| Title: |
Lignin stabilization and carbohydrate nature in H-transfer reductive catalytic fractionation: the role of solvent fractionation of lignin oil in structural profiling |
| Authors: |
Rinken, R; Posthuma, D; Rinaldi, R |
| Source: |
14 ; 1 |
| Publisher Information: |
Wiley-VCH Verlag |
| Publication Year: |
2022 |
| Collection: |
Imperial College London: Spiral |
| Subject Terms: |
Science & Technology; Physical Sciences; Chemistry; Multidisciplinary; Green & Sustainable Science & Technology; Science & Technology - Other Topics; biomass valorization; catalysis; fractionation; lignin-first; nickel; HYDROGEN-TRANSFER REACTIONS; SOLUBILITY PARAMETERS; LIGNOCELLULOSE FRACTIONATION; PHENOLIC-COMPOUNDS; KRAFT LIGNIN; DEPOLYMERIZATION; WOOD; ORGANOSOLV; BIOMASS; MODEL; General Chemistry |
| Description: |
Reductive Catalytic Fractionation (RCF) of lignocellulosic materials produces lignin oil rich in monomer products and high-quality cellulosic pulps. RCF lignin oil also contains lignin oligomers/polymers and hemicellulose-derived carbohydrates. The variety of components makes lignin oil a complex matrix for analytical methods. As a result, the signals are often convoluted and overlapped, making detecting and quantifying key intermediates challenging. Therefore, to investigate the mechanisms underlining lignin stabilization and elucidate the structural features of carbohydrates occurring in the RCF lignin oil, fractionation methods reducing the RCF lignin oil complexity are required. This report examines the solvent fractionation of RCF lignin oil as a facile method for producing lignin oil fractions for advanced characterization. Solvent fractionation uses small volumes of environmentally benign solvents (methanol, acetone, and ethyl acetate) to produce multigram lignin fractions comprising products in different molecular weight ranges. This feature allows the determination of structural heterogeneity across the entire molecular weight distribution of the RCF lignin oil by high-resolution HSQC NMR spectroscopy. This study provides detailed insight into the role of the hydrogenation catalyst (Raney Ni) in stabilizing lignin fragments and defining the structural features of hemicellulose-derived carbohydrates in lignin oil obtained by the H-transfer RCF process. 1 |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
ChemSusChem: chemistry and sustainability, energy and materials; http://hdl.handle.net/10044/1/101736 |
| DOI: |
10.1002/cssc.202201875 |
| Availability: |
http://hdl.handle.net/10044/1/101736; https://doi.org/10.1002/cssc.202201875 |
| Rights: |
© 2022 The Authors. ChemSusChem published by Wiley-VCH GmbH This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. ; http://creativecommons.org/licenses/by/4.0/ |
| Accession Number: |
edsbas.F945CFDD |
| Database: |
BASE |