Assessment of combustion rates of coal chars for oxy-combustion applications

A drop tube reactor with high heating rates typical of pulverized boilers (> 10(4) K/s) has been used to carry out experiments with coal in different atmospheres: N-2, CO2, O-2/N-2 and O-2/CO2. The reactor wall temperature was set at 1573 K and the particles' residence time was kept below 130 ms.