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Catalytc cracking of palm oil to gasoline using zeolite catalysts

Siregar, Tirena Bahnur (2005) Catalytc cracking of palm oil to gasoline using zeolite catalysts. Masters thesis, Universiti Teknologi Malaysia, Faculty of Chemical and Natural Resources Engineering.

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Abstract

The refined, bleached and deodorized palm oil (RBDPO) was converted to gasoline by passing its vapor through catalyst in a fixed bed reactor at atmospheric pressure. The resulting gas and liquid products were analyzed with a gas chromatograph. The catalysts were characterized with X-ray diffraction (XRD), Pyridine absorption-infrared spectrophotometry (Py-IR) and nitrogen adsorption (NA) methods. The selection of a promising zeolite for palm oil cracking using H-ZSM-5 and H-Beta catalyst was performed with reaction temperature ranging from 450°C to 525°C and a weight hourly space velocity (WHSV) of 2.5h-1. The H-ZSM-5 produced the best results with 96.12 wt% palm oil conversion and 29.92 wt% of gasoline selectivity at 525°C. The gasoline contained mostly naphthenes, followed by isoparaffins, aromatics, and olefines. Pretreatment of H-ZSM-5 at hydrogen (H2) flow rate of 1 L/h for 1 hour gave higher gasoline selectivity and conversion of 34.96 wt% and 95.7 wt% at 500°C. Increasing the H2 flow rate for pretreatment catalyst decreased the conversion and gasoline selectivity. The gasoline composition was enriched with naphthenes, aromatics and isoparaffins. Loading copper (Cu) on H-ZSM-5 from 2 wt% to 8 wt% decreased the conversion and gasoline selectivity. Consequently, highest conversion of 86.30 wt% and gasoline selectivity and 19.53 wt% was obtained with 2 wt% of Cu-ZSM-5 catalyst. Copper loading effected in the decreasing of crystallinity, surface area and Brönsted acidity of HZSM-5. Gas as side products consisted mainly of C3 and C4 compounds. The coke was obtained about 1 wt%.

Item Type:Thesis (Masters)
Additional Information:Thesis (Master of Engineering (Chemical)) - Universiti Teknologi Malaysia, 2005; Supervisor : Prof. Dr. Nor Aishah Saidina Amin
Uncontrolled Keywords:catalyst, catalytc cracking, palm oil, gasoline, zeolite catalysts, palm oil cracking, hydrogen pretreatment
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Natural Resources Engineering (Formerly known)
ID Code:5349
Deposited By: Ms Zalinda Shuratman
Deposited On:28 Mar 2008 01:15
Last Modified:13 Jul 2012 03:15

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