A parametric study of NO2 emission from turbulent H-2 and CH4 jet diffusion flames

    Authors

    R. H. Chen

    Comments

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    Abbreviated Journal Title

    Combust. Flame

    Keywords

    HOT BURNED GAS; MIXING REGION; COOL AIR; Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary; Engineering, Chemical

    Abstract

    Nitrogen dioxide (NO2) emission levels of fuel jets were experimentally studied for H-2, H-2/He mixtures, a H-2/He/CH4 mixture, and CH4. The study was undertaken to understand the dependence of NO2 emission in turbulent diffusion flames on parameters other than the widely known effects of rapid mixing. These parameters are fuel types (CH4 vs H-2), the initial NO level, and the flame temperature. The fuel mixtures were chosen such that these factors could be investigated independently. In all the flames studied, NO2/NOx increases with decreasing NO concentration in the flame and with decreasing adiabatic flame temperature. The CH4 fuel demonstrates a qualitatively different influence on the NO2/NOx ratio than H-2. Its effects are most pronounced when the flame blowout limit is approached. Adding a small amount of CH4 to the H-2 flames also qualitatively affected the NO2/NOx ratio. (C) 1998 by The Combustion Institute.

    Journal Title

    Combustion and Flame

    Volume

    112

    Issue/Number

    1-2

    Publication Date

    1-1-1998

    Document Type

    Article

    Language

    English

    First Page

    188

    Last Page

    198

    WOS Identifier

    WOS:A1998YH96200015

    ISSN

    0010-2180

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