| Slagging combustors with injected lime or limestone are being considered as replacements for conventional coal burners. They have advantages in that they can be staged to reduce NO;A comparison is made between lime and iron oxide as desulfurizing agents. With lime, the thermodynamic conditions are chosen: a set of conditions where the compound calcium sulfide is the product and a set of conditions where calcium sulfate is the product. The temperature limits of the sulfate forming and sulfide forming reactions are defined.;The thermodynamic conditions for optimum removal of sulfur with iron oxide from the first stage of a coal combustor have been determined by the thermodynamic analysis. Contour curves of the percentage of sulfur removal are plotted on isothermal ternary phase diagrams of the Fe-S-O system. These contour plots determine the most favorable conditions for coal combustion in the presence of added iron oxide. Lowest SO;The kinetic TGA experiments show that the whole process, from magnetite Fe... |
