Selective enrichment of fractions in thermal dissolution of high-sulfur coal: Application of solid-phase microextraction technology and construction of ZnO/rGO coatings - Jia-Qi Liu; Xing Fan; Ran-Ran Hou; Xiao-Hui Cao; Binoy K. Saikia; Chao Feng; Jin-Xi Wu; Xiao-Yu Dong (Fuel, 2026)