High pressure intrinsic char oxidation kinetics of Pittsburgh no.8 and north Dakota lignite chars

摘要

Char oxidation is a critical process in the combustion of coal and other carbonaceous fuels. While most kinetic data for the oxidation of chars have been obtained at atmospheric pressure, many coal combustion applications operate at elevated pressures. Thus, there is a need to determine the kinetics of char oxidation at pressures greater than atmospheric. In this study the intrinsic char oxidation kinetics of Pittsburgh no.8 and North Dakota Lignite (NDL) chars produced at high heating rates in an atmospheric flat-flame burner were determined at pressures up to 32 atmospheres.