Fluorescent characteristic of sapropelic coal in pyrolitic simulation on secondary hydrocarbon generation

Analyses of secondary hydrocarbon generation in sapropelic coal and its residue from pyrolitic simulation are resulted in two conclusions:(1)While secondary hydrocarbon generation begins,the phenomena of blue shift takes place,it marks the start of secondary hydrocarbon generation;(2)the location (marked with the maturity of vitrinite) and strength of the phenomena generating have affinity with original maturity,with original maturity increasing,the location gradually moves back;the difference between generating maturity and original maturity will increase at first and then decrease,the turning point is suggested in the range of 1.46%~1.80% (Ro,max).