Thermogravimetric experimental study on the co-combustion of coal gangue and polypropylene

To address the challenges posed by the challenging ignition, low volatile content, and high ash content of coal gangue (CG) during separate combustions, a proposed treatment involves mixing CG with polypropylene (PP), offering the potential for centralized treatment. Co -combustion experiments were carried out at varying ratios, and a corresponding model for co -combustion was established. The thermal impact of temperature variations during co -combustion is analyzed, and the kinetic characteristics of the co -combustion process are explored. The findings indicate that the volatile matter released by PP notably decreases the activation energy of the mixed fuel in the initial combustion stage. Co -combustion at different ratios enhances overall combustion, particularly when the PP content is 20 %. At this specific ratio, the temperature -averaged thermal relative coupling coefficients are 1.64 and 2.30 times greater than those at PP contents of 50 % and 80 %, respectively. These results hold significance for the comprehensive utilization of CG.