Inhibition of hydrogen-oxygen-nitrogen diffusion flames by potassium superoxide
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Authors
Mitson, Scott C.
Issue Date
1990
Type
Thesis
Language
en_US
Keywords
Hydrogen , Carbon Monoxide , Rocket Plume Gases , Potassium Salts , Inhibition Effects , Inhibition Of Hydrogen-oxygen-nitrogent Diffusion Flames , Potassium Superoxide , Mackay Theses and Dissertations Grant Collection
Alternative Title
Abstract
The afterburning of hydrogen and carbon monoxide in rocket plume gases Is Inhibited by the addition of potassium salts to the rocket propellant formulation. The mechanism of the inhibition is not completely understood, but it is believed to Involve chain breaking of H and OH' reactions by K0, KOH, and KO2. The present study is directed toward clarifying the reactions involved. Inhibition effects are reported of K0 and Ko2 vapor on the combustion of preheated nitrogen-diluted hydrogen-oxygen opposed-jet diffusion flames for various lean to rich mixtures with overall stoichiometric ratios(+) ranging from 0 .72 to 1.21. These effects are Interpreted from the spectral emission measured from Incremental scans of a flat flame in the 3800 - 3000 cm' range for water and OH bands. It is concluded that K0 vapors Inhibit the combustion of hydrogen over the range studied of 0 .1 to 1692 molar ppm for lean to rich flames with t's of 0.98 to 1.21. KO2 inhibits at concentrations equivalent to its equilibrium vapor pressure at 160° to 320°C for ifs of 0 .72 to 1.21.
Description
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Citation
Publisher
University of Nevada, Reno
License
In Copyright(All Rights Reserved)