نتایج جستجو برای: soot oxidation

تعداد نتایج: 120227  

2010
C. WEY E. A. POWELL J. I. JAGODA

The effect of temperature on soot formation in a laminar propane diffusion flame was investigated. The temperature of the flame on a Parker Wolf hard burner was varied by adjusting the inert nitrogen content in the oxidizer flow. Local soot aggregate properties, such as aggregate diameters and their number densities as well as soot volume fractions were determined using simultaneous laser light...

Journal: :Catalysis Today 2021

This study investigates the catalytic activity for soot combustion of Ag nanoparticles dispersed on various supports showing different redox properties. Temperature programmed oxidation and isotopic exchange experiments were performed to assess impact soot/catalyst contact, oxygen partial pressure ageing toward activity. Three contact modes have been used clearly highlight performances: loose, ...

2008
Mark L. Nagurka

An advanced feedback control strategy for a vapor-phase axial deposition (VAD) is investigated in this paper. VAD is a widely used process in the creation of high purity glass for optical fiber. In previous work a soot tip surface temperature controller was developed for the VAD process to reduce the effects of core soot temperature variation on deposition geometry, leading to a more stable pro...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2009
Ryan C Moffet Kimberly A Prather

Our ability to predict how global temperatures will change in the future is currently limited by the large uncertainties associated with aerosols. Soot aerosols represent a major research focus as they influence climate by absorbing incoming solar radiation resulting in a highly uncertain warming effect. The uncertainty stems from the fact that the actual amount soot warms our atmosphere strong...

2008
G. Blanquart H. Pitsch

This article presents an analysis of soot formation in kerosene and fuel surrogates. This analysis is based on a detailed chemical mechanism for the combustion of single component fuels such as n-heptane, isooctane, benzene, and toluene. The chemical mechanism describes the formation of polycyclic aromatic hydrocarbons (PAH) up to cyclo[cd]pyrene and is shown to reproduce the formation of soot ...

2011
Patrick Lam Eric Bodden Ondřej Lhoták Laurie Hendren

Soot is a successful framework for experimenting with compiler and software engineering techniques for Java programs. Researchers from around the world have implemented a wide range of research tools which build on Soot, and Soot has been widely used by students for both courses and thesis research. In this paper, we describe relevant features of Soot, summarize its development process, and dis...

Journal: :The journal of physical chemistry. A 2009
Alexei F Khalizov Huaxin Xue Lin Wang Jun Zheng Renyi Zhang

Light absorption by carbon soot increases when the particles are internally mixed with nonabsorbing materials, leading to increased radiative forcing, but the magnitude of this enhancement is a subject of great uncertainty. We have performed laboratory experiments of the optical properties of fresh and internally mixed carbon soot aerosols with a known particle size, morphology, and the mixing ...

2015
D. Koch Y. Balkanski S. E. Bauer N. Yan R. C. Easter S. Ferrachat S. J. Ghan C. Hoose T. Iversen A. Kirkevåg J. E. Kristjansson X. Liu U. Lohmann S. Menon J. Quaas M. Schulz Ø. Seland T. Takemura

We use global models to explore the microphysical effects of carbonaceous aerosols on liquid clouds. Although absorption of solar radiation by soot warms the atmosphere, soot may cause climate cooling due to its contribution to cloud condensation nuclei (CCN) and therefore cloud brightness. Six global models conducted three soot experiments; four of the models had detailed aerosol microphysical...

2012
Sanaz Ghasemi Ömer L. Gülder

Laser-Induced Incandescence of Soot at High Pressures Sanaz Ghasemi Master of Applied Science Graduate Department of Aerospace Science and Engineering University of Toronto 2012 Measurements of soot emission properties are of interest in both fundamental research and combustion-based industries. Laser-induced incandescence of soot particles is a novel technique that allows unobtrusive measureme...

Journal: :Proceedings of the Combustion Institute 2021

Soot particle dynamics, including size distributions (PSDs) and related statistics, are of increasing practical significance due to evolving regulatory demands. The combination a mass number density preserving sectional model with transported joint probability function (JPDF) method ensures full coupling the scalar space, e.g. soot gas phase reactions radiative heat losses, within that can repr...

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