Reactions Of Hydroxyl Radicals With Oxygenated Hydrocarbons In The Gas Phase A Laser Photolysis Laser Induced Fluorescence Study PDF Download
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Author | : Cornelie Bänsch |
Publisher | : Logos Verlag Berlin GmbH |
Total Pages | : 196 |
Release | : 2017 |
Genre | : Science |
ISBN | : 3832546324 |
Download Reactions of Hydroxyl Radicals with Oxygenated Hydrocarbons in the Gas Phase: A Laser Photolysis/Laser-Induced Fluorescence Study Book in PDF, ePub and Kindle
Hydroxyl radicals (OH) play a key role in ignition processes and in the atmosphere. Thus, the detailed knowledge of the kinetics of OH reactions is crucial in combustion and atmospheric research. In this work, an experimental approach for time-resolved studies of OH radical reactions at high pressures with pulsed laser photolysis/laser-induced fluorescence was revised and the reactions of dimethyl ether, diethyl ether, and dimethoxymethane with OH radicals were investigated in detail. The results reveal a deeper insight into the reaction processes of ether compounds with OH in general, contributing to a better understanding of the combustion of different biofuels and fuel additives.
Author | : Tunchen Daniel Fang |
Publisher | : |
Total Pages | : 312 |
Release | : 1996 |
Genre | : Chlorofluorocarbons |
ISBN | : |
Download Kinetic Studies of the Reactions of Hydroxyl (OH) Radicals with Hydrogen-containing Chlorofluorocarbons (HCFC) Over an Extended Temperature Range Using a Laser Photolysis/laser-induced Fluorescence Technique Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 1224 |
Release | : 1988 |
Genre | : Power resources |
ISBN | : |
Download Energy Research Abstracts Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 542 |
Release | : 1995 |
Genre | : Aeronautics |
ISBN | : |
Download Scientific and Technical Aerospace Reports Book in PDF, ePub and Kindle
Author | : W. R. Seeker |
Publisher | : CRC Press |
Total Pages | : 480 |
Release | : 1992 |
Genre | : Science |
ISBN | : 9782881245176 |
Download Incineration of Hazardous Waste Book in PDF, ePub and Kindle
Based on papers delivered at the First International Congress on Toxic Combustion By-products: Formation and Control, held in Los Angeles, Calif., August 1989. An overview of emissions, health risks, and existing regulations is followed by coverage of such topics as continuous emissions monitoring and control, processing of solids and liquids, fundamental chemistry, metals emissions, gas transport, and advanced combustion and control systems. Despite the length of time between the conference and publication, no index was prepared. Annotation copyright by Book News, Inc., Portland, OR
Author | : Curt Wittig |
Publisher | : |
Total Pages | : 123 |
Release | : 1982 |
Genre | : |
ISBN | : |
Download Kinetic Studies of Gas Phase Free Radicals Book in PDF, ePub and Kindle
Detailed studies of elementary unimolecular and bimolecular gas phase processes were carried out using the time-resolved techniques of laser photolysis and laser induced fluorescence. Bimolecular reactions of diatomic and triatomic carbon and the ethynyl radical with small polyatomic molecules were investigated, and rate coefficients and energy disposal into product degrees of freedom were determined. The study of unimolecular reactions induced by multiple photon excitation concentrated on simple bond fission reactions. Nascent rovibronic state distributions in the dissociation products of trifluoroacetonitrile were determined as a function of laser fluence and intensity. The rate of the unimolecular reaction of 2-methyl-2-nitrosopropane was measured following dye laser excitation, and found to be faster than the rate deduced from thermal activation experiments. (Author).
Author | : Baagi Thema Mmereki |
Publisher | : Library and Archives Canada = Bibliothèque et Archives Canada |
Total Pages | : 328 |
Release | : 2005 |
Genre | : |
ISBN | : 9780494026014 |
Download Laser Induced Fluorescence Study of the Heterogeneous Interaction of Polycyclic Aromatic Hydrocarbons with Aqueous Surfaces [microform] : Adsorption and Reaction with Gas-phase Ozone Book in PDF, ePub and Kindle
We have also measured the kinetics and products of a reaction between gas-phase ozone and anthracene adsorbed at the air-aqueous interface. The reactions at the "uncoated" air-water interface and at an interface consisting of a monolayer of various organic compounds were studied. In all the cases, the reaction follows a Langmuir-Hinshelwood mechanism, in which ozone first adsorbs to the air-aqueous interface, and then reacts with adsorbed anthracene. For typical atmospheric ozone concentrations, the estimated reactive uptake coefficient ranges from 2 x 10-8 to 3 x 10-7 depending on the nature of the air-aqueous interface. Smaller (C4, C6) carboxylic acids at the interface inhibit the reaction (compared to the "clean" water surface); 1-octanol enhances it. Under some circumstances, oxidation by ozone on aqueous surfaces may be more important in the atmosphere than gas phase oxidation by OH radicals. The fate of atmospheric semi-volatile organic compounds (SOCs) such as polycyclic aromatic hydrocarbons (PAHs) depends, in part, on their distribution between the gas phase and particulate phases, and oxidation reactions. In the daytime troposphere, photochemically produced OH radicals dominate these reactions, whereas chlorine atoms may contribute to the oxidation of certain PAHs in coastal areas. In the dark, oxidation by nitrate radicals (NO3) may also be important, whereas ozone can contribute to the oxidation both during the day and at night. We have developed a laser-induced fluorescence (LIF) method to study adsorption and oxidation of PAHs at the air-aqueous interface. This method allows to directly probe the mechanisms and extent of PAH uptake on aqueous surfaces. The kinetics of the adsorption of anthracene and pyrene onto "pure" water and water coated with an organic film were measured. The surface uptake coefficients of both PAHs are estimated to be on the order of 10-5, and increase by a factor of 2--3 for uptake to the 1-octanol coated water surface. However, the surface uptake of pyrene to a hexanoic-acid-coated aqueous surface does not display this enhancement. Resolved fluorescence spectra of pyrene adsorbed onto 1-octanol-coated surfaces indicate that pyrene is in a less polar environment than when adsorbed at the hexanoic-acid-coated surfaces.
Author | : Joseph John D'Angelo |
Publisher | : |
Total Pages | : 222 |
Release | : 1986 |
Genre | : Fluorescence spectroscopy |
ISBN | : |
Download Development of a Laser Photolysis/laser-induced Fluorescence Technique for Measurement of the Reaction Rate of Hydroxyl Radicals with Selected Organic Compounds Book in PDF, ePub and Kindle
Author | : Jack G Calvert |
Publisher | : OUP USA |
Total Pages | : 1005 |
Release | : 2008-09-15 |
Genre | : Science |
ISBN | : 019536581X |
Download Mechanisms of Atmospheric Oxidation of the Alkanes Book in PDF, ePub and Kindle
An authoritative source of information on the role of alkanes in the chemistry of the atmosphere.
Author | : |
Publisher | : |
Total Pages | : 700 |
Release | : 1964 |
Genre | : Measurement |
ISBN | : |
Download NSRDS-NBS. Book in PDF, ePub and Kindle