Degradation of High-Density Polyethylene into Liquid Fuels Using Microporous and Mesoporous Catalysts
The potential application of acidic HZSM-5 and AlSBA-15 materials for catalytic degradation of high-density polyethylene (HDPE) into liquid hydrocarbon fuels was investigated using a tubular batch reactor. The reaction was carried out at various catalyst loadings between 5 and 15 % with 1:1, 2:1, and 3:1 HZSM-5 to AlSBA-15 ratios. The catalysts exhibited remarkable catalytic activity with conversions into liquid light hydrocarbons of up to 25 %. The gaseous product distribution showed a wide spectrum of hydrocarbons (C1–C5) while the most predominant products were C3 and C4 (47 and 40 %, respectively). Meanwhile, the liquid products were mostly in the range of C8–C25 depending on the reaction parameters and the amount produced decreased with increasing carbon number. Thus, catalytic degradation of HDPE was a promising route for obtaining valuable fuels and petrochemicals from waste polymers. It required relatively low degradation temperatures to obtain liquid hydrocarbons with boiling points within that of gasoline range. At the same time, it could reduce the environmental problems caused by waste polymers.
KeywordsHigh-density polyethylene HZSM-5 ALSBA-15 Catalytic degradation Hydrocarbon fuel
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