Gasification of Coal by CO2: The Impact of the Heat Transfer Limitation on the Progress, Reaction Rate and Kinetics of the Process

This paper presents the impact of thermal lag on progress different coal types’ gasification by CO2. The analysis was performed using thermogravimetry and numerical modeling. Experiments were carried out at a heating rate 1–50 Kmin−1 temperature ranging from 383 to 1173 K. developed model enabled determination true sample considering process consist two single-step consecutive reactions. Analysis revealed that average in CO2 is about 11% greater than N2, which related properties itself occurrence char–CO2 reaction. onset reverse Boudouard reaction depends type fuel; however, no simple relationship with rank found. Thermal has an kinetic parameter Aα0.5 describing devolatilization, up 19.8%, while case reaction, this influence expected be even greater. proved disregarding may significantly hinder interpretation analyzed processes; thus, TG experiments should low rate, or post-processing stage, needs employed.