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Hexagonal Cell Ceramic Substrates for Lower Emission and Backpressure
Technical Paper
2008-01-0805
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Stringent emission regulations call for advanced catalyst substrates with thinner walls and higher cell density. However, substrates with higher cell density increase backpressure, thinner cell wall substrates have lower mechanical characteristics. Therefore we will focus on cell configurations that will show a positive effect on backpressure and emission performance. We found that hexagonal cells have a greater effect on emission and backpressure performance versus square or round cell configurations. This paper will describe in detail the advantage of hexagonal cell configuration versus round or square configurations with respect to the following features:
- 1High Oxygen Storage Capacity (OSC) performance due to uniformity of the catalyst coating layer
- 2Low backpressure due to the large hydraulic diameter of the catalyst cell
- 3Quick light off characteristics due to efficient heat transfer and low thermal mass
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Citation
Segawa, Y., Hase, T., and Yoshida, T., "Hexagonal Cell Ceramic Substrates for Lower Emission and Backpressure," SAE Technical Paper 2008-01-0805, 2008, https://doi.org/10.4271/2008-01-0805.Also In
References
- Gulati Suresh T. “Performance Parameters for Advanced Ceramic Catalyst Supports” SAE 1999-01-3631
- Becker E. Robert et al. “Prediction of Catalytic Performance During Light-off Phase with Different Wall Thickness, Cell Density and Cell Shape” SAE 2001-01-0930
- Kanazawa T. et al. “Development of Three-way Catalyst Using Composite Alumina-Ceria-Zirconia” SAE 2003-01-0811
- Bhattacharya M. et al. “Mass-Transfer Coefficients in Washcoated Monoliths” AIChE Journal 50 2004 2939