Home – Home – Jornals – Thermophysics and Aeromechanics 2021 number 5

The paper presents the study of oxidation of benzene, pyridine, and pyrrole in a dense steam at uniform heating of the reactor. The time dependencies for temperature and pressure of reaction mixtures suggest that the fuel oxidation is enhanced by catalytic action of the Pt-Rh/Pt thermocouple inserted into the center of the reaction volume. It was shown that the fuel ignition temperature T _in^* increases within the fuel molecular series C₆H₆ < C₅H₅N < C₄H₄NH. The higher fuel equivalence ratio and steam density create a lower T _in^*. The benzene oxidation is a dual-stage process and it is described by low carbon burning. For a lean fuel mixture, combustion of pyridine occurs with detonation due to shock waves generation in the vicinity of the Pt-Rh/Pt thermocouple. The higher density of steam prevents the complete burnout of fuel. These features of fuel combustion are explained by differences in molecular structure and reactants adsorption on the platinum surface.