Thesis (M.Sc.)--Chulalongkorn University, 2003

The main objective of this research was aimed to study the distribution of oil product from cracking styrene-acrylonitrile copolymer using HZSM-5 catalyst. Experiment was done in a microreactor width of 30 mm inside diameter and volume of 70 ml by varying operating conditions. Temperature and amount of catalyst were first varied between 380 to 450 ํC, 0 to 2.5% by weight, respectively. While reaction time and pressure of hydrogen gas were varied between 30 to 90 min, 0 to 300 psig, respectively. The analyzed oil product from gas chromatography (GC Simulated Distillation) was found that HZSM-5 catalyst was suitable to crack SAN. The optimum condition was 430 ํC, amounts of catalyst 1.25% by weight, reaction time 60 min and hydrogen pressure at 200 psig. The product yield at this condition was in the range of 45.07% naphtha, 6.03% kerosene, 12.41% gas oil and 11.95% long residues. Moreover, the product showed aromatic functional group by means of Fourier Transform Infrared Spectrometer, same spectrum of benzene oil octane number 95.