The non-isothermal gasification behavior of coal char with CO2 was comparatively studied in the newly developed micro fluidized bed reaction analyzer (MFBRA) and a commercial thermogravimetric analyzer (TGA). The reaction kinetics data were calculated according to the methods of single heating rate and combination heating rate. The experimental data demonstrated that heating rate had obvious influence on coal char gasification. Increasing heating rate evidently increased reaction initiation temperature (Tx≈0)

and reaction temperature corresponding to the maximum reaction rate (TRmax)

but it gradually decreased char conversion at a given temperature and the activation energy estimated by the method of single heating rate. Comparing the results from TGA and MFBRA at the same heating rate clarified that both Tx≈0 and TRmax were relatively lower for MFBRA

and the higher the heating rate

the larger the difference between MFBRA and TGA. The measurement using MFBRA led to higher activation energy for char-CO2 gasification

no matter the adopted estimation method of single heating rate (≥5℃·min-1) or combination heating rate. The difference in kinetics data tested by TGA and MFBRA at higher heating rate (≥5℃·min-1) could be much related to better heat transfer and lower diffusion inhibition.