The Studies of the Treatment of Motorcycle Catalyst over Exhaust Composition

• Main Authors: HUNG , YI - CHUN, 洪懿均
• Other Authors: CHANG, CHUNG-LIANG
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/watgmm

碩士 === 元培醫事科技大學 === 環境工程衛生系碩士班 === 107 === Motorcycle is a main transportation tool in daily life, and its exhaust gas can be treated with a three-way catalyst. This study aimed at catalytic activity test of C3H8 and NO concentrations in different exhaust gases, and compared with the catalyst performance before and after thermal degradation. Experimental results show catalyst can remove about 90% NO at a gas concentration of O2 2.3% at 250 ° C, and about 90% C3H8、NO at a gas concentration of C3H8 1000 ppm、NO 300ppm condition can achieve NO removal efficiency of nearly 90% at 250 °C To evaluate the thermal stability the catalyst, the catalyst is subjected to secondary thermal degradation, and its performance change is observed. In this study, the air-fuel ratio was calculated based on experimental operating conditions, and the effects of different air-fuel ratios on catalyst efficiency were investigated. It was found that when the air-fuel ratio is lower, it is advantageous for the catalyst to carry out the reduction reaction; and when the air-fuel ratio is higher, the catalyst is advantageously subjected to the oxidation reaction.