Coal chemical looping gasification (CLG) is a pivotal technology for the clean utilization and efficient transformation of coalresources. It represents a novel and high-quality approach with distinctive innovative productivity and holds significant importance forsustainability. Coal CLG process mainly involves the reaction of different organic macerals in coal with gasification agents under the actionof oxygen carriers (OCs). However,the differences in the transformation behavior and mechanism of these macerals remain unclear. Inthis study,we used thermo-gravimetric analysis (TGA) to investigate the CLG characteristics of the vitrinite and inertinite componentsof Qinghua bituminous coal. We also analyzed the kinetics of CLG reaction based on gas-solid reaction models. The results showed thatthe chemical looping gasification reactions of vitrinite and inertinite correspond to three distinct reaction stages. The reactivity of vitrinitewas higher than that of inertinite at the same temperature. This is attributed to the greater structural stability of the inertinite compared tothe vitrinite. Additionally,nickel-based OCs exhibited a more pronounced catalytic effect upon the vitrinite. At different gasificationtemperatures,the carbon conversion rate of organic macerals increased with the gasification reaction time. Based on the fitting results ofthree gas-solid reaction kinetic models,the spherical shrinking core model effectively represented the CLG process of themicrocomponents in Qinghua bituminous coal. It emerged as the optimal mechanistic function. This model was selected to calculate the kinetic parameters of the CLG reaction. The activation energies for the vitrinite and inertinite were 169.78 kJ/mol and 176.46 kJ/mol,respectively. The higher activation energy of the inertinite indicates that it has poorer chemical looping gasification reactivity compared tovitrinite. This difference needs to be emphasized in the reaction process.

万慧凝(2001—),女,江西南昌人,硕士研究生。E-mail:nhwhn4260@163.com

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WAN Huining,WANG Qiang,YAO Qi,et al. Reactive characteristics and kinetic analysis of organic macerals in Qinghuabituminous coal via chemical looping gasification[J].Clean Coal Technology,2025,31(2):155−164.