Abstract:
Seven bituminous coals were pretreated through Sohxlet extraction,rotation concentration and column purification,and seventeen PAHs tested by GC to investigate the distribution characteristics of PAHs in bituminous coals.It was found that the maximum point of total PAHs occurs in 80%~83% of the region,with dry ash free carbon mass fraction of 75%~80%.With the increase of coalification degree,the content of PAHs with more rings increases.Also,carbon content,volatile content,O/C mole ratio,and H/C mole ratio have some relationships with PAHs concentration in bituminous coals.