Liquefaction of lignocellulosic biomass into phenolic monomers and dimers over multifunctional Pd/NbOPO4 catalyst

Ramakrishna Jogi, Ajaikumar Samikannu, Päivi Mäki-Arvela, Pasi Virtanen, Jarl Hemming, Annika Smeds, Chandrakant Mukesh, Torbjörn A. Lestander, Chunlin Xu and Jyri-Pekka Mikkola

Renewable Energy, 2024, vol. 233, issue C

Abstract: For the first time, a tandem catalytic material, 5 wt % Pd/NbOPO4, was utilized in the depolymerization of wood in supercritical ethanol under hydrogen atmosphere. The experiments were conducted under various conditions, with fresh, and acetone extracted birch. A comprehensive analysis was performed to elucidate the dissolution efficiency and achieved product distribution. The results indicated that with fresh birch, 34 wt % of lignin monomer yield with 84 wt % delignification efficiency were obtained while with extracted wood, 35 wt % of lignin monomer yield with 78 wt % delignification efficiency were achieved. The total lignin monomer content extracted from the fresh birch is composed of 76.9 wt % of dimethoxyphenols and 16.5 wt % with the guaiacol structure. Major lignin monomer product was homosyringaldehyde (61.9 wt %). With extracted wood, 93.2 wt % of dimethoxyphenols (63.6 wt % homosyringaldehyde) and 6.8 wt % of guaiacol-monomers were achieved. It was concluded that the depolymerization occurred via breaking of the ether bonds in lignin, including ether hydrolysis by Lewis acid sites over the solid acid catalyst and with subsequent deoxygenation of monophenols over Pd. In addition, an extraction process was proposed to extract the aromatic fraction from the obtained biocrude.

Keywords: Liquefaction; Wood biomass; Tandem catalyst; Bio-aromatics; Aromatic extraction; Deep eutectic solvents (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0960148124012163
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:233:y:2024:i:c:s0960148124012163

DOI: 10.1016/j.renene.2024.121148

Access Statistics for this article

Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides

More articles in Renewable Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().