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2 edition of Effects of photochemical kinetic mechanisms on oxidant model predictions found in the catalog.

Effects of photochemical kinetic mechanisms on oxidant model predictions

J. P Killus

Effects of photochemical kinetic mechanisms on oxidant model predictions

by J. P Killus

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  • 16 Currently reading

Published by U.S. Environmental Protection Agency, Environmental Sciences Research Laboratory, Center for Environmental Research Information [distributor] in Research Triangle Park, NC, Cincinnati, OH .
Written in English

    Subjects:
  • Air quality management -- United States

  • Edition Notes

    StatementJ.P. Killus and G.Z. Whitten
    ContributionsWhitten, G. Z, Environmental Sciences Research Laboratory
    The Physical Object
    Pagination5 p. :
    ID Numbers
    Open LibraryOL14891424M

    A photochemical kinetics mechanism for urban and regional scale computer modeling. Journal of Geophysical Research , 94 (D10), DOI: /JDiD10pCited by:   A reduced chemical kinetic model has been developed for the prediction of major oxidation behavior of primary reference fuels (PRF's) in a motored engine, including ignition delay, preignition heat release, fuel consumption, CO formation and production of other species classes. This model consists oCited by:

    William P. L. Carter. Effects of Kinetic Mechanisms and Hydrocarbon Composition on Oxidant-Precursor Relations Predicted by the EKMA Isopleth Technique Atmos. Environ., 16, () Documentation of a Gas-Phase Photochemical Mechanism for Use in Airshed Modeling Report, California Air Resources Board Contract No. A A model is developed to account for the chemical features of photochemical smog observed in laboratory and atmospheric studies. A detailed mechanism consisting of some 60 reactions is proposed for a prototype smog system, the photooxidation in air of propylene in the presence of oxides of nitrogen at low concentrations.

    @article{osti_, title = {Effects of photochemical oxidants on plants}, author = {Guderian, R and Tingey, D T and Rabe, R}, abstractNote = {Photochemical oxidants are found in 'photochemical smog' which is a complex mixture of primary and secondary air pollutants. The photochemical oxidants are secondary air pollutants formed by the action of sunlight on nitrogen oxides and reactive.   (). The Effects of Photochemical Oxidants on Materials. Journal of the Air Pollution Control Association: Vol. 17, No. 6, pp. Cited by:


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Effects of photochemical kinetic mechanisms on oxidant model predictions by J. P Killus Download PDF EPUB FB2

Procedure Three models were selected to test the effects of kinetic mechanism substitution on control strategy assessment: OZIPM/ EKMA, which accepts the kinetic mecha- nism as an input; the Urban Airshed Model (UAM), in which the kinetic mecha- nism is a module that must be receded when the substitution is made; and the Airshed Compatible Trajectory Model (ACTM), which uses the same kinetic module.

Get this from a library. Effects of photochemical kinetic mechanisms on oxidant model predictions. [J P Killus; G Z Whitten; Environmental Sciences Research Laboratory.].

Sources of discrepancies between predictions of the kinetic mechanisms Since the development of mechanism D, knowledge has increased concerning the rates and mechanisms of many reactions occurring in hydrocarbon-NO -air irradiations; and this more recent information has been incorporated into mechanism by: Predictions of oxidant-precursor relationships and of hydrocarbon control requirements for ozone reductions made using the "empirical kinetic modeling approach" (EKMA) were found to depend significantly on the kinetic mechanism employed and on the aldehyde content assumed in the hydrocarbon mixture.

Comparison of Chemical Mechanisms in Photochemical Models. , DOI: /S(08)X. A.M. Hough, C. Reeves. Photochemical oxidant formation and the effects of vehicle exhaust emission controls in the U.K. the results from 20 different chemical by: Effect of initial oxidant concentration on k obs. Reaction solution at pHand were unadjusted whereas those at and were adjusted with N HCl and 5 mM phosphate buffer Cited by: Abstract.

The EKMA is a Lagrangian photochemical air quality simulation model that calculates ozone from its precursors: nonmethane hydrocarbons (NMHC) and nitrogen oxides (NO x).This study evaluated the performance of the EKMA when it is used to estimate the maximum ozone concentration that can occur in an urban area and its by: 3.

Photochemical oxidation and changes in molecular composition of organic aerosol in the regional context. Comparisons of measurements with model predictions in Los Angeles suggest that oleic acid is oxidized in the The paper concludes with a discussion of the potential effects of photochemical aging on source apportionment analysis.

Cited by: is a platform for academics to share research papers. The three most important reactions in terms of their effect on O 3 predictions were the photolysis of NO 2, HCHO, and O 3, suggesting that uncertainties associated with absorption cross-sections, quantum yields and actinic flux could have a substantial impact on model by: The EFFECT of TEMPERATURE on PHOTOCHEMICAL OXIDANT PRODUCTION in a Bench Scale Reaction System** FORREST C.

ALLEY,** M.S., P.E., Research Associate, and LYMAN A. RIPPERTON, Ph.D., Assistant Professor, Department of Sanitary Engineering, School of Public Health, University of North Carolina In the 10 or so years since Haagen-Smit1 proposed the.

The mechanism, called the Carbon Bond Mechanism IV (CBM‐IV), was derived by condensing a detailed mechanism that included the most recent kinetic, mechanistic, and photolytic information.

The CBM‐IV contains extensive improvements to earlier carbon bond mechanisms in the chemical representations of aromatics, biogenic hydrocarbons, peroxyacetyl nitrates, and formaldehyde.

The Effects of Photochemical Oxidants on Materials The excessive cracking of rubber products was one of the earliest indicators of the presence of atmospheric photochemical oxidants. It has been demonstrated that this excessive cracking of rubber is caused by atmospheric ozone formed in the photochemical smog formation process.

Kinetic Solvent Effects on Hydrogen-Atom Abstractions: Reliable, Quantitative Predictions via a Single Empirical Equation1. Journal of the American Chemical Society(3), Cited by: This study concludes that there is a wide variation of mechanisms with respect to the predictions of oxidants and nitrogen compounds; however, less variation is noticed in predictions of O3.

For any air pollution control strategies and photochemical modeling studies in the current region or in any other arid regions, the CB05 mechanism is : Mohammed Mujtaba Shareef, Tahir Husain, Badr Alharbi.

The carbon-bond mechanism is a set of generalized reactions that can be used to model photochemical oxidant formation. The theoretical framework of carbon-bond mechanism is outlined. A modeling study was undertaken to assess the effect of organic reactivity on photochemical oxidant formation.

A six-component hydrocarbon model was developed and tested against data collected in a smog chamber study of irradiated auto exhaust and oxides of nitrogen (NO x) model was then adjusted to conditions that more closely approximated those of the urban by: 5.

Factors Determining Outcome of a Photochemical Reaction The wide variety of molecular mechanisms of photochemical reactions makes a general discussion of such factors very difficult.

The chemical nature of the reactant(s) is definitely among the most important factors determining chemical reactivity initiated by light. 2 with the chemical model of the reacting species. A hydrocarbon-specific photochemical ozone model is developed, based upon a minimum set of chemical : Ebrahim Moshiri.

the MOZART model, and the heterogeneous reactions on mineral dust will not be discussed in the present study. Furthermore, the The corresponding reaction coefficients are listed in Table 1. The model does not account for the impact of aerosol radiative effects reactions (R1)-(R4) do not represent single reactions, but a on the by:.

The revised kinetic model was used to simulate methanol oxidization process in order to study the effects of key substances on low-temperature oxidation process.Intramolecular kinetic isotope effects (KIEs) were determined for cytochrome Pcatalyzed hydroxylation reactions of methyl-dideuterated transphenylcyclopropylmethane-d2 (1-d2), which gives two products from oxidation of the methyl group, transphenylcyclopropylmethanol (2) and 1-phenylbuten-1ol (3).

In oxidations of each enantiomer of 1-d2 with three P enzymes (CYP2B1, CYPΔ2E1 Cited by: Model Proton-Coupled Electron Transfer Reactions in Solution: Predictions of Rates, Mechanisms, and Kinetic Isotope Effects September The Journal of Physical Chemistry A (41).