Hydrocracking of virgin and post-consumer polymers
Hydrocracking of virgin and post-consumer polymers
Authors (3): A. B. Jumah, A. A. Tedstone, A. A. Garforth
Themes: Circular Economy
DOI: 10.1016/j.micromeso.2021.110912
Citations: 29
Pub type: journal-article
Pub year: 2021

Publisher: Elsevier BV

Issue:

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Publication date(s): 2021/02 (online)

Pages: 110912

Volume: 315 Issue:

Journal: Microporous and Mesoporous Materials

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URL: http://dx.doi.org/10.1016/j.micromeso.2021.110912

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 min 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).

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