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Thermo-catalytic depolymerization of lignin over Pd-based catalysts: Role of catalyst support on monoaromatics selectivity

José R. Colina, Maray Ortega, Jose Norambuena-Contreras Orcid Logo, Stef Ghysels Orcid Logo, Frederik Ronsse, Luis E. Arteaga-Pérez Orcid Logo

Biomass and Bioenergy, Volume: 193, Start page: 107547

Swansea University Author: Jose Norambuena-Contreras Orcid Logo

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DOI (Published version): 10.1016/j.biombioe.2024.107547

Abstract

The condensed structure of technical lignin presents significant challenges in converting it into valuable functionalized building blocks, such as single-ring aromatics. In this study, we explored how palladium-based catalysts influence the selectivity of monoaromatics during the fast pyrolysis depo...

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Published in: Biomass and Bioenergy
ISSN: 0961-9534
Published: Elsevier BV 2025
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URI: https://cronfa.swan.ac.uk/Record/cronfa68524
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spelling 2025-01-30T15:07:54.2579840 v2 68524 2024-12-11 Thermo-catalytic depolymerization of lignin over Pd-based catalysts: Role of catalyst support on monoaromatics selectivity 73c6854ebb10465fbf7faab297135641 0000-0001-8327-2236 Jose Norambuena-Contreras Jose Norambuena-Contreras true false 2024-12-11 ACEM The condensed structure of technical lignin presents significant challenges in converting it into valuable functionalized building blocks, such as single-ring aromatics. In this study, we explored how palladium-based catalysts influence the selectivity of monoaromatics during the fast pyrolysis depolymerization of lignin. A systematic study on the influence of the pyrolysis temperature (500 < T < 700 °C) and catalyst support nature (SiO2, Al2O3 and Carbon) was carried out by analytical pyrolysis. Creosol and guaiacol were the predominant species after non-catalytic and Pd/SiO2 catalyzed pyrolysis of Kraft lignin. However, when Pd/C and Pd/Al2O3 were applied, the selectivity to monoaromatics increased drastically, to 50.9 % and 34.4 %, respectively. The catalytic activity of Pd/C and Pd/Al2O3 was ascribed to the presence of medium and weak acid sites in the supports, which provides active sites for phenolics adsorption and deoxygenation. Additionally, metallic Pd sites activated the C-O and H2 bonds to further assist deoxygenation reactions, thus inducing a bifunctionality to these materials. This study offers valuable insights into the bifunctional effects of supported catalyst during the thermo-catalytic depolymerization of lignin. Journal Article Biomass and Bioenergy 193 107547 Elsevier BV 0961-9534 Depolymerization; Fast pyrolysis; Kraft lignin; Monoaromatics; Catalysts 1 2 2025 2025-02-01 10.1016/j.biombioe.2024.107547 COLLEGE NANME Aerospace, Civil, Electrical, and Mechanical Engineering COLLEGE CODE ACEM Swansea University National Research and Development Agency (ANID) through the Research Projects FONDECYT Postdoctoral Grant 3230605, FONDECYT Regular Grant 1240054, FONDEQUIP 170077, Johnson Matthey for providing PdCl2 through the PGM award program. 2025-01-30T15:07:54.2579840 2024-12-11T09:47:52.9767024 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering José R. Colina 1 Maray Ortega 2 Jose Norambuena-Contreras 0000-0001-8327-2236 3 Stef Ghysels 0000-0002-6957-725x 4 Frederik Ronsse 5 Luis E. Arteaga-Pérez 0000-0003-3982-4165 6 68524__33106__e890fde5701244c6a2ff41b25732fa0a.pdf 68524.pdf 2024-12-11T09:51:09.2163230 Output 2140987 application/pdf Accepted Manuscript true Author accepted manuscript document released under the terms of a Creative Commons CC-BY licence using the Swansea University Research Publications Policy (rights retention). true eng https://creativecommons.org/licenses/by/4.0/deed.en
title Thermo-catalytic depolymerization of lignin over Pd-based catalysts: Role of catalyst support on monoaromatics selectivity
spellingShingle Thermo-catalytic depolymerization of lignin over Pd-based catalysts: Role of catalyst support on monoaromatics selectivity
Jose Norambuena-Contreras
title_short Thermo-catalytic depolymerization of lignin over Pd-based catalysts: Role of catalyst support on monoaromatics selectivity
title_full Thermo-catalytic depolymerization of lignin over Pd-based catalysts: Role of catalyst support on monoaromatics selectivity
title_fullStr Thermo-catalytic depolymerization of lignin over Pd-based catalysts: Role of catalyst support on monoaromatics selectivity
title_full_unstemmed Thermo-catalytic depolymerization of lignin over Pd-based catalysts: Role of catalyst support on monoaromatics selectivity
title_sort Thermo-catalytic depolymerization of lignin over Pd-based catalysts: Role of catalyst support on monoaromatics selectivity
author_id_str_mv 73c6854ebb10465fbf7faab297135641
author_id_fullname_str_mv 73c6854ebb10465fbf7faab297135641_***_Jose Norambuena-Contreras
author Jose Norambuena-Contreras
author2 José R. Colina
Maray Ortega
Jose Norambuena-Contreras
Stef Ghysels
Frederik Ronsse
Luis E. Arteaga-Pérez
format Journal article
container_title Biomass and Bioenergy
container_volume 193
container_start_page 107547
publishDate 2025
institution Swansea University
issn 0961-9534
doi_str_mv 10.1016/j.biombioe.2024.107547
publisher Elsevier BV
college_str Faculty of Science and Engineering
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hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering
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description The condensed structure of technical lignin presents significant challenges in converting it into valuable functionalized building blocks, such as single-ring aromatics. In this study, we explored how palladium-based catalysts influence the selectivity of monoaromatics during the fast pyrolysis depolymerization of lignin. A systematic study on the influence of the pyrolysis temperature (500 < T < 700 °C) and catalyst support nature (SiO2, Al2O3 and Carbon) was carried out by analytical pyrolysis. Creosol and guaiacol were the predominant species after non-catalytic and Pd/SiO2 catalyzed pyrolysis of Kraft lignin. However, when Pd/C and Pd/Al2O3 were applied, the selectivity to monoaromatics increased drastically, to 50.9 % and 34.4 %, respectively. The catalytic activity of Pd/C and Pd/Al2O3 was ascribed to the presence of medium and weak acid sites in the supports, which provides active sites for phenolics adsorption and deoxygenation. Additionally, metallic Pd sites activated the C-O and H2 bonds to further assist deoxygenation reactions, thus inducing a bifunctionality to these materials. This study offers valuable insights into the bifunctional effects of supported catalyst during the thermo-catalytic depolymerization of lignin.
published_date 2025-02-01T12:16:28Z
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