Photochemistry of the Gaseous Hydrogen Peroxide-Carbon Monoxide System:Rate Constants for Hydroxyl Radical Reactions by Competitive Kinetics.

摘要

The reaction between hydrogen peroxide and carbon monxide initiated by absorption of 254nm light at 298K in a static system was studied. Hydroxyl radicals were formed in the primary process and reacted with carbon monoxide to yield carbon dioxide and hydrogen atoms. Hydrogen atoms reacted with hydrogen peroxide either to yield H2O and OH or to yield H2and HO2. For these processes the rate constant ratio was found. With sufficient added oxygen hydrogen atoms reacted only with oxygen to yield HO2and it was possible to obtain a rate constant for the reaction of OH with H2O2. With both oxygen and isobutane added,it was possible to obtain a rate constant for the reaction of OH with (CH3)3CH. Preliminary results for the reaction with propionaldehyde were also obtained. (Modified author abstract)