High Temperature Air Combustion Technology (HiCOT) is used to burn coal more efficiently and reduce pollution. Researchers studied how using high temperature air affects coal combustion and NOx emissions. They found that high temperature air helps ignite coal faster and reduces NOx emissions. By increasing air temperature, volatile release from coal is enhanced, leading to a stable flame even with high fuel ratios. The release of fuel-Near the burner reduces NOx formation, resulting in lower NOx emissions. This technology shows promise for reducing pollution from coal combustion.