NEW RESEARCH ARTICLE. PRETREATMENT EFFECT ON THE THERMAL DEGRADATION OF A FEEDSTOCK WITH LOW HEMICELLULOSE CONTENT: BRAZILIAN GINSENG

Pyrolysis is a well-known process for biomass upgrading, and a great deal of works are available about it. However, they focus on conventional lignocellulosic samples, and the information about any other less common samples, while still valuable, is very difficult to find. For instance, Brazilian ginseng (Pfaffia glomerata) is a feedstock without hemicellulose and a […]

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New method to connect Aspen Plus with Ansys Fluent CFD simulations

Traditional CFD simulations have been limited by the calculation of thermodynamic properties for uncommon compounds or non-ideal operating conditions. A method of integration of Aspen Plus®, a commercial process engineering simulator, and Ansys Fluent®, a CFD simulator, has been developed. The method of integration is based in the intercommunication of both programs using Matlab® and […]

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[Paper] The use of modelling to understand the mechanism of hydrogen peroxide direct synthesis from batch, semibatch and continuous reactor points of view

Hydrogen peroxide direct synthesis was experimentally studied in three different reactors, namely the batch, semibatch and trickle bed reactors (TBR), using a new promising catalyst based on Pd/K2621. Excellent results were obtained from the experimental point of view, achieving high H2O2 selectivities, around 90% for a short contact time in the batch reactor, 60% in […]

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[Thesis] On the Development of Computational Tools for the Modeling and Simulation of SCWO Process Intensified by Hydrothermal Flames.

ChemEng. João Queiroz defends his doctoral thesis “On the Development of Computational Tools for the Modeling and Simulation of SCWO Process Intensified by Hydrothermal Flames” on Tuesday, July 29th 2014 at 11:30h, at Valladolid University “Aula Triste, Palacio de Santa Cruz” Hydrothermal flames used as internal heat source contribute to overcome many of the challenges present in supercritical water […]

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CFD Modelling for Hydrothermal Manufacturing of Nanomaterials

Nanomaterials could be manufactured through different ways, and there are two different production routes: dry and wet methods. Within wet nanomanufacturing methods, two technologies are employed: sol-gel and hydrothermal synthesis. The latter one offers unique opportunities for the synthesis of high quality nanoparticles and their formulation, but one of the main disadvantages is the scale-up […]

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CFD Modelling – Development of computational tools for modeling the behavior of supercritical water oxidation reactions working under hydrothermal flame regime

      Supercritical water oxidation (SCWO) is an useful technology for the destruction of waste. In presence of hydrothermal flames (yes, a flame in aqueous media!) complete oxidation of organics is achieved in less than 1 s. The properties of water above its critical point (374◦4 C, 22.1 MPa) make possible the destruction of […]

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SHYMAN Project reaches the midpoint. Hydrothermal synthesis of nanoparticles is for real -news-

Nanoparticles are changing the way we conceive materials, boosting novel applications by tailored design of properties. ShyMan Project (ca. 6 million euro) is developing hydrothermal technology in supercritical water by a combination of the expertise of universities (Nottingham, Valladolid, etc) and companies (Solvay, REPSOL, PPG, etc.). Valladolid university is the second biggest partner with a […]

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