Explanipedia

The origin, composition, and applications of industrial humins – a review Open

E. de Jong, Mark Mascal, Sandra Constant, Tom Claessen, Pierluigi Tosi , et al. · 2025

Humins are side-products derived from the acid-catalysed conversion of carbohydrate-containing biomass, including sugars ( e.g. glucose, fructose, sucrose), oligo-, polysaccharides, and lignocellulosic feedstocks into HMF, furfural and lev…

Molecular structure and composition elucidation of an industrial humin and its fractions Open

Sandra Constant, Christopher S. Lancefield, Willem Vogelzang, Rajeesh Kumar Pazhavelikkakath Purushothaman, Augustinus E. Frissen , et al. · 2024

The structure of humins, a major side-product of carbohydrate biorefining, is complex and to a large extent unknown. A multitechnique characterization of an industrial humin provides new structural insights.

Linkage Abundance and Molecular Weight Characteristics of Technical Lignins by Attenuated Total Reflection‐FTIR Spectroscopy Combined with Multivariate Analysis Open

Christopher S. Lancefield, Sandra Constant, Peter de Peinder, Pieter C. A. Bruijnincx · 2019

Invited for this month′s cover is the group of Pieter Bruijnincx at Utrecht University. The image shows how lignin structure information, essential to guide its valorization, can be rapidly obtained from simple IR spectroscopy combined wit…

Linkage Abundance and Molecular Weight Characteristics of Technical Lignins by Attenuated Total Reflection‐FTIR Spectroscopy Combined with Multivariate Analysis Open

Christopher S. Lancefield, Sandra Constant, Peter de Peinder, Pieter C. A. Bruijnincx · 2019

Lignin is an attractive material for the production of renewable chemicals, materials and energy. However, utilization is hampered by its highly complex and variable chemical structure, which requires an extensive suite of analytical instr…

Quantification and Classification of Carbonyls in Industrial Humins and Lignins by <sup>19</sup>F NMR Open

Sandra Constant, Christopher S. Lancefield, Bert M. Weckhuysen, Pieter C. A. Bruijnincx · 2016

Lignin and humins are both (by-)products of biorefining processes aimed at the valorization of lignocellulosic biomass. In order to improve the efficiency of such biorefineries and to develop new valorization pathways for these polymeric m…

Tandem Catalytic Depolymerization of Lignin by Water‐Tolerant Lewis Acids and Rhodium Complexes Open

Robin Jastrzebski, Sandra Constant, Christopher S. Lancefield, Nicholas J. Westwood, Bert M. Weckhuysen , et al. · 2016

Lignin is an attractive renewable feedstock for aromatic bulk and fine chemicals production, provided that suitable depolymerization procedures are developed. Here, we describe a tandem catalysis strategy for ether linkage cleavage within …

Composition, texture and methane potential of cellulosic residues from Lewis acids organosolv pulping of wheat straw Open

Sandra Constant, Abdellatif Barakat, Mike Robitzer, Francesco Di Renzo, Claire Dumas , et al. · 2016

New insights into the structure and composition of technical lignins: a comparative characterisation study Open

Sandra Constant, Hans Wienk, Augustinus E. Frissen, Peter de Peinder, Rolf Boelens , et al. · 2016

Multitechnique characterization of six technical lignins including nuclear magnetic resonance and size exclusion chromatography studies.

Lewis-acid catalysed organosolv lignin extraction from wheat straw Open

Charlie Basset, Sandra Constant, Mike Robitzer, Claire Dumas, Abdellatif Barakat , et al. · 2015

Lewis-acid catalysed organosolv lignin extraction from wheat straw . 3. International Conference catalysis for renewable sources: fuel, energy, chemicals

Reactive organosolv lignin extraction from wheat straw: Influence of Lewis acid catalysts on structural and chemical properties of lignins Open

Sandra Constant, Charlie Basset, Claire Dumas, Francesco Di Renzo, Mike Robitzer , et al. · 2015

Sandra Constant YOU? Author Swipe