— A series of redox reactions occur between Fe 2 O 3 in RM-based additives and reducing agents, such as solid phase carbon, H 2 and CO, in coal pyrolysis system with the gradual reduction process of Fe 2 O 3 →Fe 3 O 4 →FeO→Fe, which impact the product distribution significantly. Addressed concretely, the release of non-condensable light ...