Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 117, Issue 1-2, Pages 178-184Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.micromeso.2008.06.021
Keywords
Fast assay; Destructive extraction; Hydrocarbon trap catalyst; Beta zeolite
Categories
Funding
- Hyundai Motors Company
- Kia Motors Corporation
- Korea Science and Engineering Foundation [R0A-2007-000-20050-0]
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Libraries consisting of more than 100 zeolite samples were prepared and examined for developing a promising HC trap catalyst. Parallel adsorptions of toluene onto the catalyst samples were conducted over a 10 x 10 array reactor under dry and wet conditions with or without a heating process three knowledge-based conditions for developing an automotive catalyst during the cold-start period. FAU and BEA type zeolites revealed a high performance of toluene adsorption under the dry condition. However, FAU type zeolite significantly decreased the amount of toluene adsorbed in the presence of water in the feed gas stream, mainly due to the hydrophobicity of the catalyst surface. Over Beta type zeolites, the toluene adsorbed was found to be considerably preserved, even after forced desorption temperature-ramping to the warm-up condition of an automotive engine. Li, K, or Ag ion-exchanged Beta zeolites seem to be particularly promising as an HC trap catalyst. (C) 2008 Elsevier Inc. All rights reserved.
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