AI Article Synopsis
- Improving the uniformity of the flow field in catalytic converters enhances the conversion of NO to NO₂, as shown by experimental validation of developed models.
- The improved catalytic converters demonstrate significant performance gains: 0.0643 increase in gas uniformity, 6.78% reduction in pressure drop, and a 7.0% increase in NO conversion rate compared to standard converters.
- Optimal configurations, such as a cell density combination of 700 cpsi/600 cpsi and a tapered height of 20 mm, result in the highest NO conversion rates, exceeding 72%, indicating practical implications for reducing vehicle emissions.
Article Abstract
Improving the flow field uniformity of catalytic converter can promote the catalytic conversion of NO to NO. Firstly, the physical and mathematical models of improved catalytic converter are established, and its accuracy is verified by experiments. Then, the NO catalytic performances of standard and improved catalytic converters are compared, and the influences of structural parameters on its performance are investigated. The results showed that: (1) The gas uniformity, pressure, drop and NO conversion rate of the improved catalytic converter are increased by 0.0643, 6.78%, and 7.0% respectively. (2) As the cell density combination is 700 cpsi/600 cpsi, NO conversion rate reaches the highest, 73.7%, and the gas uniformity is 0.9821. (3) When the tapered height is 20 mm, NO conversion rate reaches the highest, 72.4%, and the gas uniformity is 0.9744. (4) When the high cell density radius is 20 mm, NO conversion rate reaches the highest, 72.1%, and the gas uniformity is 0.9783. (5) When the tapered end face radius is 20 mm, NO conversion rate reaches the highest, 72.0%, and the gas uniformity is 0.9784. The results will provide a very important reference value for improving NO catalytic and reducing vehicle emission.
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| http://dx.doi.org/10.1007/s11356-021-15504-y | DOI Listing |
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