Thesis (M.Sc.)--Chulalongkorn University, 2001

The main objective of this research was aimed to study the conversion of acrylonitrile-butadiene-styrene (ABS) into oil product using iron on activated carbon catalyst. Experiment was done in a microreactor width of 30 mm inside diameter and volume of 70 ml by varying operating conditions. Temperature and pressure of hydrogen gas were first varied between 390 and 450 ํC, 20 to 40 kg/cm2, respectively. While reaction time, amount of catalyst and percentage loading of iron were varied between 30 and 90 min, 0 and 0.75 g and 1, 5, 10% on activated carbon catalyst, respectively. The analyzed oil product from Gas Chromatography (GC Simulated Distillation) was found that iron on activated carbon catalyst was suitable to crack ABS. The optimum condition was 430 ํC, hydrogen pressure at 40 kg/cm2, reaction time 60 min, amounts of catalyst 0.6 g and independent of percent loading of iron. The product yield at this condition was in the range of 45% naphtha, 4.8% kerosene, 8.1% gas oil and 9.1% long residues. Moreover, the product showed aromatic functional group, by means of fourier-transform infrared spectrometer, which indicated the presence of high octane number and also showed low intensity of N-containing.