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Entrained flow gasification of polypropylene pyrolysis oil
RISE Research Institutes of Sweden, Bioeconomy and Health, Biorefinery and Energy.ORCID iD: 0000-0003-2890-3546
VTT, Finland.
RISE Research Institutes of Sweden, Bioeconomy and Health, Biorefinery and Energy.
VTT, Finland.
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2021 (English)In: Molecules, ISSN 1431-5157, E-ISSN 1420-3049, Vol. 26, no 23, article id 7317Article in journal (Refereed) Published
Abstract [en]

Petrochemical products could be produced from circular feedstock, such as waste plastics. Most plants that utilize syngas in their production are today equipped with entrained flow gasifiers, as this type of gasifier generates the highest syngas quality. However, feeding of circular feedstocks to an entrained flow gasifier can be problematic. Therefore, in this work, a two-step process was studied, in which polypropylene was pre-treated by pyrolysis to produce a liquid intermediate that was easily fed to the gasifier. The products from both pyrolysis and gasification were thoroughly characterized. Moreover, the product yields from the individual steps, as well as from the entire process chain, are reported. It was estimated that the yields of CO and H2 from the two-step process were at least 0.95 and 0.06 kg per kg of polypropylene, respectively, assuming that the pyrolysis liquid and wax can be combined as feedstock to an entrained flow gasifier. On an energy basis, the energy content of CO and H2 in the produced syngas corresponded to approximately 40% of the energy content of the polypropylene raw material. This is, however, expected to be significantly improved on a larger scale where losses are proportionally smaller. © 2021 by the authors. 

Place, publisher, year, edition, pages
MDPI , 2021. Vol. 26, no 23, article id 7317
Keywords [en]
Chemical recycling, Gasification, Plastic waste, Pyrolysis, Syngas
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:ri:diva-57332DOI: 10.3390/molecules26237317Scopus ID: 2-s2.0-85120819446OAI: oai:DiVA.org:ri-57332DiVA, id: diva2:1622354
Note

Export Date: 16 December 2021; Article; CODEN: MOLEF; Correspondence Address: Weiland, F.; RISE Energy Technology Center AB, Box 726, Sweden; email: fredrik.weiland@ri.se; Funding details: Teknologian Tutkimuskeskus VTT; Funding text 1: Funding: This research was funded by RISE Research Institutes of Sweden and VTT Technical Research Centre of Finland, respectively. Additionally, the gasification part of the work received funding from the B4G node of Swedish Gasification Centre (SFC).

Available from: 2021-12-22 Created: 2021-12-22 Last updated: 2023-08-28Bibliographically approved

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Weiland, FredrikShafaghat, HodaJohansson, Ann-Christine

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