Journal article 70 views
Thermo-catalytic depolymerization of lignin over Pd-based catalysts: Role of catalyst support on monoaromatics selectivity
José R. Colina,
Maray Ortega,
Jose Norambuena-Contreras 
,
Stef Ghysels ,
Frederik Ronsse,
Luis E. Arteaga-Pérez
,
Stef Ghysels ,
Frederik Ronsse,
Luis E. Arteaga-Pérez
Biomass and Bioenergy, Volume: 193, Start page: 107547
Swansea University Author:
Jose Norambuena-Contreras
Full text not available from this repository: check for access using links below.
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...
| Published in: | Biomass and Bioenergy |
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| ISSN: | 0961-9534 |
| Published: |
Elsevier BV
2025
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa68524 |
| 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 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. |
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| College: |
Faculty of Science and Engineering |
| Funders: |
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. |
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107547 |