Studies on explosion limits of butadiene-air mixture

Abstract

The explosion limits of butadiene-air mixtures were determined by means of the admission method and the reaction products, analyzed by gas-chromatography, were CO, CO_2, H_2O, C_2H_4, HCHO etc. The isochor curves show that the lowest butadiene composition of explosion is 20vol % and the explosion peninsula are found at 2～3 vol % of butadiene, under at 25 cmHg of pressure. The isobar and isotherm curves show U type. The reaction can be explained on the thermal explosion theory and the apparent activation energy is estimated to be about 32～34 kcal/mol at 2～30vol % of butadiene. The reaction consists of oxidation, and polymerization.