Date of Award

1984

Document Type

Dissertation

Degree Name

Doctor of Philosophy (PhD)

Department

Chemical Engineering

Abstract

A study combining ignition delay measurements and quenched product distributions from shock-tube experiments with chlorinated hydrocarbons has been conducted to develop a better understanding of the combustion characteristics of these compounds which are candidates for incineration. The ignition delay times of selected C(,1), C(,2) and C(,6) chlorinated hydrocarbon- stoichiometric oxygen mixtures have been measured behind reflected shock waves at a pressure of 1.8 atm over the temperature range 1200-1700K. Studies were also conducted with mixtures of chlorinated and nonchlorinated hydrocarbons to examine the effect of chlorine atom/hydrogen atom ratio on ignition delay behavior. The results indicate that contrary to conventional wisdom the chlorinated hydrocarbons are not more difficult to ignite than the analogous hydrocarbon. Quenched product distributions in shock-tube studies of the pyrolysis and oxidation of methane, methyl chloride and dichloromethane were determined at a total density of 7.5 (+OR-) 0.5 x 10('-7) mol/cc over the temperature range 1200-2700 K. The product distributions indicate that there is a much larger propensity to produce soot and priority organic pollutants as the chlorine atom/hydrogen atom ratio of the reactants increased. The first chemical kinetic mechanisms including detailed chemistry for the C(,1) and C(,2) chlorinated hydrocarbons had been developed. The mechanism contains 432 reactions and 59 chemical species. This model was used to identify the importance of C(,2) chlorinated hydrocarbons during the pre-ignition oxidation of methyl chloride.

Pages

156

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