Effect of Kaolin on the Thermal Conversion Performance of Zhundong Sub-bituminous Coal.

In order to investigate how kaolin affects the structure and thermal conversion performance of Zhundong sub-bituminous coal (ZSBC), this study focused on analyzing the pyrolysis, combustion, and gasification of both ZSBC and a mixture of kaolin and Zhundong sub-bituminous coal (ZSBC-K) using the TG-DTG technique. The findings demonstrated that the addition of kaolin enhanced the pyrolysis and combustion performance of ZSBC-K. To explain the above phenomena, the composition and structure of char from ZSBC and ZSBC-K were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Raman spectroscopy (Raman), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS).