Nitric Oxide Formation and Carbon Monoxide Burnout in a Compact Steam Generator

  • G. C. Williams
  • A. F. Sarofim
  • N. Lambert


In a proposed design of a compact-boiler for a steam-engine, a premixed, vaporized-fuel/air mixture is fed through a perforated feed-plate into the combustion chamber and the products of combustion are withdrawn through a compact, low-pressure-drop heat exchanger. This paper describes measurements of carbon monoxide (CO) and nitric oxide (NO) emissions from a prototype combustion chamber in which the vaporized fuel is simulated by propane. The fuel/air mixture is fed at rates up to 4625 cu.ft./hr. through 6500, 0.033 in. I.D. holes corresponding to 20% open area in a 6 in. O.D. plate. The combustion products are withdrawn through a flat, coiled heat exchanger positioned 3 in. downstream from the burner plate. The maximum average volumetric heat release rate is about 6x106 Btu/ft3hr. Samples withdrawn through a water-cooled probe from different positions above the plate are analyzed for hydrocarbons (HC), CO and NO. The measured emission rates are compared with values calculated assuming that the overall reaction rates are limited by the reaction of CO with OH and N2 with O, and that the free radical concentrations are determined by the combination of the reactions
$$ {\rm{OH }} + {\rm{ }}{{\rm{H}}_{\rm{2}}} = {\rm{ }}{{\rm{H}}_{\rm{2}}}{\rm{O }} + {\rm{ H}},{\rm{ H }} + {\rm{ }}{{\rm{O}}_{\rm{2}}} = {\rm{ OH }} + {\rm{ O}},{\rm{ and O }} + {\rm{ }}{{\rm{H}}_{\rm{2}}} = {\rm{ OH }} + {\rm{ H}} $$

The results are used to define combustion chamber volume for different desired fuel rates and emission rates.


Nitric Oxide Heat Exchanger Combustion Chamber Energy Release Rate Steam Generator 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Science+Business Media New York 1972

Authors and Affiliations

  • G. C. Williams
    • 1
  • A. F. Sarofim
    • 1
  • N. Lambert
    • 1
  1. 1.Massachusetts Institute of TechnologyCambridgeUSA

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