Computation of equilibrium states for products of hydrocarbon combustion under oxygen lack

Abstract

A unified approach to the computation of equilibrium in combustion products of oxygen mixtures overriched with hydrocarbon fuel, when both gaseous and condensed carbon phases may appear simultaneously among the components of chemical reaction, has been formulated. Within the framework of this approach, the problem of determining the equilibrium parameters (pressure, density, temperature, etc) of chemical reaction products produced at explosion of acetylene-oxygen mixture in a closed volume as the values of molar fraction of fuel (acetylene) vary up to the values when oxygen in the mixture is almost absent has been solved.

On melting temperature of carbon produced in detonation combustion of acetylene

“…To close the system of equations ( 1)-( 3), we will use a unified approach to the calculation of equilibrium states of the closed thermodynamic system consisting of the products of hydrocarbon combustion under the lack of oxygen [4]. Thus, we characterize the atomic composition of the system by relative concentrations of atoms of oxygen…”

“…it partial pressure. One of calculating variables s y in a chemical reaction is described in detail in [4] and therefore it is not given here. This calculation method (provided that CO zz  ) is unified since it allows us to determine molar fractions of components of combustion products in equilibrium state taking into ( R is a gas constant).…”

“…When studying physical and chemical properties of DNCM, we need to know conditions (pressure and temperature), under which it is formed behind a detonation wave. Thus, in [4], a unified approach to the calculation of equilibrium states of products of hydrocarbon combustion under the lack of oxygen was formulated. This approach is formulated based on the analysis of previously established regularities.…”