Development of a New Metal Substrate for Lean NOx Trap

被引：0

作者：

Hosoe, Hiroki ^{[1
]}

Sakanushi, Masahiro ^{[1
]}

Tokushima, Kimihiro ^{[1
]}

Nishiyama, Tadao ^{[1
]}

Konya, Shogo ^{[2
]}

Kasuya, Masayuki ^{[3
]}

Kaneeda, Masato ^{[4
]}

Iizuka, Hidehiro ^{[4
]}

机构：

[1] Honda Res & Dev Co Ltd, Wako, Japan

[2] Nippon Steel Corp Ltd, Tokyo, Japan

[3] Nippon Steel Mat Co Ltd, Tokyo, Japan

[4] Hitachi Ltd, Hitachi, Ibaraki, Japan

来源：

SAE INTERNATIONAL JOURNAL OF FUELS AND LUBRICANTS | 2009年 / 1卷 / 01期

关键词：

Alumina - Chromium - Nitrogen oxides - Thermal aging - Durability;

D O I：

10.4271/2008-01-0806

中图分类号：

U [交通运输];

学科分类号：

08 ; 0823 ;

摘要：

This paper presents a new substrate for Lean NOx Traps (LNT) which enables high NOx conversion efficiency, even after long-term aging, when using alkali metals as the NOx adsorber. When a conventional metal honeycomb is used as the LNT substrate, the chromium in the metal substrate migrates into the washcoat and reacts with the alkali metals after thermal aging. In order to help prevent this migration, we have developed a new substrate where a fine - alumina barrier is precipitated to the surface of the metal substrate. The new substrate is highly capable of preventing migration of chromium into the washcoat and greatly enhances the NOx conversion. The durability of the new substrate and emission test using a test vehicle are also examined.

引用

页码：318 / 325

页数：8

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