利用田口法最佳化銅基汽機車廢氣轉化觸媒之製備

Optimization of fabrication of copper-based catalyst for vehicle exhaust gas by Taguchi method

施瓊雯(Cyong-Wun Shih)

指導教授 ： 余炳盛

國立臺北科技大學/工程學院/資源工程研究所/碩士(2014年)

https://doi.org/10.6841/NTUT.2014.00078

摘要

現今的汽機車廢氣觸媒大部分都使用昂貴的白金（Pt）、鈀(Pd)等貴重金屬，本研究利用燃燒法合成混合不同元素的氧化物作為觸媒，以取代貴重金屬。
透過田口法直交表L18(21x37)進行規劃，以銅基添加Ce、Co、Mn、Cr、Zn、Ni、Al、Fe八種元素，製成不含貴金屬的銅基觸媒，以HORIBA廢氣分析儀進行機車廢氣檢測，結果顯示觸媒對於一氧化碳的平均轉換率最佳，最高可達59%，對於碳氫化合物的平均轉換率最高約為50%，而氮氧化合物的平均轉換率最高約為49 %。而經由田口品質分析最佳化配比所製成之觸媒催化結果顯示，一氧化碳轉換率約為51%，碳氫化合物轉換率約為60%，氮氧化合物轉換率約為60 %，可觀察到碳氫化合物與氮氧化合物轉換率明顯上升約10%，雖一氧化碳轉換率無提升，但是卻將實驗所規劃之範圍裡，將一氧化碳、碳氫化合物及氮氧化合物轉換率達到變異小、品質佳之最佳狀態，而再與最高轉換率商用觸媒相較(商用觸媒一氧化碳最高轉換率約為51%；碳氧化合物最高轉換率約為25%；氮氧化合物最高轉換率約為54%)，更加提升催化轉換率效果。

關鍵字

銅基觸媒 ； 田口法 ； 燃燒合成法

並列摘要

Most of the catalysts for vehicle exhaust gas usually rely on expensive noble metals such as platinum (Pt) and palladium (Pd). Using combustion synthesis method to mix different non-noble metal oxides to synthesize the catalysts. This study can be expected to reduce the amount of the noble metals.
Through Taguchi orthogonal array L18 (21x37) planned the copper-based catalysts to add eight elements such as Ce, Co, Mn, Cr, Zn, Ni, Al, Fe and the copper-based catalysts was made of no noble metals. The catalytic effect of motorcycle exhaust gas was detected by HORIBA exhaust gas analyzer. The catalysts showed the best average conversion rate of carbon monoxide was about 59% , the average conversion rate of hydrocarbon was about 50% , the average conversion rate of nitrogen oxides were about 49%. Through the optimization analysis of Taguchi quality characteristics showed that the catalyst of the conversion rate of the carbon monoxide could up to 51% , the conversion rate of hydrocarbons could up to 60%, and the conversion rate of nitrogen oxides could up to 60%. The results can be observed that hydrocarbons and nitrogen oxides conversion rate were significantly increased about 10%. Although the conversion rate of carbon monoxide had no upgrade, in the range of the planned experiments, the variations of carbon monoxide, hydrocarbons and nitrogen oxides conversion rates were small and the quality was much better. Compared with the commercial catalyst ( catalytic carbon monoxide conversion rate is about 51% , hydrocarbon conversion rate is about 25%, nitrogen oxide conversion rate is about 54% ), the conversion rate of optimized catalyst could be found the catalytic effect is more effective than commercial catalyst.

並列關鍵字

Copper-based catalysts ； Taguchi method ； Combustion synthesis method

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