THE PROCESS OF SOLID CARBON DEPOSITION IN THE COURSE OF PYROLYSIS OF HYDROCARBON GASES

Abstract

The results of experimental research of the process of solid carbon deposition from heated mixture of hydrocarbon gases into the volume and to the surface of particles of quartz sand in the reactors of fluidized bed with the external heating and with heating due to current passing through the fluidized bed (electrothermal fluidized bed) are shown in the article. Calculations of dependence of carbon potential difference of gas mixture and solid carbon (graphite) on temperature and proportion mixture were carried out for theoretical interpretation of measurement outputs. Obtained values of carbon potential difference made it possible to give the quantitative measure of gas mixture distance from its equilibrium with the solid carbon. At the same time, the values of excessive carbon in gas mixture were calculated. Comparison of calculated highest possible quantity of carbon surplus in gas mixture and measured quantity of actually deposited solid carbon made it possible to estimate the efficiency of the process of solid carbon formation in each reactor applying the stated hydrocarbon mixture and processing conditions. It was found that the mixture based on propane is more efficient than the mixture based on methane. These results were obtained in laboratory reactor with the external heating. Bibl. 11, Fig. 2, Table 3.