Title page for ETD etd-06162009-063102


Type of Document Master's Thesis
Author Hunderup, James W
URN etd-06162009-063102
Title An experimental investigation of the conversion of NO to NO2 in a simulated gas turbine environment
Degree Master of Science
Department Mechanical Engineering
Advisory Committee
Advisor Name Title
Roby, Richard J. Committee Chair
Roe, Larry A. Committee Member
Vandsburger, Uri Committee Member
Keywords
  • Chemical reactions.
Date of Defense 1993-10-08
Availability restricted
Abstract
Unexpectedly high concentrations of N02 have been noted in stack emissions from industrial gas turbines. N02 formation appears to occur through the so called "H02 mechanism II in which NO combines with H02 to produce N02 and OH. In this study, the formation of N02 was investigated through computer modeling and experimental testing.

Computer modeling utilized the CHEMKIN chemical kinetics program and a subset of a previously published C-H-O-N system mechanism. Experimental work was conducted using a high pressure flow reactor designed and built in the course of the study. The effects of pressure, temperature, and the presence of a N02 promoting hydrocarbon, methane, were investigated. It was discovered that as pressure increased from 1 atm. to 8.5 atm., the rate and amount of NO converted to N02 also increased. There also appeared to be a temperature "window" between approximately 800 and 1000 K in which NO to N02 conversion readily occurred. The presence of methane was seen to enhance NO conversion to N02, and a ratio of [CH4]/[NO] was found to be a useful parameter in predicting N02 formation. Significant NO conversion to N02 was noted for [CH4]/[NO] > 1 at the hydrocarbon injection point. Experimental results validated those trends obtained from modeling with a modified C-H-O-N mechanism.

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