Ni-Mo2C/y-Al2O3 catalysts for syngas production in pyrolysis-dry reforming of plastics - the effect of amine nature on catalyst performance

Pawelczyk, Ewelina; Frackiewicz, Izabela; Gil Bravo, Antonio; Karczewski, Jakub; Maciejewski, Michał E.; Dymerski, Tomasz; Gebicki, Jacek

Ni-Mo2C/y-Al2O3 catalysts for syngas production in pyrolysis-dry reforming of plastics - the effect of amine nature on catalyst performance

dc.contributor.author	Pawelczyk, Ewelina
dc.contributor.author	Frackiewicz, Izabela
dc.contributor.author	Gil Bravo, Antonio
dc.contributor.author	Karczewski, Jakub
dc.contributor.author	Maciejewski, Michał E.
dc.contributor.author	Dymerski, Tomasz
dc.contributor.author	Gebicki, Jacek
dc.contributor.department	Ciencias	es_ES
dc.contributor.department	Zientziak	eu
dc.contributor.department	Institute for Advanced Materials and Mathematics - INAMAT2	en
dc.date.accessioned	2025-06-02T08:23:44Z
dc.date.available	2025-06-02T08:23:44Z
dc.date.issued	2025-05-29
dc.date.updated	2025-06-02T07:40:39Z
dc.description.abstract	Pyrolysis combined with dry reforming (PCDR) is eco-friendly technology for plastic waste management, allowing for sustainable production of syngas. Design of suitable catalysts with high performance and stability is crucial for its industrialization. In this work, Ni-Mo2C/γ-Al2O3 catalysts were synthesized using organic–inorganic precursors. Three types of amines (hexylamine – aliphatic linear, cyclohexylamine – aliphatic cyclic, aniline – aromatic) were used as carbon source in the precursor preparation to investigate their effect on catalyst physicochemical properties and its catalytic performance. Catalytic performance of the obtained catalysts was examined in PCDR of model waste plastic mixture. It was revealed that catalytic activity of catalysts prepared with aliphatic amines was higher compared to aromatic aniline, amine commonly used for carbide synthesis. The differences in catalyst properties, which affected their catalytic activity were characterized using N2-adsorption at −196 °C, XRD, H2-TPR, SEM, TG/DTG and CO2-adsorption methods. A correlation was observed between amine molecule complexity and Mo2C crystallite size, significantly affecting hydrogen generation. The less complex the amine, the smaller the crystallite and the increased hydrogen production. Moreover, the use of aliphatic amines resulted in the stronger Ni-support interactions, the increased number of more favorable, larger mesopores as well as the presence of the metallic Mo phase and the lack of unbound carbon in contrast to the catalyst obtained using aniline. The catalyst synthesized using hexylamine increased H2 yield by more than tenfold, syngas yield by more than threefold, and the H2/CO ratio by fivefold, which offers an opportunity for future industrialization of PCDR.	en
dc.description.sponsorship	The financial support for this study from Gdańsk University of Technology by the DEC-23/2020/IDUB/I.3.3 grant under the ARGENTUM—“Excellence Initiative—Research University” program is gratefully acknowledged.
dc.format.mimetype	application/pdf	en
dc.format.mimetype	application/msword	en
dc.identifier.citation	Pawelczyk, E., Frackiewicz, I., Gil, A., Karczewski. J., Maciejewski, M. E., Dymerski, T., Gebicki, J. (2025). Ni-Mo2C/y-Al2O3 catalysts for syngas production in pyrolysis-dry reforming of plastics - the effect of amine nature on catalyst performance. Chemical Engineering Journal, 516, 1-15. https://doi.org/10.1016/j.cej.2025.164181.
dc.identifier.doi	10.1016/j.cej.2025.164181
dc.identifier.issn	1385-8947
dc.identifier.uri	https://academica-e.unavarra.es/handle/2454/54191
dc.language.iso	eng
dc.publisher	Elsevier
dc.relation.ispartof	Chemical Engineering Journal (2025), vol. 516, 164181
dc.relation.publisherversion	https://doi.org/10.1016/j.cej.2025.164181
dc.rights	© 2025 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license.
dc.rights.accessRights	info:eu-repo/semantics/openAccess
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject	Dry reforming	en
dc.subject	Molybdenum carbide	en
dc.subject	Catalytic syngas production	en
dc.subject	Hydrogen	en
dc.subject	CO2	en
dc.subject	Waste management	en
dc.title	Ni-Mo2C/y-Al2O3 catalysts for syngas production in pyrolysis-dry reforming of plastics - the effect of amine nature on catalyst performance	en
dc.type	info:eu-repo/semantics/article
dc.type.version	info:eu-repo/semantics/publishedVersion
dspace.entity.type	Publication
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