Optimization of TWC Design for Various Engine Operation Conditions NE Chemcat Corporation

Format:

Book

Conference/Event

Author/Creator:

Toya, Toya, author.

Contributor:

Hara, Hiroyuki

Nagata, Makoto

Nakayama, Hiroki

Conference Name:

WCX SAE World Congress Experience (2019-04-09 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2019

Summary:

AbstractThree-way catalysts (TWCs) for gasoline-powered vehicles commonly contain Pt group metals (Pt, Pd, and Rh) as active components and Al2O3 or OSC as supports, with Pd and Rh being most frequently employed in view of their high thermal durability. Hybrid electric vehicles (HEVs) have been recently developed to meet strict fuel efficiency regulations, by using feature engines that are much more energy-efficient than those of conventional gasoline vehicles and lend themselves to fixed-point operation control. Therefore, the engine exhaust-induced stress experienced by TWCs in HEVs and the corresponding aging conditions are expected to differ from those in conventional vehicles, which, in turn, should be reflected by a change in the optimal catalyst design. Herein, to facilitate the design of optimum next-generation TWCs, we investigate the deterioration of these catalysts (Pt, Pd, Rh supported on Al2O3 or OSC) under various conditions reflecting different engine operation modes. The results shown that Pt catalysts are inferior to Rh and Pd catalysts after conventional high-temperature aging, while Pt/OSC outperforms Pd/OSC under low-temperature aging conditions. Thus, this work is expected to aid the design of TWCs for various engine operating conditions

Notes:

Vendor supplied data

Publisher Number:

2019-01-1290

Access Restriction:

Restricted for use by site license