Thesis (M.Sc.)--Chulalongkorn University, 2000

The main objective of this research was aimed to study the conversion of polyethylene into gasoline using HZSM-5 catalyst in a microreactor width of 30 mm inside diameter by varying operating conditions as pressure of hydrogen gas range of 10 to 30 kg/cm2, reaction temperature range of 400 to 480 ํC and reaction time range of 30 to 60 min for each catalyst. From the results, it was found that reaction temperature of 450 ํC was the temperature that yielded the highest quantity of oil product. This temperature was also used in studying the effect of pressure for hydrogen gas, reaction time and mole ratio Si/Al of HZSM-5 catalyst. The analyzed oil product from Gas Chromatography (GC simulated Distillation) was found that HZSM-5 was suitable and used as catalyst at 450 ํC, hydrogen pressre at 30 kg/cm2 and reaction time 60 min. The product yield was in the range 20-45% Naphtha, 8-16% Kerosene, 9-16% Gas Oil and 3-14% Long Residues.