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Technical Paper

Effect of Dithering on post-catalyst exhaust gas composition and on short time regeneration of deactivated PdO/Al2O3 catalysts under real engine conditions

2024-06-12
2024-37-0002
Fossil fuels such as natural gas used in engines still play the most important role worldwide despite such measures as the German energy transition which however is also exacerbating climate change as a result of carbon dioxide emissions. One way of reducing carbon dioxide emissions is the choice of energy sources and with it a more favourable chemical composition. Natural gas, for instance, which consist mainly of methane, has the highest hydrogen to carbon ratio of all hydrocarbons, which means that carbon dioxide emissions can be reduced by up to 35% when replacing diesel with natural gas. Although natural gas engines show an overall low CO2 and pollutant emissions level, methane slip due to incomplete combustion occurs, causing methane emissions with a more than 20 higher global warming potential than CO2.
Technical Paper

Model-Based Algorithm for Water Management Diagnosis and Control for PEMFC Systems for Motive Applications

2024-06-12
2024-37-0004
Water management in PEMFC power generation systems is a key point to guarantee optimal performances and durability. It is known that a poor water management has a direct impact on PEMFC voltage, both in drying and flooding conditions: furthermore, water management entails phenomena from micro-scale, i.e., formation and water transport within membrane, to meso-scale, i.e., water capillary transport inside the GDL, up to the macro-scale, i.e., water droplet formation and removal from the GFC. Water transport mechanisms through the membrane are well known in literature, but typically a high computational burden is requested for their proper simulation. To deal with this issue, the authors have developed an analytical model for the water membrane content simulation as function of stack temperature and current density, for fast on-board monitoring and control purposes, with good fit with literature data.

2024-04-26

2024-04-26
Event

Attend - Innovations in Mobility: Automotive Digital Summit

2024-04-26
Attend the 2021 Innovations in Mobility Automotive Digital Summit — brought to you by SAE International® — is designed to bring together mobility organizations from across the industry in a neutral forum to accelerate their business and build future partnerships.

Leadership - Powertrains, Fuels & Lubricants Meeting

2024-04-26
PF&L is priority event for mobility professionals that specialize in powertrain, fuels, lubricants technology, including OEM and Tier 1 component suppliers Light medium and heavy-duty vehicle system and product design engineers

2024-04-26
Event

2024-04-26
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