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Selective recycling of BTX hydrocarbons from electronic plastic wastes using catalytic fast pyrolysis
RISE Research Institutes of Sweden, Bioeconomy and Health, Biorefinery and Energy.ORCID iD: 0000-0002-8284-4172
KTH Royal Institute of Technology, Sweden.
RISE Research Institutes of Sweden, Bioeconomy and Health, Biorefinery and Energy.ORCID iD: 0000-0001-9126-0155
RISE Research Institutes of Sweden, Built Environment, System Transition and Service Innovation.ORCID iD: 0000-0002-9949-6274
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2022 (English)In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 605, article id 154734Article in journal (Refereed) Published
Abstract [en]

Non-catalytic and catalytic pyrolysis of two waste electrical and electronic equipment (WEEE) fractions, with two different copper contents (low- and medium-grade WEEE named as LGE and MGE, respectively), were performed using micro- and lab-scale pyrolyzers. This research aimed to fundamentally study the feasibility of chemical recycling of the WEEE fractions via pyrolysis process considering molecular interactions at the interfaces of catalyst active sites and WEEE pyrolyzates which significantly influence the chemical functionality of surface intermediates and catalysis by reorganizing the pyrolyzates near catalytic active sites forming reactive surface intermediates. Hence, Al2O3, TiO2, HBeta, HZSM-5 and spent FCC catalysts were used in in-situ micro-scale pyrolysis. Results indicated that HBeta and HZSM-5 zeolites were more suitable than other catalysts for selective production of aromatic hydrocarbons and BTX. High acidity and shape selectivity of zeotype surfaces make them attractive frameworks for catalytic pyrolysis processes aiming for light hydrocarbons like BTX. Meanwhile, the ex-situ pyrolysis of LGE and MGE were carried out using HZSM-5 in micro- and lab-scale pyrolyzers to investigate the effect of pyrolysis configuration on the BTX selectivity. Although the ex-situ pyrolysis resulted in higher formation of BTX from LGE, the in-situ configuration was more efficient to produce BTX from MGE. © 2022 The Author(s)

Place, publisher, year, edition, pages
Elsevier B.V. , 2022. Vol. 605, article id 154734
Keywords [en]
BTX, Catalytic fast pyrolysis, Monoaromatic hydrocarbons, Selective recycling, WEEE, Zeolite solid acids, Alumina, Aluminum oxide, Aromatic hydrocarbons, Catalyst activity, Electronic Waste, Oscillators (electronic), Pyrolysis, Recycling, Titanium dioxide, Catalytic fast pyrolyse, Catalytic pyrolysis, Fast pyrolysis, Monoaromatic hydrocarbon, Pyrolyzers, Solid acid, Waste electrical and electronic equipment, Zeolite solid acid, Zeolites
National Category
Other Materials Engineering
Identifiers
URN: urn:nbn:se:ri:diva-60149DOI: 10.1016/j.apsusc.2022.154734Scopus ID: 2-s2.0-85137170603OAI: oai:DiVA.org:ri-60149DiVA, id: diva2:1699942
Note

Funding details: Energimyndigheten, 51219-1; Funding text 1: This research was supported by the Swedish Energy Agency via the project number 51219-1. The authors would like to thank Boliden Rönnskär for providing the raw WEEE fractions for this research.

Available from: 2022-09-29 Created: 2022-09-29 Last updated: 2023-05-09Bibliographically approved

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Shafaghat, HodaJohansson, Ann-ChristineEvangelopoulos, Panagiotis

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