(195j) Synthesis Carbide from Supercritical CO2-Ethanol Extraction Residues of Powder River Basin Coal

In this research, supercritical extraction residue (SE residue) was used to synthesis carbide. SE residue was obtained from supercritical CO₂-ethanol extraction of Powder River Basin coal (PRB coal). The residue was then used to synthesize carbides under argon (Ar) atmosphere at high temperatures (1300~1600℃). N₂ adsorption/desorption, scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) were applied to study composition and structure of SE residue and synthesized carbide particles. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) were used to determine the existence of carbide species and X-ray fluorescence (XRF) was used to quantify synthesized carbides. From the obtained results, silicon carbide (SiC) can be synthesized from SE residue under Argon (Ar) atmosphere at temperatures around 1500 ℃, which means SE residue is a promising precursor candidate for SiC synthesis.