Thesis (M.Sc.)--Chulalongkorn University, 2004

To study the catalytic cracking of acrylonitrile-butadiene-styrene (ABS) and used lubricating oil with Fe/activated carbon catalyst. The 5 wt % Fe/activated carbon catalyst was prepared. The catalytic reaction was done in micro-reactor volume of 70 ml by varying operating conditions which were used-lubricating oil and ABS were from 6:4 to 9:1, reaction temperature range of 400 to 470 ํC, reaction time range of 45-120 minutes, initial hydrogen pressure range of 0 to 200 psi, and mass of catalyst was varied between 0-5% by wt respectively. The analyzed oil product from gas chromatography (GC Simulated distillation) was found that Fe/activated was suitable to crack ABS and used-lubricating oil. The optimum condition was the ratio of used lubricating oil and ABS 6:4, reaction temperature 430-450 ํC, initial hydrogen pressure 100 psi, 90 minutes of reaction time and 2.5% by wt of Fe/activated carbon catalyst. The product from the optimum condition was 22.7-23.4% of gas 62.6-63.8% of oil and 13.5-13.9% of solid. The oil products distribution were 37.9-38.6% of gasoline, 7.14-7.64% of kerosene, 12.2-13.2% of light gas oil, 1.40-1.48% of heavy gas oil, 2.38-4.44% of long residue. Moreover, functional groups of product analyzed by FT-IR also show the same position as those of gasoline octane number 95.