Investigation on the thermal behavior characteristics and products composition of four pulverized coals: Its potential applications in coal cleaning

摘要: Abstract Although the thermochemical conversion of coal has dominated research concerning primary chemical production in industry utilization field, obtaining higher tar yield and lighter quality remain as challenges. The pyrolysis its product distribution were studied using a thermogravimetric analyzer fixed bed reactor. A gas chromatograph (GC) chromatograph−mass spectrometer (GC-MS) employed to test properties composition pyrolytic products. Here, we demonstrated that only fluctuates when carbon content is approximately 80%. ratios aliphatic hydrogen all functional groups (Ib1) are largest HM2 coal, while change aromatic (Ib2) same yield. With increase coalification, ratio CH2 CH3 structure (Ic1) decreases. oxygen containing YL mostly converted into products, but corresponding ZC3 decompose form more water. When final temperature below 550 °C, there was gaseous products than hydrogen. decrease H/C ratio, relative hydrocarbon phenolic compounds increased, benzene series polycyclic hydrocarbons decreased.