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

• Main Authors: Cyong-Wun Shih, 施瓊雯
• Other Authors: Bing-Sheng Yu
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/phxv3m

碩士 === 國立臺北科技大學 === 資源工程研究所 === 102 === 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.