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Selection and use of manganese dioxide by Neanderthals

Heyes, P.J. (author), Anastasakis, K. (author), De Jong, W. (author), Van Hoesel, A. (author), Roebroeks, W. (author), Soressi, M. (author)

Several Mousterian sites in France have yielded large numbers of small black blocs. The usual interpretation is that these ‘manganese oxides’ were collected for their colouring properties and used in body decoration, potentially for symbolic expression. Neanderthals habitually used fire and if they needed black material for decoration, soot and...

journal article 2016

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Method and apparatus for furfural production

Marcotullio, G. (author), De Jong, W. (author)

The invention concerns a process for the production of furfural from pentoses and/or water soluble pentosans, comprising the steps of feeding an aqueous pentose solution containing one or more pentoses or soluble pentosans to the bottom of a reaction column to produce an aqueous liquid upflow; heating the bottom part of the column using a heat...

patent 2015

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Electronic Origins of Anomalous Twin Boundary Energies in Hexagonal Close Packed Transition Metals

De Jong, M. (author), Kacher, J. (author), Sluiter, M.H.F. (author), Qi, L. (author), Olmsted, D.L. (author), Van de Walle, A. (author), Morris, J.W. (author), Minor, A.M. (author), Asta, M. (author)

Density-functional-theory calculations of twin-boundary energies in hexagonal close packed metals reveal anomalously low values for elemental Tc and Re, which can be lowered further by alloying with solutes that reduce the electron per atom ratio. The anomalous behavior is linked to atomic geometries in the interface similar to those observed in...

journal article 2015

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Charting the complete elastic properties of inorganic crystalline compounds

De Jong, M. (author), Chen, W. (author), Angsten, T. (author), Jain, A. (author), Notestine, R. (author), Gamst, A. (author), Sluiter, M.H.F. (author), Krishna Ande, C. (author), Van der Zwaag, S. (author), Plata, J.J. (author), Toher, C. (author), Curtarolo, S. (author), Ceder, G. (author), Persson, K.A. (author), Asta, M. (author)

journal article 2015

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The effects of combined catalysis of oxalic acid and seawater on the kinetics of xylose and arabinose dehydration to furfural

Hongsiri, W. (author), Danon, B. (author), De Jong, W. (author)

It is known that both acids and salts have a positive catalytic effect on the dehydration of pentoses to form furfural, a potentially attractive platform chemical. In this study the effects of the combined usage of an organic acid, instead of stronger mineral acids, and a saline catalyst is investigated. In order to assess these effects, the...

journal article 2014

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Attempts on cardoon gasification in two different circulating fluidized beds

Christodoulou, C. (author), Tsekos, C. (author), Tsalidis, G.A. (author), Fantini, M. (author), Panopoulos, K.D. (author), De Jong, W. (author), Kakaras, E. (author)

Few tests have been carried out in order to evaluate the use of cardoon in gasification and combustion applications most of the researchers dealt with agglomeration problems. The aim of this work is to deal with the agglomeration problem and to present a solution for the utilization of this biofuel at a near industrial application scale. For...

journal article 2014

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Increased physical activity severely induces osteoarthritic changes in knee joints with papain induced sulfate-glycosaminoglycan depleted cartilage

Siebelt, M. (author), Groen, H.C. (author), Koelewijn, S.J. (author), De Blois, E. (author), Sandker, M. (author), Waarsing, J.H. (author), Müller, C. (author), Van Osch, G.J.V.M. (author), De Jong, M. (author), Weinans, H.H. (author)

Introduction Articular cartilage needs sulfated-glycosaminoglycans (sGAGs) to withstand high pressures while mechanically loaded. Chondrocyte sGAG synthesis is regulated by exposure to compressive forces. Moderate physical exercise is known to improve cartilage sGAG content and might protect against osteoarthritis (OA). This study investigated...

journal article 2014

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Supercritical Water Gasification of Biomass: A Literature and Technology Overview

Yakaboylu, O. (author), Harinck, J. (author), Smit, K.G. (author), De Jong, W. (author)

The supercritical water gasification process is an alternative to both conventional gasification as well as anaerobic digestion as it does not require drying and the process takes place at much shorter residence times; a few minutes at most. The drastic changes in the thermo-physical properties of water from the liquid state to the supercritical...

journal article 2014

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Mechanistic and kinetic aspects of pentose dehydration towards furfural in aqueous media employing homogeneous catalysis

Danon, B. (author), Marcotullio, G. (author), De Jong, W. (author)

In this paper both the mechanistic and kinetic aspects of furfural formation from pentoses in aqueous acidic media have been reviewed. Based on the reviewed literature, a comprehensive reaction mechanism has been proposed consisting of more than one route, all starting from acyclic xylose, and involving alternately 1,2-enolization, ?-elimination...

journal article 2013

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Process for the production of furfural from pentoses and/or water soluble pentosans

De Jong, W. (author), Marcotullio, G. (author)

The invention is directed to a process for the production of furfural from pentoses and/or water soluble pentosans, said process comprising converting the said pentoses and/or water soluble pentosans in aqueous solution in a first step to furfural and in a second step feeding the aqueous solution containing furfural obtained in the first step to...

patent 2012

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Tar formation in a steam-O2 blown CFB gasifier and a steam blown PBFB gasifier (BabyHPR): Comparison between different on-line measurement techniques and the off-line SPA sampling and analysis method

Meng, X. (author), Mitsakis, P. (author), Mayerhofen, M. (author), De Jong, W. (author), Gaderer, M. (author), Verkooijen, A.H.M. (author), Spliethoff, H. (author)

Two on-line tar measurement campaigns were carried out using an atmospheric pressure 100 “”kWth steam-O2 blown circulating fluidized bed (CFB) gasifier at the Delft University of Technology (TUD) and a 30–40kWth steam blown pressurized bubbling fluidized bed (PBFB) gasifier BabyHPR (Heatpipe Reformer) at the Technical University Munich (TUM)....

journal article 2012

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Process for the treatment of lignocellulosic biomass

De Jong, W. (author), Tavares Cardoso, M.A. (author), Van Spronsen, J. (author), Witkamp, G.J. (author)

The invention is directed to a process for the treatment of lignocellulosic biomass to recover one or more components or derivatives of components thereof, said process comprising treating said biomass at a temperature of at least 75 DEG C in a mixture of an ionic liquid and an organic acid, thereby producing a treatment mixture containing...

patent 2011

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Seakeeping Behaviour of High Speed Ships: An Experimental and Numerical Study

De Jong, P. (author)

In recent years, great progress has been made in both the optimisation of the seakeeping behaviour of fast ships and the development of efficient numerical methods for computation of the seakeeping behaviour of ships in general. The study presented in the thesis aims to integrate both developments. First, the key aspects of the seakeeping...

doctoral thesis 2011

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Fluidized Bed Gasification as a Mature And Reliable Technology for the Production of Bio-Syngas and Applied in the Production of Liquid Transportation Fuels: A Review

Siedlecki, M. (author), De Jong, W. (author), Verkooijen, A.H.M. (author)

Biomass is one of the renewable and potentially sustainable energy sources and has many possible applications varying from heat generation to the production of advanced secondary energy carriers. The latter option would allow mobile services like the transportation sector to reduce its dependency on the fossil fuel supply. This article reviews...

journal article 2011

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Full Scale Measurements on board of the Twin Axe Catamaran “Marenico Shamal”

De Jong, Pepijn (author), Keuning, Lex J.A. (author), Sterk, Frits (author)

report 2011

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Overview of biorefineries based on co-production of furfural, existing concepts and novel developments

De Jong, W. (author), Marcotullio, G. (author)

journal article 2010

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Study of the behaviour of a catalytic ceramic candle filter in a lab-scale unit at high temperatures

Simeone, E. (author), Hölsken, E. (author), Nacken, M. (author), Heidenreich, S. (author), De Jong, W. (author)

journal article 2010

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Bioenergy II: Furfural destruction kinetics during sulphuric acid-catalyzed production from biomass

Marcotullio, G. (author), De Jong, W. (author), Tavares Cardoso, M.A. (author), Verkooijen, A.H.M. (author)

journal article 2009

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A method and apparatus for analysing and sorting a flow of material

Dalmijn, W.L. (author), De Jong, T.P.R. (author)

The invention relates to a method and an apparatus for analysing a flow of material using X rays. The method comprises radiating the material with at least two energy levels and measuring the transmission of radiation through the material for each level separately, and is characterized in that a sensor is used for measuring the radiation...

patent 2002

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Problems with Laparoscopic Instruments: Opinions of Experts

Den Boer, K.T. (author), De Jong, T. (author), Dankelman, J. (author), Gouma, D.J. (author)

Introduction: Laparoscopic surgery is particularly known for its complex technique, which calls for operative analysis of laparoscopic instruments. This study investigates the opinion of experts about clinical problems with instruments occurring during laparoscopic surgery. Methods: A questionnaire was used to obtain the opinions of expert...

journal article 2001