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Preparation, characterization, and catalytic activity test of sulfated zirconia (SZ) modified with chromium for hydrocracking of LDPE-based plastic waste have been investigated. SZ was prepared by wet impregnation method using zirconia nanopowder (ZrO 2 ) and H 2 SO 4  solution. SZ was further modified with chromium (0.5, 1.0, and 1.5% wt.%) by refluxing SZ in aqueous solution of Cr(NO 3 ) 3 ·9H 2 O, followed by calcination and reduction processes. The prepared catalysts were characterized by SEM-Mapping and TEM. Hydrocracking of LDPE-based plastic waste was conducted at various temperatures and various catalysts. In addition, the optimum catalyst was repeatedly used for the reaction to demonstrate the stability of the catalyst. Liquid products obtained by the hydrocracking were characterized by GCMS. The results showed that the prepared catalysts had the different sizes and disordered shapes of the catalyst morphology after the addition of sulfate and Cr. The effective temperature for hydrocracking was 250 °C. The highest selectivity to liquid product and gasoline fraction were 40.99 and 93.42 wt.%, respectively, were obtained over Cr/SZ with 1.0 wt.% Cr. Hydrocracking of plastic waste over the used Cr/SZ catalyst with 1.0 wt.% Cr showed that Cr/SZ catalyst was stable and reusable up to three repetitions.

Fuel Production from LDPE-based Plastic Waste over Chromium Supported on Sulfated Zirconia