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|Conversion of waste polypropylene to liquid fuel using acid-activated kaolin
|Waste Management and Research, 2014, Vol.32, 10, pp.997-1004
|Waste polypropylene was subjected to thermal degradation in the presence of kaolin and acid-treated kaolin, with different catalyst-to-plastics ratios, in a semi-batch reactor at a temperature range of 400-550 C to obtain optimized process conditions for the production of liquid fuels. The effects of process temperature, catalyst and feed composition on yield and quality of the oil were determined. For a thermal decomposition reaction at up to 450 C, the major product is volatile oil; and the major products at a higher temperature (475-550 C) are either viscous liquid or wax. The highest yield of condensed fraction in the thermal reaction is 82.85% by weight at 500 C. Use of kaolin and acid-treated kaolin as a catalyst decreased the reaction time and increased the yield of liquid fraction. The major product of catalysed degradation at all temperatures is highly volatile liquid oil. The maximum oil yield using kaolin and acidtreated kaolin is 87.5% and 92%, respectively, at 500 C. The oil obtained was characterized using GC-MS for its composition and different fuel properties by IS methods. The Author(s) 2014.
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