Measurement and modeling of individual carbonaceous particle temperature profiles during fast CO2 laser heating: Part 2. Coals

In part 1, we discussed the temperature profiles of laser heated spherical carbonaceous particles along with the temperature modeling. In this paper, we perform the same set of experiments with selected coal particles. Coals of three different ranks (i.e. degree of coalification) represented by three different particle sizes (80, 100, and 120 μm), with and without aerodynamic size classification, were analyzed under the same set of experimental conditions. The temperature profiles were modeled using a heat transport model modified to include chemical kinetics (based on the FG-DVC model). Non-aerodynamically size-classified particles displayed better model prediction when laser heated in nitrogen atmosphere compared with heating in air. Best model predictions, however, were obtained in the case of aerodynamically size-classified particles heated under nitrogen atmosphere.