(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 (1300~1600â). 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 â, which means SE residue is a promising precursor candidate for SiC synthesis.