Production of green fuel by catalytic cracking of waste cooking oil using different metal modified zeolite catalysts at different reaction temperatures
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Date
2019-06
Authors
Joan Mary A/P Patrick George
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Abstract
Vegetable oil is used as a feedstock and is converted to fuel due to its high energy density, liquid nature and its availability as a renewable source. Nevertheless, waste cooking oil has also gained substantial attention because it does not cause food vs fuel competition and is cheaper. Catalytic cracking is one of the most effective ways to process waste cooking oil by cracking in the presence of catalyst. This project discusses the effect of various zeolite catalysts, the effect of metal modified zeolite catalyst and also the effect of different reaction temperatures on the performance of catalytic cracking of waste cooking oil. Waste cooking oil was cracked at reaction temperatures of 250, 300 and 350°C and weight hourly space velocity of 1 hr-1 to produce green fuel in a fixed bed reactor. Nitrogen with flow rate of about 200 ml/min was used as a carrier gas. The reaction was performed over ZSM-5, zeolite Y and mordernite zeolite catalysts and modified with Fe, Cu and Ni metals in order to study the influence of catalysts on catalytic cracking. The products obtained were analyzed by gas chromatography and they were classified into gasoline, kerosene and diesel boiling point range. The maximum yield of lighter hydrocarbons (gasoline, kerosene and diesel) was obtained when catalytic cracking was performed using Ni/ZSM-5 at reaction temperature of 350°C.