Hydrolysis of Cellulose in Supercritical Water: Reagent Concentration as a Selective Factor

Biomass is mainly composed by cellulose, hemicellulose and lignin. These components can be separated and then used as starting materials to produce interesting compounds via thermo-chemical processes such as hydrolysis. In the recent years there is an increasing interest in using supercritical water (SCW) as hydrolysis medium due to its suitability as environmentally friendly, non-toxic […]

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One-pot synthesis of catalysts by supercritical fluid deposition for biomass valorization

Supercritical fluid deposition (SFD) is an alternative technique, one-pot process, to obtain nanostructured materials. These materials have been attracting increased attention for a wide variety of applications due to their superior properties compared to their bulk counterparts, but the traditional synthesis methods to insert transition metals into mesoporous frameworks, generally by wet impregnation or co-precipitation, […]

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[Paper] Hydrothermal fractionation of grape seeds in subcritical water to produce oil extract, sugars and lignin: biorefinery example

In the present work, the fractionation of grape seeds was studied using solvothermal extraction and a hydrothermal fractionation-hydrolysis process focused in the production of added value components. The grape seeds were hydrothermally treated using a multi-step two-solvent and temperature profile fractionation in order to separate the added value components from hemicelluloses, celluloses and lignin in […]

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Supercritical Water Oxidation (SCWO) with hydrothermal flame sustained by disaccharides without using co-fuel

The High Pressure Process Group of the University of Valladolid has recently proved that hydrothermal flames can be sustained by supercritical water oxidation of disaccharides, thus opening the possibility of processing different waste effluent containing sugars or biopolymers using this technology. Using the Cooled Wall Reactor with a hydrothermal flame inside, developed by the High […]

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[Job Position] Postdoctoral Research Position opened – 24 months

In transfer of knowledge in process and products development on Extraction and formulation intensification processes for natural actives of wine. The position is funded by the European Commission under the Marie Curie Industrial and Academia Partnership and Pathway (IAPP) PIAP-GA-2013-612208, project WineSense. Deadline:   April 7th, 2014 – EURAXESS: http://ec.europa.eu/euraxess/index.cfm/jobs/jobDetails/33909687 – OPEUVA: http://funge.uva.es/area-innovacion/winesense/ – HPP: […]

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[Thesis] Enhanced extraction of natural substances using microwave energy

Process intensification is proposed using microwave and ultrasound energy in order to improve organic material liberation from natural cells (wastewater sludge, microalgae and grape marc). Enhanced process kinetics are achieved after a short pre-treatment stage up to the boiling temperature, followed by the conventional procedure. The novel technologies are compared to conventional thermal treatment in […]

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