Combustion of Coal in an Opposed Flow Diffusion Burner. [14 Refs]. PDF Download

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

Get Book Here

Book Description
The utility of the opposed flow diffusion flame (OFDF) apparatus for the study of the steady state combustion of gaseous, liquid, and polymer fuels has been recognized and utilized by a number of researchers. We have employed this configuration to observe the steady state diffusion flame combustion of pressed pulverized coal and graphite in an opposed flow of an oxygen/nitrogen mixture. Initial efforts have focused upon the pressing of pulverized coal into cylindrical rods of homogeneous properties, including the effect of binders and water content, the demonstration of the possibility of steady state burning of a fuel with a significant ash production, the determination of sample porosity, the measurement of burning (linear regression) rates, and the investigation of the primary experimental parameters, oxidizer flow velocity and oxygen fraction. Burning rates were observed to increase with oxidizer velocity and oxygen mole fraction. Because of the well controlled combustion environment and steady state burning which are characteristics of this experimental technique, additional measurements are suggested and are being pursued. These include the determination of the solid and gas phase temperature profiles, extraction of thermal diffusivity data under burning conditions, measurement of gas phase composition profiles, investigation of the relative importance of surface oxidation by oxygen and by carbon dioxide, and the determination of the fate of nitrogen contained in the fuel.