上述問題。甲醇重組器屬於水蒸氣重組法，藉由廢熱回收的方式，將汽車排氣廢熱做為提供甲醇重組器重組反應的能量，提高整體效率。
本研究主要分為兩部分，第一部分為測試甲醇重組器性能，第二部分則是車載重組器，並將產物富氫氣體導回摻燒測試實車整體性能，使用引擎動力計測試甲醇重組器性能的實驗結果顯示，在足夠的熱源下，甲醇重組器操作溫度達到280℃時，甲醇轉換效率介於90 %之間，而若當甲醇重組器操作溫度為260℃時，甲醇轉換率會隨著供應的甲醇水增加而有下降之趨勢，而在車載重組器部分，由實驗結果顯示，當添加富氫氣體後，當量比下降至0.8左右，在不同定車速下添加7%之氫氣百分比，整車之輸出功率改善4.64 %以上，制動燃油消耗率改善7.81%以上，在排污染方面，一氧化碳和二氧碳皆有下降之趨勢，而氮氧化物則會因為燃燒室內溫度升高而有上升之趨勢。

The aim of the study is using exhaust gas discharged by gasoline engine to provide methanol reformer to produce hydrogen-rich syngas which is blended with gasoline to improve cars’ performance and polluted emission. Hydrogen, which forms water after combustion, is one of clean energy. However, the current difficulties of producing and storing hydrogen need to be overcome. Therefore, utilizing onboard methanol reforming to produce hydrogen can solve the problem mentioned above. Methanol steam reforming is an endothermic reaction. It raises efficiency by recycling exhaust gas waste heat as energy which provides to the requirement of methanol reformer.
This study separates into two parts. One is to test performance of methanol reformer; the other is to test car’s performance by mixing hydrogen-rich syngas into cylinder from the onboad reformer. The consequence of utilizing engine dynamometer tests methanol reformer shows methanol conversion efficiency is about 90% as reformer temperature at 280℃. Then at 260℃, it shows reformer conversion efficiency is lower as methanol mass flow rate increases. For onboard reformer, when adding hydrogen-rich syngas, the equivalence ratio decreases to 0.8. Also in different constant speed adding 7% hydrogen, the power output efficiency improves more than 4.46%, the BSFC improves more than 7.81%. For polluted emission, CO and CO2 decrease, but NOx raises because of higher combustion chamber temperature.

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