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Advanced Ceramic Substrate: Catalytic Performance Improvement by High Geometric Surface Area and Low Heat Capacity
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Abstract
Catalytic performance can be improved by increasing geometric surface area (GSA) and reducing bulk density (BD), namely heat capacity, using high cell-density / thinwall advanced ceramic substrates. The advanced substrates, such as 3 mil/600 cpsi and 2 mil/900 cpsi have improved the catalytic performance over the conventional substrates, and are expected to help in complying with future emission regulations, as well as catalyst downsizing. This paper describes the effects of GSA and BD using Pd-based catalysts. The reduction of hydrocarbons emissions was demonstrated significantly at close-coupled location, and dual bed design was proven effective. The effectiveness at under-floor location was not as significant as the close-coupled location.
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Citation
Umehara, K., Yamada, T., Hijikata, T., Ichikawa, Y. et al., "Advanced Ceramic Substrate: Catalytic Performance Improvement by High Geometric Surface Area and Low Heat Capacity," SAE Technical Paper 971029, 1997, https://doi.org/10.4271/971029.Also In
References
- Higuchi N. Nakamura T. “Ceramic Honeycomb,” Industrial Material 31 1984
- Howitt J. “Thin Wall Ceramics as Monolithic Catalyst Supports,” SAE Paper 800082 1980
- Mochida S. “Ceramic Honeycombs in the Spotlight,” Chemical Engineering MOL March 1984
- Yamamoto H. Horse H. Kitagawa J. Machida M. “Reduction of Wall Thickness of Ceramic Substrate for Automotive Catalysts,” SAE Paper 900614 1990
- Yamamoto H. Kato F. Kitagawa J. Machida M. “warm-up Characteristics of Thin Wall Honeycomb Catalysts,” SAE Paper 910611 1991
- Machida M. Yamada T. Makino M. “Study of Ceramic Catalyst Optimization for Emission Purification Efficiency,” SAE Paper 940784 1994
- Hijikata T. Kurachi H. Katsube F. Van Honacker H. “Thermal Reliability and Performance Improvement on Close-Coupled Catalytic Converter,” SAE Paper 960565 1996
- Sword I. Morgan G. O'Sullivan R. Winterbone D. Machida M. “Development of a High Performance Catalytic Converter for a Turbocharged Gasoline Engine Using Thin Wall Ceramic Technology,” SAE Paper 930943 1993
- Tamura N. Matsumoto S. Kawabata M. Kojima M. Machida M. “The Development of Automotive Catalyst with Thin Wall (4 mil/400 cpsi) Substrate,” SAE Paper 960557 1996
- Umehara Kazuhiko Hijikata Toshihiko Katsube Fumio “Catalytic Performance Improvement by High Cell Density / Thin Wall Ceramic Substrate,” ISATA Paper 96EN044 1996