Energy Sources Part A-recovery Utilization and Environmental Effects, Vol.32, No.7, 620-627, 2010
Effect of Charring Temperature on the Composition and Solubility of Chars Formed from Rapid Heating of Shenfu Coal
A series of chars were prepared by rapidly heating Shenfu coal, a Chinese bituminous coal, to different temperatures. Ash, volatile matter, and elemental contents of the chars were compared. The chars were extracted with carbon disulfide, benzene, and tetrahydrofuran sequentially, and the extraction solutions were analyzed with gas chromatography/mass spectrometer (GC/MS). The results show that raising charring temperature increases the ash and carbon contents, but decreases the hydrogen and nitrogen contents as well as the solubility, while change in sulfur content is very small with charring temperature. A series of alkanes and polycyclic arenes were detected in the extraction solutions.