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HCA AND TWC HYBRID SYSTEM FOR REDUCING COLD-START EMISSION  

Lee, S.C. (College of Environment ＆ Applied Chemistry, Kyung Hee University)
Jang, J.H. (College of Environment ＆ Applied Chemistry, Kyung Hee University)
Lee, B.Y. (College of Environment ＆ Applied Chemistry, Kyung Hee University)
Bae, J.H. (Heesung Engelhard Co.)
Choung, S.J. (College of Environment ＆ Applied Chemistry, Kyung Hee University, Industrial Liaison Research Institute, Kyung Hee University)
Publication Information
International Journal of Automotive Technology / v.5, no.1, 2004 , pp. 1-7 More about this Journal
Abstract
In line with the Super Ultra Low Emission Vehicle (SULEV) regulation, the main idea in this study has been focused on the utilization of hydrocarbon adsorber (HCA) to adsorb the excess hydrocarbons emitted during a period of engine cold-start, As main recipes of HCA materials, many types of zeolite as well as the combination of alumina and precious metals were used, Representative physico-chemical factors of zeolite such as acidic and hydrophobic properties were characterized. The optimum recipe of HCA materials was also determined. Among the acid properties of zeolites, the Si/Al ratio was found to be the most important factor to get higher hydrocarbon adsorption capacity.
Keywords
HCA; Zeolite; SULEV; Hybrid system;
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