PP의 열분해에 의한 액화 특성

Liquefaction Characteristics of PP by Pyrolysis

Pyrolysis of polypropylene(PP) Was performed to find the effects of the pyrolysis temperature(425, 450, 475 and 500oC) and the pyrolysis time(35, 50 and 65minutes), respectively. Conversion and liquid yield obtained during PP pyrolysis continuously increased with the pyrolysis temperature( up to 500oC ) and the pyrolysis time(up to 65minutes), especially these were more sensitive to the pyrolysis time at 425oC than other pyrolysis temperatures. Each liquid product formed during the pyrolysis was classified into gasoline, kerosene, light oil and wax according to the distillation temperature based on the petroleum product quality standard of Korea Petroleum Quality Inspection Institute. The liquid products of PP pyrolysis up to 450oC were almost same fractions(26 +- 3 wt.% gasoline, 20+-2 wt.% kerosene and 23+-2 wt.% light oil) except wax(3~13 wt.%). On the other hand, the pyrolysis of PP from 475oC to 500oC produced 25+-3 wt.% wax, 24+-1 wt.% gasoline, 18+-1 wt.% kerosene and 16+-1 wt.% light oil. After all, the main liquid product changed from gasoline to wax with increasing pyrolysis temperature.