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Catalytic activity of acid-treated biomass for the degradation of expanded polystyrene waste

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Abstract

Pyrolysis processes were investigated using expanded polystyrene waste (EPW) with a catalyst synthesized from rice husk (RH). Biomass was treated with different acids, i.e., sulfuric acid, oxalic acid, and hydrochloric acid. The effect of normality on the oxalic acid-treated catalyst and the effects of polymer to catalyst ratio on (i) oil, gas, and residues yields; (ii) temperature; and (iii) time for the complete reaction were investigated for the effective use of oil for fuel production. The catalyst treated with 0.25 N (RHOA0.25) resulted in a high oil yield of 96 wt% and a residue yield of 3.47 wt%. The oil produced contained mainly aromatic compounds, which contributed 67.86% in an area-based GC-MS analysis. The synthesized catalyst showed a stable capacity for three regeneration runs. The significant factor is that the synthesized catalyst decreased the activation energy during the pyrolysis of EPW.

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Funding

Authors are grateful to University Grants Commission, India, Maulana Azad national fellowship for providing the financial support. Industrial consultation and research, Department of Chemistry and sophisticated analytical instrumentation facility (SAIF), IIT Madras.

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Correspondence to Lima Rose Miranda.

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Responsible editor: Bingcai Pan

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Rex, P., Miranda, L.R. Catalytic activity of acid-treated biomass for the degradation of expanded polystyrene waste. Environ Sci Pollut Res 27, 438–455 (2020). https://doi.org/10.1007/s11356-019-07034-5

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  • DOI: https://doi.org/10.1007/s11356-019-07034-5

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