Pyrolysis Characteristics of Maceral Concentrates from Shendong Coal in Western China

Pyrolysis characteristics of Shendong coal maceral concentrate were investigated by a thermogravimetric analyses (TGA) apparatus and a fixed-bed reactor. Vitrinite has a higher pyrolysis reactivity and final pyrolysis weight loss than inertinite for Shendong coal. The more the inertinite content of a maceral concentrate mixture is, the higher the pyrolysis reactivity temperature is. There is an obvious synergy between inertinite and vitrinite. The fitting curve equations of characteristic parameters on vitrinite and inertinite mixture during pyrolysis could better reflect the pyrolysis properties of Shengdong raw coal. This will play a directional role on the coal pyrolysis process study. The pyrolysis gas products mainly contain H-2, CO, CO2, CH4, and other hydrocarbon gases, and different gas presents a different evolution trend during pyrolysis. The total contain-H gas release yield for vitrinite is more than inertinite and the total contain-O gas release yield is the reverse.