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International Journal of Automotive Technology > Volume 1(2); 2000 > Article
International Journal of Automotive Technology 2000;1(2): 89-94.
G. S. SON, S. H. KO, K. Y. LEE
Institute for Advanced Engineering
As a promising catalyst reducing cold start emissions of automobiles, a photocatalyst system has been studied. Since the photocatalyst is only activated by UV wavelength light, it needs no heat energy like a conventional TWC, therefore no light-off time. However, as a cold temperature catalyst to treat cold start emissions of a vehicle, previous studies on characteristics of photocatalyst have room for improvement in terms of performance and durability subject to aging conditions and exhaust gas conditions. In this study, additive catalysis for photocatalyst have been investigated from the viewpoints of performance and durability improvement. Eleven different coating samples were prepared with the combination of six kinds of additives and two kinds of photocatalyst materials. Then these samples were aged with a hydrothermal aging process. The performance of these samples was measured on a model gas apparatus with simulated exhaust gases. The durability was also analyzed with X-ray diffraction meter.
Key Words: Photocatalyst, cold Start Emission, Additive Catalysts, Conversion, Durability
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