Aging Effects of Catalytic Converters in Diesel Exhaust Gas Systems
                    and Their Influence on Real Driving NO<sub>x</sub> Emissions for Urban
                    Buses

Moeltner, Lukas; Hohensinner, Michael; Schallhart, Verena

doi:10.4271/02-11-03-0014

Cited by 4 publications

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“…The role of the internal surface area , particularly in hosting catalytically active sites, was previously discussed. Yet, another important aspect is considered in Equation (7). The surface on which convective heat transfer occurs is identical to that used for catalysis.…”

Section: Thermodynamic Analysismentioning

confidence: 99%

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Heat-Up Performance of Catalyst Carriers—A Parameter Study and Thermodynamic Analysis

et al. 2021

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This study investigates geometric parameters of commercially available or recently published models of catalyst substrates for passenger vehicles and provides a numerical evaluation of their influence on heat-up behavior. Parameters considered to have a significant impact on the thermal economy of a monolith are: internal surface area, heat transfer coefficient, and mass of the converter, as well as its heat capacity. During simulation experiments, it could be determined that the primary role is played by the mass of the monolith and its internal surface area, while the heat transfer coefficient only has a secondary role. Furthermore, an optimization loop was implemented, whereby the internal surface area of a commonly used substrate was chosen as a reference. The lengths of the thin wall and high cell density monoliths investigated were adapted consecutively to obtain the reference internal surface area. The results obtained by this optimization process contribute to improving the heat-up performance while simultaneously reducing the valuable installation space required.

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Section: Thermodynamic Analysismentioning

confidence: 99%

“…Catalytically active sites can be copper or iron, which are incorporated in zeolites, or vanadium-based formulations. Operation temperatures for SCR-converters must be commonly between 453 K and 723 K [5,7]. Furthermore, the necessary ammonia generation upstream the converter typically requires a temperature of approximately 473 K cf.…”

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Heat-Up Performance of Catalyst Carriers—A Parameter Study and Thermodynamic Analysis

et al. 2021

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Catalytic Diesel Exhaust Systems: Modern Problems and Technological Solutions for Modernization of the Oxidation Catalyst

Yashnik

2022

Catal. Ind.

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Catalytic systems for neutralization of exhaust gases from diesel engines: modern challenges and technological solutions to improve a diesel oxidation catalyst

Yashnik

2022

Kat.v.prom.

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Diesel vehicles are responsible for the emission of not only soot and NОx to the environment, but also various organic and inorganic toxic compounds. The review provides a detailed discussion of the place of oxidation catalyst in the modern system for purification of exhaust gases from diesel engines, the ways to improve and optimize the oxidation catalysts intended for the neutralization of carbon monoxide and hydrocarbons according to the accepted standards, and the methods for decreasing the content of Pt group metals in the indicated catalytic systems.

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Aging Effects of Catalytic Converters in Diesel Exhaust Gas Systems and Their Influence on Real Driving NO_x Emissions for Urban Buses

Cited by 4 publications

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Heat-Up Performance of Catalyst Carriers—A Parameter Study and Thermodynamic Analysis

Heat-Up Performance of Catalyst Carriers—A Parameter Study and Thermodynamic Analysis

Catalytic Diesel Exhaust Systems: Modern Problems and Technological Solutions for Modernization of the Oxidation Catalyst

Catalytic systems for neutralization of exhaust gases from diesel engines: modern challenges and technological solutions to improve a diesel oxidation catalyst

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Aging Effects of Catalytic Converters in Diesel Exhaust Gas Systems and Their Influence on Real Driving NOx Emissions for Urban Buses

Cited by 4 publications

References 0 publications

Heat-Up Performance of Catalyst Carriers—A Parameter Study and Thermodynamic Analysis

Heat-Up Performance of Catalyst Carriers—A Parameter Study and Thermodynamic Analysis

Catalytic Diesel Exhaust Systems: Modern Problems and Technological Solutions for Modernization of the Oxidation Catalyst

Catalytic systems for neutralization of exhaust gases from diesel engines: modern challenges and technological solutions to improve a diesel oxidation catalyst

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Product

Resources

About

Aging Effects of Catalytic Converters in Diesel Exhaust Gas Systems and Their Influence on Real Driving NO_x Emissions for Urban Buses