Study on Catalytic Gasification of Ferrocoke by Iron Carbon Dust Sludge

This study uses iron–carbon dust in place of iron ore powder to prepare ferrocoke. A gasification experiment is conducted and several kinetic models are used to simulate the ferrocoke gasification process, aiming to clarify how iron–carbon dust affects its kinetics. The microstructure of ferrocoke and the degree of carbon structure ordering are characterized using scanning electron microscopy, X‐ray diffraction (XRD), and Raman spectroscopy. Gasification data show that the addition of iron–carbon dust reduces the initial gasification temperature of ferrocoke. Kinetic fitting results reveal that iron–carbon dust alters the reaction‐controlling step from chemical reaction limitation to internal pore diffusion control while catalyzing the reaction. This confirms that the gasification process is influenced by pore/characteristics, aligning with the RPM model. XRD and Raman spectroscopy analyses further show that as the proportion of iron–carbon dust increases, the structural orderliness of the iron–carbon matrix decreases, while the amount of amorphous carbon increases. This structural transformation significantly enhances the gasification activity of the iron–carbon matrix.