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Influence of CaO on the thermal kinetics and formation mechanism of high value-added products during waste tire pyrolysis
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, China.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science. State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, China.ORCID iD: 0000-0002-2209-7558
State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, China.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
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2022 (English)In: Journal of Hazardous Materials, ISSN 0304-3894, E-ISSN 1873-3336, Vol. 436, article id 129220Article in journal (Refereed) Published
Abstract [en]

There is a lack of detailed research on the production of isoprene and D-limonene by solid base-catalysed thermal depolymerization of waste tires (WTs). This work aimed to investigate the thermal decomposition characteristics, reaction kinetics, high value-added products production and potential mechanisms during WT pyrolysis in the presence of calcium oxide (CaO) via Thermogravimetry-Fourier Transform Infrared spectrometer (TG-FTIR) and Pyrolyzer-Gas Chromatography/Mass spectrometry (Py-GC/MS). The results obtained from TG indicated that CaO accelerated depolymerization in terms of reducing the reaction temperature, which is also reflected in the kinetic parameters. It can be found that the content of D-limonene increased by 13.76% and that of isoprene increased by 37.57%, which were attributed to differences in the depolymerization mechanisms in the presence of CaO. Furthermore, CaO had a profound impact on desulfurization by reducing benzothiazole, sulfoacid, and thiophene. The potential catalytic mechanisms of isoprene and D-limonene production and desulfurization were also proposed. This work deepens the understanding of the catalytic pyrolysis of WT under CaO and unambiguously demonstrates the great potential of CaO in enhancing isoprene and D-limonene production, providing new insight for the cleaner production of high value-added products from WT.

Place, publisher, year, edition, pages
Elsevier, 2022. Vol. 436, article id 129220
Keywords [en]
TG-FTIR, Py-GC/MS, Base catalysis, Kinetics, Limonene, Isoprene
National Category
Vehicle Engineering Control Engineering
Research subject
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-90847DOI: 10.1016/j.jhazmat.2022.129220ISI: 000810939700004PubMedID: 35739742Scopus ID: 2-s2.0-85131396070OAI: oai:DiVA.org:ltu-90847DiVA, id: diva2:1663169
Note

Validerad;2022;Nivå 2;2022-06-21 (hanlid);

Funders: National Natural Science Foundation of Distinguished Young Scholars (41925031), Taishan Scholar Foundation of Young Expert (tsqn201812028), National Natural Science Foundation of China (41521003), the Qingdao Science and Technology Bureau (18-6-1-101-nsh, 16-6-2-51- nsh)

Available from: 2022-06-02 Created: 2022-06-02 Last updated: 2022-07-04Bibliographically approved

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Xu, Fanfan

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