A NOx reduction system using highly active double-layered NOx trap catalysts with various regeneration properties

Tadao Nakatsuji, Juhana Ruotoistenmäki, Noriko Nishiaki, Go Fukushima, Kunihiko Uchimura

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Abstract

A double-layered catalyst, which is composed of top-layered and bottom-layered catalyst components, i.e., some materials as a catalyst promoter and NOx trap catalyst components, respectively, has been examined at 300 to 550°C in rich/lean operations in the presence of 50ppm of SOx to know NOx reduction performance and SOx tolerance. Some top-layered catalysts have given high durability to the NOx reduction system. The durability depended on the material for the promoter and the NOx trap catalyst component and reaction temperature. Some combinations showed high tolerance at 300°C. However, in a long term the combinations deteriorated. At 550°C, all combinations deteriorated in a short term. Nevertheless, a combination could be regenerated partially at 400°C and perfectly at 500°C in reducing conditions.
Original languageEnglish
Number of pages6
JournalSAE Technical Paper Series
Issue number2003-01-1158
DOIs
Publication statusPublished - 2003
MoE publication typeA1 Journal article-refereed
EventSAE 2003 World Congress & Exhibition - Detroit, United States
Duration: 3 Mar 20026 Mar 2002

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