A5027339476- Biofuel production and bioconversion
- Lignin and Wood Chemistry
- Catalysis for Biomass Conversion
- Enzyme-mediated dye degradation
- Microbial Metabolic Engineering and Bioproduction
- Advanced Cellulose Research Studies
- biodegradable polymer synthesis and properties
- Bioeconomy and Sustainability Development
- Biochemical and biochemical processes
- Phase Equilibria and Thermodynamics
- Sustainable Industrial Ecology
- Catalysis and Oxidation Reactions
- Forest Biomass Utilization and Management
- Environmental Impact and Sustainability
- Bioenergy crop production and management
- Dyeing and Modifying Textile Fibers
- Algal biology and biofuel production
- Process Optimization and Integration
- Mesoporous Materials and Catalysis
- Catalysis and Hydrodesulfurization Studies
- Viral Infectious Diseases and Gene Expression in Insects
- Natural Fiber Reinforced Composites
Fraunhofer Center for Chemical-Biotechnological Processes
2012-2022
Fraunhofer Institute for Interfacial Engineering and Biotechnology
2019-2020
Fraunhofer Institute for Chemical Technology
2008-2009
Abstract This paper reports the results of supercritical carbon dioxide (scCO 2 ) extraction β-carotene from Dunaliella salina as potential alternative to conventional organic solvent extraction. In pilot-scale scCO experiments, pressure, temperature, and co-solvent concentration were varied. The at 500 bar, 70 °C, 10 wt% ethanol yielded in highly efficient pigment recovery over 90%. Techno-economic assessment demonstrated higher energy consumption for that was compensated by lower costs....
Objective of this study was the investigation on up-scaling base-catalyzed depolymerization (BCD) lignin to pilot plant dimension. The cleavage process carried out in dilute alkaline solution at temperatures up 340°C and a pressure 25 MPa continuously operated tubular flow reactor with throughputs 20 kg/h. Investigations included proof feasibility scale-up as well parameter hardwood Organosolv softwood Kraft within established plant. Yields molecular compositions isolated product fractions...
The extraction and characterization of defined carboxyl-rich oligomeric lignin fragments with narrow molecular weight distribution is presented herein. With regard to the well-known pulp bleaching process, oxidative depolymerization was investigated using hydrogen peroxide in an aqueous alkaline solution (i.e., at T = 318 K, t 1 h) subsequent selective fractionation a 10/90 (v/v) acetone/water mixture. While average (MW) comparison starting material reduced by 82% after oxidation (T h,...
Abstract The aim of this study was the experimental demonstration and assessment a novel lignocellulose biorefinery (LCB) for integration beech wood-based products as platform fine chemicals. process sequence included organosolv pulping followed by pulp bleaching, hydrothermal conversion hemicellulose to xylose its purification, fermentation malic acid, base-catalyzed lignin depolymerization (BCD). resulting were dissolving pulp, phenolic BCD-oligomers, acid. state art these technologies is...
Abstract Die heterogen katalysierte Dehydratisierung von nachwachsenden C 5 ‐Rohstoffen zu Furfural mit Wasser als einzigem Lösungsmittel wird beschrieben. kann fossile Verbindungen im großen Maßstab für Polymere, Lösungsmittel, Feinchemikalien und Treibstoffe ablösen. Zur Erreichung dieses Ziels wurden kommerzielle Katalysatoren untersucht neue synthetisiert. Besonderheit des Prozesses Gegensatz aktuellen Arbeiten liegt Verzicht auf überkritische Fluide, organische Phasenhilfsmittel...
Abstract Die vorliegende Arbeit beschreibt die Anwendung eines modifizierten Organosolv‐Verfahrens zum Aufschluss von Fichtenrinde. Ziel war Optimierung des Aufschlusses und der Hydrolyse Hemicellulosen Maximierung Ausbeute an wasserunlöslichem Tannin. Versuche wurden in zwei verschiedenen Batch‐Autoklaven (100 mL, 13 L) im Temperaturbereich 120–180 °C bei Verweilzeiten zwischen 30 90 min durchgeführt. Weiterhin wurde Einfluss Verhältnisses Aufschlussmittel zu Biomasse Zusammensetzung...
Abstract Nachwachsende Rohstoffe werden derzeit insbesondere zur Erzeugung von Energie eingesetzt. Durch die Entwicklung innovativer Technologien sollen nachwachsende in Zukunft auch für Herstellung speziellen Materialien, Feinchemikalien oder chemischer Vorprodukte Anwendung finden. Für beide Anwendungsgebiete und ist Steigerung der Rohstoffeffizienz besonderer Bedeutung. Im Rahmen dieser Arbeit wurde Aufbereitung nachwachsenden Rohstoffen am Beispiel Holz durch verschiedene Trocken‐...
Lignocellulosic biomass offer great potential as a sustainable source for the utilization to chemicals. In particular, lignin is predestined due its aromatic structure. order make it accessible, lignified plant material must be pretreated and fractionated before can used in macromolecular form applications or after selective deploymerisation smaller phenolic building blocks (monomers oligomers) substitution of fossil based aromatics take place. This procedure allows maximum use all wood...
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