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Showing 1 to 12 of 12 for “"Soot oxidation"”.
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Design and development of a microwave-enhanced diesel soot oxidation system
… regeneration parameters: initial collected soot mass, preheating time, combustion airflow, and combustion air temperature. (Abstract shortened by UMI.).
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In-Cylinder Soot Oxidation in an Optically Accessible Automotive Diesel Engine
The problematic soot emission of diesel engines is the net result of the competing in-cylinder formation and oxidation processes. Previous studies primarily focused on the soot formation, whereas the oxidation of soot particles remains an unexplored and least studied topic. To bridge this gap, this …
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Untersuchung der Rußoxidation unter dieselmotorischen Randbedingungen
Soot emission of diesel engines is the result of soot formation and of soot oxidation. Experimental investigations showed that most of the soot is oxidized during combustion. Therefore soot oxidation has major influence on the tail pipe emission. In this thesis a simulation model has been developed …
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Low-Temperature Combustion in a Small-Bore High-Speed Direct Injection Optically Accessible Diesel Engine
… for bio-diesel fuel blends showing a lower soot formation rate. The flame luminosity decreased faster for bio-diesel fuel indicating a faster soot oxidation rate. The increased NOx emissions of bio-diesel fuels were greatly reduced by employing the low temperature combustion mode. Results …
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Laseroptische Untersuchungen des Verbrennungsprozesses in einem PKW-Dieselmotor
… Obviously, during pre-injection combustion soot is formed. Some of this soot remains up to the beginning of the main injection event. This is confirmed by flame luminescence imaging of the auto-ignition of the main injection with the standard 6 hole nozzle. Soot formation and soot oxidation …
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The effect of lubricant derived ash on the catalytic activity of diesel particulate filters
… Diesel PM is comprised primarily by black carbon soot. Once trapped in the filter, the soot can be oxidized into CO2 and pass out of the exhaust system during what is referred to as regeneration. Metallic lubricant additive derived compounds, which make up a small fraction of PM, cannot be …
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In Situ Electron Microscopy for Characterization and Development of Clean Energy Nanomaterials
… in the form of carbon nanoparticulates (i.e. soot). To mitigate the production of these pollutants, a more thorough understanding of how these products are formed is required. Apart from the harmful effects, flame formed carbon nanomaterials have crucial uses in material science - ranging from …
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Characterization, Speciation, and Source Apportionment of Particles inside and from the Exhaust of Public Transit Buses Fueled With Alternative Fuels
… new method for determining kinetic parameters of soot oxidation is applied for exhaust particles collected from public transit buses. The results indicate that the use of BD in public transit buses will result in lower particle formation from the engine. Particle morphology is clearly spherical …
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Ultra-fine soot investigation in flames
In-flame soot particle size and concentration analysis techniques were developed for high concentrations of ultra-fine soot particles (particle diameters<< 1000 nm) using a Scanning Mobility Particle Sizer (SMPS). The SMPS particle size results were compared to results obtained by thermo phoretic …
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Untersuchungen zur katalytischen Oxidation von submikronen Kohlenstoffpartikeln aus motorischen Abgasen
… particles and particles on the micrometer scale (soot) simultaneously. In general, the number of nanoparticles per cubic metre exhaust predominate the number of particles in the micrometer range clearly. For example, modern diesel engines emit a few 10 000 soot particles per cm3 exhaust of size …
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Understanding the development of a reacting fuel jet inside an automotive-size diesel engine using optical and laser-based diagnostics
… (PLII) imaging has been performed to clarify soot processes within the wall-interacting jet. Once again, a single-hole nozzle was used to isolate the jet-wall interaction from jet-jet interactions and to apply long injection duration corresponding to high-load engine operating conditions in …
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Experimental Investigation of Large Scale Aerodynamics on Soot Emissions in Swirling Flows
Soot are microscopic airborne particles that impact human health and global climate, and are released into the atmosphere as a result of incomplete combustion. Reducing soot formation from burners improves both their efficiency and emissions standards. Modern burners utilize the Rich-Quench-Lean …