Regularities of the Formation of Cool-Flame Oxidation Products of Rich Propane-Oxygen Mixtures in a Two-Section Reactor

Abstract

The effect of the ratio of the reagents on a stabilized cool flame (CF) of rich propane-oxygen mixtures is investigated. It is found that with an increase in the initial concentration of propane in the mixture, its consumption, as well as the concentration of propylene, has a maximum at a ratio of C₃H₈ : O₂ = 1 : 1. In this case, the selectivity of propylene formation reaches a maximum at a ratio of C₃H₈ : O₂ = 4 : 1. It is shown that an increase in the initial propane concentration in the mixture increases the yield of methane, but reduces the yield of propylene, ethylene, hydrogen, CO, CO₂, methanol, formaldehyde and acetaldehyde. At a ratio of C₃H₈ : O₂ = 6 : 1, ethane was also found in the reaction products. The possibility of ethanol formation in the reactions of ethoxyl and hydroxyethyl radicals with acetaldehyde is analyzed using the CBS-QB3 quantum-chemical method.