| Summary: | 碩士 === 國立臺北科技大學 === 環境工程與管理研究所 === 96 === In addition to high density of vehicle number per unit land area in Taiwan, the driving conditions are not very well in the city. Furthermore, poor inspection and maintenance cause the vehicles to become one of the important sources of air pollution. Different kinds of pollutants emitted from vehicle pose serious effects to human health and the environment. Moreover, driving vehicle with low control efficiency catalyst generates more air pollutions into atmosphere.
In Taiwan, the study of catalyst has been researching about industrial catalyst but merely focused on dispersion of the noble metal. The feasibility of catalyst activation regeneration technology of the motorcycle was not well discussed.
According to these reasons, we used the four-stroke motorcycle engine (125 c.c.), dynamometer, electrical low-pressure impactor (ELPI), micro-orifice uniform deposit impactor (MOUDI) and automotive emission analyzer to set up the engine pollutants measurement. An Ion Chromatography (IC) and an Element Analyzer (EA) were used to analyze characterization of particles before and after regeneration of deactivated catalyst.
The results suggested that catalyst activation increased as regeneration temperature increased. The catalyst efficiency increased from 4.8% to 71.06% after regeneration by CH4 and the catalyst efficiency increased from 14.2% to 43.44% after regeneration by H2. When rotational speed at idle, the number concentration was 5×1000000 ~ 7×1000000 #/cm3 upstream catalyst and the number concentration was 3×10000 ~ 4×100000 #/cm3 downstream catalyst. The results suggested that catalytic converter can cause number concentration low.
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