FACE - Novel Integrated Fuel Reformer-Aftertreatment System for Clean and Efficient Road Vehicles
Lead Research Organisation:
Brunel University London
Department Name: Mechanical and Aerospace Engineering
Abstract
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Organisations
Publications
Kovacev N
(2023)
The synergy between substrate architecture of 3D-printed catalytic converters and hydrogen for low-temperature aftertreatment systems
in Chemical Engineering Science
Kovacev N
(2021)
Effect of the preparation techniques of photopolymerizable ceramic slurry and printing parameters on the accuracy of 3D printed lattice structures
in Journal of the European Ceramic Society
Kovacev N
(2020)
Effects of the internal structures of monolith ceramic substrates on thermal and hydraulic properties: additive manufacturing, numerical modelling and experimental testing
in The International Journal of Advanced Manufacturing Technology
Kulkarni A
(2020)
Insights on the morphology of air-assisted breakup of urea-water-solution sprays for varying surface tension
in International Journal of Multiphase Flow
| Description | Urea-based selective catalytic reduction (SCR) system is widely used to reduce NOx emission from diesel engines. The NOx conversion efficiency, as well as the adverse effects of wall-wetting is mainly influenced by the atomization characteristics of urea water solution (UWS). Under extreme winter conditions, the UWS can reach temperatures as close as its freezing temperatures. Under these adverse weather conditions the flow and spray characteristics of UWS are not well defined. In order to gain an understanding of these factors, an attempt has been made in this work to study the effect of varying the temperatures of UWS to evaluate the spray characteristics of UWS used in SCR systems. In this work, the temperatures of UWS were varied from 20°C to -10°C to consider the variations in the ambient temperatures from normal up to freezing point of UWS. Effect of temperature of UWS was significant at lower gauge pressures (?P) of the atomizing air. Bag breakup was observed at 20°C and ?P= 500 mbar condition in near-nozzle region of the spray. On the other hand, almost intact liquid core was observed at -10°C and 500 mbar condition suggesting poor atomization of UWS spray. This observation was confirmed in drop-size distributions where large number of big droplets was observed at -10°C and low ?P conditions. Drop-size distributions improved with increase in ?P at all temperature conditions showing marginal influence of temperature of UWS at high ?P conditions. This underlines the need of operating UWS systems at high ?P conditions to mitigate the effect of sub-atmospheric temperatures UWS spray characteristics. |
| Exploitation Route | Design and operation guidelines for SCR systems for IC engine NOx emissions control. |
| Sectors | Energy,Environment,Transport |
| Description | The results/findings have been communicated to industry and the impact on the design and operation guidelines for SCR systems for control of NOx emissions are to be explored further using facilities developed as part of the project. |
| First Year Of Impact | 2022 |
| Sector | Energy,Environment,Transport |
| Impact Types | Societal,Economic |