Abstract
This document is the eleventh quarterly status report on a project that is concerned with enhancing the transformation of iron pyrite to non-slagging species during staged, low-NO{sub x} pulverized coal (P.C.) combustion. The research project is intended to advance PETC`s efforts to improve the technical understanding of the high-temperature chemical and physical processes involved in the utilization of coal. The work focuses on the mechanistic description and rate quantification of the effects of fuel properties and combustion environment on the oxidation of iron pyrite to form the non-slagging species magnetite. Activities during this report period were associated with the numerical encoding of the pyrite combustion model. The computer program resulting from the efforts put forth is intended to provide predictive capabilities with respect to pyrite composition during pulverized coal firing. The subroutines that have been written to track the fate of a pyrite particle of specified size and composition flowing in a gaseous environment of specified oxygen concentration, temperature, and velocity are being debugged and tested.
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