Hydrocracking of virgin and Post-Consumer Polymers

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Abstract

With the growing concern around polymer waste sent to landfill and its environmental release, one effective route for polymer recycling is hydrocracking over bifunctional zeolites. Zeolite Beta impregnated with 1% Pt has demonstrated high conversion of single and mixed streams of virgin and post-consumer polymers, LDPE, HDPE, PP and PS under mild reaction conditions of 330°C, 20 bar H2 and a 30 minute reaction time. The PE and PP streams giving a similar mix of low molecular weight hydrocarbons with higher selectivity toward gases (typically, C3-C4) and also, obtaining high iso- to normal paraffin ratio. PS was readily converted into an aromatic-rich product under these mild conditions and demonstrated the ability to be a source of benzene and ethylbenzene for use as raw materials in further polymer production. Dealuminated zeolite USY with 1% Pt increased the selectivity toward liquid products and resulting in more naphtha (C5-C12) and heavier liquids (C13-C20).

Bibliographical metadata

Original languageEnglish
JournalMicroporous and Mesoporous Materials
Publication statusAccepted/In press - 16 Jan 2021

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