Version 1
: Received: 30 April 2024 / Approved: 1 May 2024 / Online: 1 May 2024 (05:39:48 CEST)
How to cite:
Serrano, J. R.; Piqueras, P.; Sanchis, E. J.; Conde, C. Analysis of Altitude and Ambient Temperature Effects on the Reactivity of Oxidation Catalysts in the Presence of H2. Preprints2024, 2024050045. https://doi.org/10.20944/preprints202405.0045.v1
Serrano, J. R.; Piqueras, P.; Sanchis, E. J.; Conde, C. Analysis of Altitude and Ambient Temperature Effects on the Reactivity of Oxidation Catalysts in the Presence of H2. Preprints 2024, 2024050045. https://doi.org/10.20944/preprints202405.0045.v1
Serrano, J. R.; Piqueras, P.; Sanchis, E. J.; Conde, C. Analysis of Altitude and Ambient Temperature Effects on the Reactivity of Oxidation Catalysts in the Presence of H2. Preprints2024, 2024050045. https://doi.org/10.20944/preprints202405.0045.v1
APA Style
Serrano, J. R., Piqueras, P., Sanchis, E. J., & Conde, C. (2024). Analysis of Altitude and Ambient Temperature Effects on the Reactivity of Oxidation Catalysts in the Presence of H2. Preprints. https://doi.org/10.20944/preprints202405.0045.v1
Chicago/Turabian Style
Serrano, J. R., Enrique José Sanchis and Carla Conde. 2024 "Analysis of Altitude and Ambient Temperature Effects on the Reactivity of Oxidation Catalysts in the Presence of H2" Preprints. https://doi.org/10.20944/preprints202405.0045.v1
Abstract
Worldwide emission standards are now required to cover engine operation under extreme ambient conditions, which affect the raw emissions and the efficiency of the exhaust aftertreatment systems. These regulations also target new combustion technologies for decarbonization, such as neat hydrogen (H2) combustion or dual-fuel strategies, which involve a challenge to the analysis of exhaust aftertreatment systems requirements and performance. This work addresses the impact of high altitude and low ambient temperature conditions on the reactivity of an oxidation catalyst in the presence of H2. A reaction mechanism is proposed to cover the main conversion paths of CO, HC, and H2, including the formation and consumption of high-energy surface reaction intermediates. The mechanism has been implemented into a faster-than-real-time reduced-order model for multi-layer washcoat honeycomb catalytic converters. The model was utilized to investigate the effect of H2 concentration on the reactivity of CO and HC within the catalyst under various operating and ambient conditions. By applying the model and examining the selectivity towards different reaction pathways in the presence H2, insights into surface intermediates and reactivity across different cross-sections of the monolith were obtained. This analysis discusses the underlying causes of reactivity changes promoted by H2 and its relative importance as a function of driving boundary conditions.
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
