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Showing 1 to 9 of 9 for “"Three-way catalysts"”.
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Microkinetics modeling of automotive three-way catalysts
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2003.
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Biorecovery of platinum group metals from three-way catalysts
Los metales del grupo del platino (PGMs), que incluyen platino (Pt), paladio (Pd) y rodio (Rh), son componentes indispensables de los catalizadores automotrices de tres vías (TWC), los cuales desempeñan un papel crucial en la mitigación de emisiones vehiculares al convertir gases nocivos como CO, …
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CO and Hydrocarbon Oxidation on PD/Ceria-Zirconia/Alumina Three-Way Catalysts
… impact of automotive emissions. Over the years, three-way catalysts (TWCs) have been developed and widely implemented to control and reduce tailpipe emissions of carbon monoxide (CO), hydrocarbons (HCs), and nitrogen oxides (NOx) by converting these harmful and undesirable species to CO2, H2O, …
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Role of Storage Material in NOX Storage and Reduction (NSR) and Three-Way Catalysts (TWC) During Cycling Operation
… at a high temperature and cycle frequency. Three-way catalysts (TWC) are widely applied in stoichiometric combustion vehicles. The invention of novel oxygen storage materials (OSM), such as spinels, requires more advanced understanding of their promotion impacts. NOx reduction under net lean …
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Evaluation of advanced air-fuel ratio control strategies and their effects on three-way catalysts in a stoichiometric, spark ignited, natural gas engine
… expected to decrease further in the future. A three-way catalyst (TWC) is a cost-effective exhaust after treatment system can be used to reduce pollutant emissions through a series of reactions that are catalyzed by special conditions within the catalyst. Using TWCs, emissions can be …
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An exploration of automotive platinum demand and its impacts on the platinum market
… platinum demand, due to the use of platinum in three way catalysts. Platinum is one of the materials utilized to catalyze reactions that prevent vehicle emissions from entering the atmosphere, which can have a severe impact on air quality. Two factors will likely contribute to the future growth …
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Development of a spatially-resolved technique for the measurement of effective diffusions and Its application to the reaction modelling of deactivated washcoated catalytic monoliths
… technologies is essential. Optimisation of the three-way catalysts (TWCs) converters is a challenge due to the spatially-distributed and transient nature of the operation of vehicles. The conventional method of investigating catalysts properties by analysis of the chemical species at the reactor …
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Low-dimensional Models for Real-time Simulation of Internal Combustion Engines and Catalytic After-treatment Systems
… work, we propose a low-dimensional model of the three-way catalytic converter (TWC) for control and diagnostics. Traditionally, the TWC is controlled via an inner-loop and outer-loop strategy using a downstream and upstream oxygen sensor. With this control structure, we rely on the oxygen sensor …
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Continuous synthesis of metallic and oxidic palladium nanoparticles with tunable sizes for catalytic applications
… reduce emissions in vehicles. More specifically, three-way catalysts are the most widely used catalysts for gasoline engines and use platinum group metals, such as palladium, as the active catalyst materials and oxides such as cerium dioxide as support. Palladium and palladium-based cerium dioxide …