Gas‐phase oxidation of 1,4‐dioxane

Abstract

An experimental investigation in a conventional static apparatus of the oxidation of equimolecular mixtures 1,l-dioxane-OZ has shown that 1,4-dioxane reacts with oxygen more readily than most hydrocarbons. Cool flames and ignitions were observed above 200°C in a pressure range up to 300 torr.The products of the slow reaction and cool flame were analyzed by gas chromatography and GC-MS; the slow reaction gives only CO, Cot, HzCO, Hz, CzH4, and HzO.A radical chain mechanism is suggested and discussed by using a n evaluation of the rate constants of the possible elementary steps by the methods of thermochemical kinetics.

Complete oxidation of 1,4-dioxane over zeolite-13X-supported Fe catalysts in the presence of air

“…The decrease in the percentage conversion and COx yields is attributed to the formation of coke on the catalyst surface at higher reaction temperatures, thereby blocking of some of the active sites that are responsible for the catalytic activity. From these results, it is concluded that the iron oxide catalyst sup- ported on zeolite 13X is sufficiently stable even after continuous usage for 50 h. Compared with other catalysts used for the oxidation of dioxane [32,47,49], complete oxidation of dioxane over the Fe/13X catalyst is more efficient in terms of activity, stability of the catalyst, and selectivity for the formation of the complete oxidation products.…”

“…Battin et al [32] also investigated gas-phase oxidation of equimolecular mixtures of 1,4-dioxane and O2 in a conventional static apparatus in the temperature range 200-400 °C at low pressure (10-300 Torr). They reported formation of CO, CO2, HCHO, H2, C2H4, and H2O as the main thermal oxidation products, small amounts of acetaldehyde and acrolein, and trace amounts of CHO-CHO, CH3O-CH2-CHO, and CH3-CH2O-CH2-CHO as the gas-phase oxidation products.…”

Chemical kinetics of cyclic ethers in combustion

“…The studies for 1,4-dioxane focused mainly on product formation. Battin et al [678,679] investigated the pyrolysis and oxidation of this CE in a static reactor. They detected CO, H2, C2H4, and CH2O as the main pyrolysis products.…”

Combustion Intermediates in Fuel-Rich 1,4-Dioxane Flame Studied by Tunable Synchrotron Vacuum Ultraviolet Photoionization

“…Battin et al reported an experimental investigation of oxidation of equimolecular mixtures 1,4dioxane/O 2 in the early 1990s. 23 The investigation showed that 1,4-dioxane reacted with oxygen more readily than most hydrocarbons, and a radical chain mechanism was suggested and discussed. Besides, few investigations have been reported on oxidation and combustion of cyclic oxygenated hydrocarbons as far we know.…”

“…Though oxidation and combustion of oxygenated hydrocarbon have been widely studied by varied methods as mentioned above, few investigations have been performed on cyclic oxygenated hydrocarbons. Battin et al reported an experimental investigation of oxidation of equimolecular mixtures 1,4-dioxane/O 2 in the early 1990s . The investigation showed that 1,4-dioxane reacted with oxygen more readily than most hydrocarbons, and a radical chain mechanism was suggested and discussed.…”