Mumtaz, Zarqoon, Farzam, Reza, Guan, Mang, Steiche, Patrick, Kirchen, Patrick et Mctaggart-Cowan, Gordon.
2025.
« Impact of hydrogen-diesel dual fuel combustion on the performance of aftertreatment system in heavy duty commercial truck ».
In Proceedings of the CSME-CFDSC-CSR 2025 International Congress (Montreal, QC, Canada, May 25-28, 2025)
Coll. « Progress in Canadian Mechanical Engineering », vol. 8.
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Résumé
Diesel engines are widely used in heavy-duty commercial vehicles due to their performance, efficiency and reliability. They use exhaust aftertreatment systems (EATS) to limit emissions of harmful pollutants including hydrocarbons, CO, PM, and NOx. To reduce GHG emissions, hydrogen can be added to the intake air, reducing diesel consumption and CO2 emissions. The hydrogen-diesel dual fuel (H2-DF) combustion impact exhaust composition and temperature. This study investigates how these changes influence the performance of the EATS in a heavy-duty commercial truck application. To assess the impact of H2-DF on EATS system performance, a Freightliner Cascadia equipped with a Hydra Energy Corp. co-combustion fueling system was tested on a chassis dynamometer in both diesel and H2-DF modes under steady-state conditions. The EATS consisted of a Diesel oxidation catalyst (DOC), a Diesel Particulate Filter (DPF), and a Selective Catalytic Reduction (SCR). The vehicle was tested under both conventional diesel and H2-DF operation, with constant engine speed of 1200 RPM and 200 N-m shaft torque. A corresponding model of the SCR was developed in 1-D simulation tool GT-SUITE to assess key sensitivity factors at the exhaust temperatures, composition and flow rate from the experimental testing. After treatment conditions and performance data were collected using on-vehicle NOx and temperature sensors and dedicated FTIR emissions equipment when the engine operation reached steady-state conditions. Emissions were measured either upstream or downstream of the EATS using the FTIR. On-vehicle NOx sensors located before the DOC and after the SCR supplemented the FTIR measurements.The low-load conditions led to relatively low exhaust system temperatures, leading to stabilization times of 5-8 minutes for the full EATS after the engine reached steady-state. The onboard NOx sensors and FTIR NOx results were found to be comparable within the range of uncertainty of the instruments. Temperature rise across the DOC was 50-60oC in the H2-DF case, significantly higher than for the diesel only case ~10oC, indicating enhanced DOC activity likely due to H2 slip. NOx conversion across the SCR was slightly higher for H2-DF than in diesel, The modelling results demonstrated sensitivity of SCR performance to stored ammonia, urea dosing rate, NO2/NO ratio, and system temperatures. The variability in the stabilization time for the EATS was attributed to differences in prior operating condition, ammonia stored in the catalyst, and NO2/NO ratio at the SCR inlet. The model results showed that all three factors strongly influence NOx conversion under the experimental operating conditions.
| Type de document: | Compte rendu de conférence |
|---|---|
| Éditeurs: | Éditeurs ORCID Hof, Lucas A. NON SPÉCIFIÉ Di Labbio, Giuseppe NON SPÉCIFIÉ Tahan, Antoine NON SPÉCIFIÉ Sanjosé, Marlène NON SPÉCIFIÉ Lalonde, Sébastien NON SPÉCIFIÉ Demarquette, Nicole R. NON SPÉCIFIÉ |
| Date de dépôt: | 18 déc. 2025 15:17 |
| Dernière modification: | 18 déc. 2025 15:17 |
| URI: | https://espace2.etsmtl.ca/id/eprint/32468 |
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