화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.18, No.5, 698-703, September, 2001
DOI10.1007/BF02706389  Export Citation
Adsorption Characteristics of HCA(Hydrocarbon Adsorber) Catalysts for Hydrocarbon and NOx Removals under Cold-Start Engine Conditions
Hae-Keun Seo, Jin-Woo Oh, Sung-Chul Lee, Jun-Yong Sung1, and Suk-Jin Choung†
  • School of Environmental and Applied Chemistry, KyungHee University, Suwon 449-701, Korea
  • 1LG Institute of Environment, Safety&Health, Seoul 120-140, Korea
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To meet the SULEV (Super Ultra Low Emission Vehicle) regulations, we have focused on the utilization of HCA (Hydrocarbon Adsorber) in order to adsorb the excess hydrocarbons emitted during a period of engine coldstart. As main recipes of HCA materials, many types of zeolite as well as a combination of alumina and precious metals were used. Representative physico-chemical factors of zeolite such as acidic and hydrophobic properties have been characterized and tried to find the optimum recipe of HCA materials. Among the acid properties of zeolites, the Si/Al ratio has been found to be the most important factor to achieve higher hydrocarbon adsorption capacity.
Keywords:Automotive Catalyst;Hydrocarbon Adsorber;Adsorption Characteristic;Zeolite;Hydrocarbon
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