THE NEW CONCEPT 3-WAY CATALYST FOR AUTOMOTIVE LEAN-BURN ENGINE - NOX STORAGE AND REDUCTION CATALYST

Authors
TAKAHASHI N SHINJOH H IIJIMA T SUZUKI T YAMAZAKI K YOKOTA K SUZUKI H MIYOSHI N MATSUMOTO S TANIZAWA T TANAKA T TATEISHI S KASAHARA K
Citation
N. Takahashi et al., THE NEW CONCEPT 3-WAY CATALYST FOR AUTOMOTIVE LEAN-BURN ENGINE - NOX STORAGE AND REDUCTION CATALYST, Catalysis today, 27(1-2), 1996, pp. 63-69
Citations number
9
Categorie Soggetti
Engineering, Chemical","Chemistry Applied","Chemistry Physical
Journal title
Catalysis today → ACNP
ISSN journal
09205861
Volume
27
Issue
1-2
Year of publication
1996
Pages
63 - 69
Database
ISI
SICI code
0920-5861(1996)27:1-2<63:TNC3CF>2.0.ZU;2-X
Abstract
The new concept 3-way catalysts for a lean-burn engine have been devel oped, and their NOx purification mechanisms have been studied. The cat alysts consist of precious metals, aluminum oxide and some other metal compounds such as NOX storage compounds. NOx is oxidized over the pre cious metals and stored as nitrate ion combined with NOx storage compo unds under oxidizing conditions. The stored NOx is reduced to N-2 unde r stoichiometric and reducing conditions. The NOx storage capacity is deteriorated by sulfur. The improved catalysts showed sufficient NOx c onversion durability in the Japanese 10-15 mode test.