Kinetics of the oxidation of carbon black by NO2

Kinetics and mechanism of the oxidation of carbon by NO2 in the presence of water vapor

“…Figure 2 shows the oxidation rate of carbon as a function of temperature in the absence and presence of 5%-10% b.v of water vapor in the gas phase. As already reported, an increase of the carbon oxidation rate is observed in presence of water [14,15,19]. The presence of water increases the rate of carbon consumption at all studied temperatures.…”

“…To extract the kinetic constants from the experiments performed in the fixed bed reactor with or without presence of H 2 O, we have used a monodimensional model developed in our previous study [19].…”

Flame soot generated under controlled combustion conditions: Heterogeneous reaction of NO2 on hexane soot

“…A number of studies have examined the heterogeneous reactions of NO 2 with the surface of soot particles in view of the fact that NO is unreactive under most experimental conditions. The rate of black carbon oxidation by NO 2 for temperatures above 475 K leads to the formation of NO, CO, and CO 2 [27] in distinct contrast to ambient temperature, which is discussed later. The heterogeneous reaction of NO 2 on soot has also been investigated as a simulated diesel exhaust plume in a dielectric barrier discharge reactor where NO, HONO, and other products have been observed [28].…”

The role of NO2 and O2 in the accelerated combustion of soot in diesel exhaust gases

“…It is, therefore, not surprising that the kinetic regime usually studied is far from that under realistic conditions as occurring in the after-treatment system of a diesel engine. Recently, a study has been conducted to extract the kinetics of the reaction of NO 2 with carbon black in the presence of O 2 and H 2 O in a temperature range relevant to the CRT system [7]. Gray et al studied the dynamics of NO 2 and carbon reaction gravimetrically over the temperature range of 423-623 K [8].…”