Formation Mechanism of Thermal NO_x in Pulverized Coal Combustion Formation Mechanism of Thermal NO_x in Pulverized Coal Combustion

Access this Article

Search this Article

Author(s)

    • OKAZAKI Ken
    • Department of Energy Engineering, Toyohashi University of Technology
    • SUGIYAMA Kazuo
    • Department of Energy Engineering, Toyohashi University of Technology
    • YURI Isao
    • Department of Energy Engineering, Toyohashi University of Technology

Abstract

・rights:日本機械学会・rights:本文データは学協会の許諾に基づきCiNiiから複製したものである・relation:isVersionOf:http://ci.nii.ac.jp/naid/110002493430/

The effects of various basic factors of combustion conditions and coal properties on thermal NO_x formation behaviors in pulverized coal combustion have been experimentally clarified, and a theoretical analysis for the flame structural change around a coal particle has been performed, including full chemical kinetics of prompt NO_x formation. Thermal NO_x concentrations much higher than those predicted by the extended Zeldovich mechanism have been experimentally observed even in the usual pulverized coal combustion conditions. The contribution of thermal NO_x to the total NO_x rapidly increases with the increase of flame temperature and oxygen-fuel stoichiometric ratio, especially for highly volatile coals. Both the large amount of thermal NO_x formation and the effects of various factors on it have been well explained by considering the prompt NO_x formation in the flame zone around each coal particle through HCN and NH formed by the reactions between N_2 in air and hydrocarbons in the evoluted volatile matter.

Journal

  • JSME international journal. Ser. 2, Fluids engineering, heat transfer, power, combustion, thermophysical properties = JSME international journal. Ser. 2, Fluids engineering, heat transfer, power, combustion, thermophysical properties

    JSME international journal. Ser. 2, Fluids engineering, heat transfer, power, combustion, thermophysical properties = JSME international journal. Ser. 2, Fluids engineering, heat transfer, power, combustion, thermophysical properties 34(4), 533-539, 1991-11-15

    The Japan Society of Mechanical Engineers

Codes

  • NII Article ID (NAID)
    110002493430
  • NII NACSIS-CAT ID (NCID)
    AA10680596
  • Text Lang
    ENG
  • Article Type
    journal article
  • ISSN
    0914-8817
  • Data Source
    NII-ELS  IR 
Page Top