Estimation of upper flammability limits of C–H compounds in air at standard atmospheric pressure and evaluation of temperature dependence

Abstract

This study focuses on estimating the upper flammability limits of C–H compounds. A method was developed to determine the upper flammability limits in air at standard atmospheric pressure for the following cases: (a) estimation of the UFLs of pure C–H compounds at standard ambient temperature (25°C); (b) estimation of the UFLs of binary mixtures of C–H compounds at standard ambient temperature (25°C); (c) estimation of the UFLs of C–H compounds at different initial temperatures. The method was accurate in all cases. In case (a), for a total set of 115 compounds, the absolute average relative error was 7.27% and a squared correlation coefficient of 0.9248 was obtained. In case (b), the average absolute relative error was 5.55%; in case (c) it was 2.19%.