A new char combustion kinetic model - Part 2: Empirical validation

A new kinetic model for the combustion reactivity of char from pulverized coal was developed by means of dimensional analysis using the Rayleigh method. This model was published in Fuel 88 (2009) 2335-2339, “A new char combustion kinetic model. Part 1. Formulation”. In this work, the required parameters to validate the kinetic model were derived from experimental data from chars produced in a drop tube reactor using three devolatilization times (100, 150 and 300 ms), three devolatilization temperatures (900, 1000 and 1100 °C in a nitrogen environment) and three bituminous coals (two Colombian coals, La Yolanda and El Cerrejón, and one UK coal, Thoresby). The empirical results show that there is good agreement with the obtained experimental results, which can be predicted by the intrinsic reactivity of the coals.