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Showing 1 to 20 of 236 for “"Soot"”.
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Iron Reduction in Soot
… understood. Here, we investigate the role of soot on Iron reduction from Fe(III) to Fe(II), under various conditions including those encountered in the tailpipe of a vehicle. Aqueous leaching experiments of soot-hematite mixtures were carried out while analyzing for Fe(II) …
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Soot burnout in flames
Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1981.
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Determination of the Oxidative Capacity of Soot Toward GSH and Characterization of Soot Physicochemical Properties
<p>Fine atmospheric particulate matter (PM<sub>2.5</sub>) emitted during the combustion of fossil and biomass fuels is known to adversely affect human health. While the underlying mechanisms are thought to be driven by the generation of reactive oxygen species (ROS), specific particle …
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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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Soot formation in laminar diffusion flames
Thesis: B.S., Massachusetts Institute of Technology, Department of Chemical Engineering, 1958
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Chemical and physical mechanisms of soot formation
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1989.
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Soot formation in vitiated-air diffusion flames
Soot volume fractions have been measured using optical techniques in dual mode diffusion flames. A dual mode flame is defined as a diffusion fuel jet that burns in the wake of a premixed flame. The premixed flame combustion products simulate a vitiated-air environment: the air is preheated, rich in …
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Flamelet modelling of soot formation in diffusion flames
… unsteady flamelet models have been applied to soot formation in laminar and turbulent diffusion flames. The aim was to study how different model parameters affect soot formation in diffusion flames. It was shown that certain assumptions are more crucial in laminar diffusion flames than in …
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Modelling and simulation of soot generation and transport
Soot released from fires not only causes danger to lives and property damage, but also effects fire spread by altering the radiation characteristics of fire effluents. In many situations, it is the soot concentration that controls the fire development. Therefore, soot modelling is of great …
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Laser diagnostics of soot in hydrocarbon diffusion flames
Driven by the demand for soot-free combustion, laser-based diagnostic techniques on soot have been developing since the late 1980s. One of these techniques is line-of- sight extinction, which is a fast, low-cost, and quantitative method to investigate the soot volume fraction in flames. However, …
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The effects of metal additives on soot formation
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1990.
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Soot surface growth mechanisms in stationary combustion systems
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1997.
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The Effect of Ozone on Diesel Soot Precursors
… Tech to study the effect of ozone on diesel soot precursors. This thesis is the first stage of the numerical part of the project, and contains a study of the effect of the different ozone levels on diesel soot precursors. This numerical study is executed via the use of two computer programs, …
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Fluidization and soot filtration in a rotating fluidized bed
… (RFB) has been investigated for the removal of soot from diesel engine exhaust. This requires necessitating an understanding of the nature of fluidization, particle mixing and filtration in the RFB. In an RFB, particles are subject to a centrifugal force which can be much larger than the force …
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Laser-induced incandescence for soot diagnostics at high pressure
… particles, as emitted by traffic in the form of soot, cause a significant health risk, as nano-sized particles can penetrate deeply into the lungs and are considered important for causing asthma, fibrosis and the development of tumors [1,2]. Over the past 20 years, LII has been developed and …
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Predicting Soot Emissions with Advanced Turbulent Reacting Flow Modelling
Soot is carbonaceous particulate matter formed due to the incomplete combustion of hydrocarbon fuels. The prediction of soot emissions is crucial if next-generation combustion devices are to mitigate the deleterious effects of particulate matter on human health and the environment. Theories for the …
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Nanocomposite catalysts for soot combustion and propane steam reforming
… for application in the emission control of soot particulates generated by diesel engines. In this work, CuO was coated onto nanocrystalline supports, such as alumina, ceria, zirconia and titania. The best activity and catalyst reducibility were achieved by CuO supported on CeO2, a material …
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Light scattering; a technique for studying soot in flames
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1962.
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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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