A5084960651- Biofuel production and bioconversion
- Catalysis for Biomass Conversion
- Lignin and Wood Chemistry
- Microbial Metabolic Engineering and Bioproduction
- Advanced Cellulose Research Studies
- Biochemical and biochemical processes
- Enzyme-mediated dye degradation
- Economic Analysis and Policy
- Community Development and Social Impact
- Polymer composites and self-healing
- Crop Yield and Soil Fertility
- Taxation and Compliance Studies
- Asphalt Pavement Performance Evaluation
- Dutch Social and Cultural Studies
- Photopolymerization techniques and applications
- Bioeconomy and Sustainability Development
- Fermentation and Sensory Analysis
- Optimization and Packing Problems
- Biochemical Acid Research Studies
- Bioenergy crop production and management
- Scheduling and Optimization Algorithms
- Synthesis and Characterization of Heterocyclic Compounds
- Process Optimization and Integration
- Agriculture, Plant Science, Crop Management
- Molecular spectroscopy and chirality
Utrecht University
2022-2024
Netherlands Organisation for Applied Scientific Research
2008-2024
Energy Research Centre of the Netherlands
2011-2021
Eindhoven University of Technology
2020
Office of Energy Efficiency and Renewable Energy
2017
Nuclear Research and Consultancy Group
2017
Abstract The pulping industry could become a biorefinery if the lignin and hemicellulose components of lignocellulose are valorized. Conversion into well‐defined aromatic chemicals is still major challenge. Lignin depolymerization reactions often occur in parallel with irreversible condensation formed fragments. Here, we describe strategy that markedly suppresses undesired pathways allows to selectively transform few compounds. Notably, applying this woody biomass at organosolv conditions,...
Abstract BACKGROUND: Ethanol‐based organosolv fractionation of lignocellulosic biomass is an effective pretreatment technology for enzymatic cellulose hydrolysis to produce sugars and lignin within a biorefinery. This study focuses on the catalytic effect H 2 SO 4 , HCl, MgCl willow wood wheat straw. RESULTS: The use catalysts improved both feedstocks. maximum digestibility obtained was 87% (using 0.01 mol L −1 as catalyst) 99% straw (0.02 HCl). Non‐catalytic at identical conditions resulted...
Key features of this process are the high yield cellulose, monomeric hemicellulose sugars and lignin combined with limited solvent loss due to acetone self-condensation.
New biobased polyurethane (PU) coatings with high lignin content were developed and characterized in this work. These materials based on a α,ω-diisocyanate monomer (1,4-bis(4-isocyanato-2-methoxyphenoxy)butane, VA-NCO) obtained from lignin-derived vanillic acid its further cross-linking reaction three different nonchemically modified technical lignins pulping processes, namely, mild acetone organosolv, kraft, soda. After determining the optimal VA-NCO/lignin mass ratio for each type of...
Acetone organosolv fractionation of beech and birch wood at the lab-scale results in high sugar yields from (hemi)cellulose isolation a high-purity lignin. In this study, process is scaled up to validate technology pilot scale using industrial-size chips low liquid-to-solid ratios as next step toward commercialization. Translation pilot-scale showed similar performance compared processing with good conversion polymeric pentoses mostly monomeric sugars delignification. Continuous lignin...
Polyurethane (PU) coatings with high lignin content and tunable properties were made using a combination of fractionation partial catalytic depolymerization as novel strategy to tailor molar mass hydroxyl group reactivity, the key parameters for use in PU coatings. Acetone organosolv obtained from pilot-scale beech wood chips was processed at kilogram scale produce fractions specific ranges (Mw 1000–6000 g/mol) reduced polydispersity. Aliphatic groups distributed relatively evenly over...
Feedstock flexibility is highly advantageous for the viability of (solvent-based) biorefineries but comes with considerable challenge having to cope varying nature and typically high abundance nonlignocellulose compounds in most readily available residual biomass streams. Here, we demonstrate that mild aqueous acetone organosolv fractionation various complex lignocellulosic raw materials (roadside grass, wheat straw, birch branches, almond shells, a mixed stream thereof) indeed negatively...
Lignin partial depolymerization by reduction (PDR) was developed as a strategy to tailor technical lignin's molar mass and reduce its heterogeneity potentially increase the reactivity of lignin hydroxyl groups in polymer applications such PU foams coatings. The process aims cleave remaining β-O-4 linkages, thereby reducing large fragments overall dispersity. Acetone organosolv from pilot-scale fractionation industrial-size wood chips depolymerized using methanol, Ru/C catalyst, externally...
Abstract The solid acid‐catalyzed hydrolysis of cellulose was studied under elevated temperatures and autogenous pressures using in situ ATR‐IR spectroscopy. Standards pure reaction products, which include glucose, fructose, hydroxymethylfurfural (HMF), levulinic acid (LA), formic acid, other compounds, were measured water ambient temperatures. A combination spectroscopic HPLC analysis revealed that the proceeds first through disruption glycosidic linkages to form smaller molecules, are...
The influence of physicochemical cellulose parameters and purity on the heterogeneous hydrolytic hydrogenation (ligno)cellulose to hexitols.
Second generation bioethanol represents an important biofuel, but innovations on biomass pre-treatment and fermentation are needed to improve efficiency cost-effectiveness in its production. In this work, beech wood chips were treated using acetone-based organosolv fractionation process at pilot scale, resulting the isolation of lignin, a high-purity cellulosic pulp liquid stream containing hemicellulose sugars. The (C5 stream) contained xylose as major sugar also inhibitors such furanics,...
Aqueous acetone organosolv fractionation of the lignocellulosic biomass using a batchwise operation is robust technology option to produce cellulose, sugars, and lignin. Such typically characterized by fast solubilization most lignin hemicellulose sugars in early stages process, gradually followed slower removal remaining, more recalcitrant part at later stages. As result, solubilized experience relatively long residence time hot liquor, leading undesired sugar degradation...
Abstract Two organosolv lignins extracted during pilot runs of the Fabiola process were analyzed, fractionated and chemically modified with ethylene carbonate (EC) to produce building blocks suitable for polymer synthesis. Isolation low dispersity fractions relied on partial solubility in organic solvents. Lignins was first evaluated analyzed Hansen Kamlet‐Taft parameters, showing a good correlation solvents dipolarity/polarizability parameter π*. The results then used select sequence able...