Search Results - "BERGWERFF, Jaap A"

Influence of the preparation method on the hydrotreating activity of MoS2/Al2O3 extrudates : A Raman microspectroscopy study on the genesis of the active phase by BERGWERFF, Jaap A, JANSEN, Marcel, LELIVELD, Bob G, VISSER, Tom, DE JONG, Krijn P, WECKHUYSEN, Bert M

“…Raman microspectroscopy was used to study the preparation of industrial MoS2/Al2O3 extrudates. Using this technique, the influence of the impregnation solution…”
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Envisaging the Physicochemical Processes during the Preparation of Supported Catalysts:  Raman Microscopy on the Impregnation of Mo onto Al2O3 Extrudates by Bergwerff, Jaap A, Visser, Tom, Leliveld, G, Rossenaar, Brenda D, de Jong, Krijn P, Weckhuysen, Bert M

“…Raman microscopy has been applied to study the preparation of shaped Mo/Al2O3 catalysts. The speciation of different Mo complexes over γ-Al2O3 support bodies…”
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Tomographic Energy Dispersive Diffraction Imaging as a Tool To Profile in Three Dimensions the Distribution and Composition of Metal Oxide Species in Catalyst Bodies by Beale, Andrew M, Jacques, Simon D.M, Bergwerff, Jaap A, Barnes, Paul, Weckhuysen, Bert M

“…Catalyst extrudate in 3D: Through the use of tomographic energy dispersive diffraction imaging it is possible to obtain detailed three‐dimensional insight into…”
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Monitoring Transport Phenomena of Paramagnetic Metal-Ion Complexes Inside Catalyst Bodies with Magnetic Resonance Imaging by Bergwerff, Jaap A., Lysova, Anna A., Espinosa-Alonso, Leticia, Koptyug, Igor V., Weckhuysen, Bert M.

“…An indirect magnetic resonance imaging (MRI) method has been developed to determine in a noninvasive manner the distribution of paramagnetic Co2+ complexes…”
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Probing the Transport of Paramagnetic Complexes inside Catalyst Bodies in a Quantitative Manner by Magnetic Resonance Imaging by Bergwerff, Jaap A., Lysova, Anna A., Espinosa Alonso, Leticia, Koptyug, Igor V., Weckhuysen, Bert M.

“…Have a look inside: A magnetic resonance imaging (MRI) procedure allows the distribution of paramagnetic metal‐ion complexes inside catalyst bodies to be…”
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Hydroprocessing catalyst deactivation in commercial practice by Vogelaar, Bas M., Eijsbouts, Sonja, Bergwerff, Jaap A., Heiszwolf, Johan J.

“…Hydroprocessing catalysts are susceptible to deactivation by several mechanisms, e.g. coke formation, metals deposition and active phase sintering, in their…”
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Catalytic activity in individual cracking catalyst particles imaged throughout different life stages by selective staining by Buurmans, Inge L. C., Ruiz-Martínez, Javier, Knowles, William V., van der Beek, David, Bergwerff, Jaap A., Vogt, Eelco T. C., Weckhuysen, Bert M.

“…Fluid catalytic cracking (FCC) is the major conversion process used in oil refineries to produce valuable hydrocarbons from crude oil fractions. Because the…”
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On the interaction between Co-and Mo-complexes in impregnation solutions used for the preparation of Al2O3-supported HDS catalysts : A combined Raman/UV-vis-NIR spectroscopy study by BERGWERFF, Jaap A, VISSER, Tom, WECKHUYSEN, Bert M

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Electron Tomography Reveals the Active Phase–Support Interaction in Sulfidic Hydroprocessing Catalysts by Eijsbouts, Sonja, Li, Xuanqi, Juan-Alcaniz, Jana, van den Oetelaar, Leon C. A, Bergwerff, Jaap A, Loos, Joachim, Carlsson, Anna, Vogt, Eelco T. C

“…Conventional two-dimensional (2D) transmission electron microscopy of sulfidic hydroprocessing catalysts can be deceiving and give the impression that parts of…”
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Microspectroscopic insight into the deactivation process of individual cracking catalyst particles with basic sulfur components by Ruiz-Martínez, Javier, Buurmans, Inge L.C., Knowles, William V., van der Beek, David, Bergwerff, Jaap A., Vogt, Eelco T.C., Weckhuysen, Bert M.

“…[Display omitted] ► Basic sulfur poisons interact with Brønsted acid sites forming oligomeric carbocations. ► Oligomeric carbocations are coke intermediates. ►…”
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Spatially resolved UV–vis microspectroscopy on the preparation of alumina-supported Co Fischer–Tropsch catalysts: Linking activity to Co distribution and speciation by van de Water, Leon G.A., Bezemer, G. Leendert, Bergwerff, Jaap A., Versluijs-Helder, Marjan, Weckhuysen, Bert M., de Jong, Krijn P.

“…The preparation steps of Co/ γ-Al 2O 3 Fischer–Tropsch (FT) catalysts have been studied using spatially resolved UV–vis microspectroscopy. The speciation of…”
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Magnetic resonance imaging as an emerging tool for studying the preparation of supported catalysts by Lysova, Anna A., Bergwerff, Jaap A., Espinosa-Alonso, Leticia, Weckhuysen, Bert M., Koptyug, Igor V.

“…Several magnetic resonance imaging (MRI) approaches are presented that can be used to study transport processes of various components of an impregnation…”
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Staining of Fluid-Catalytic-Cracking Catalysts: Localising Brønsted Acidity within a Single Catalyst Particle by Buurmans, Inge L. C., Ruiz-Martínez, Javier, van Leeuwen, Sanne L., van der Beek, David, Bergwerff, Jaap A., Knowles, William V., Vogt, Eelco T. C., Weckhuysen, Bert M.

“…A time‐resolved in situ micro‐spectroscopic approach has been used to investigate the Brønsted acidic properties of fluid‐catalytic‐cracking (FCC) catalysts at…”
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Noninvasive In Situ Visualization of Supported Catalyst Preparations Using Multinuclear Magnetic Resonance Imaging by Lysova, Anna A, Koptyug, Igor V, Sagdeev, Renad Z, Parmon, Valentin N, Bergwerff, Jaap A, Weckhuysen, Bert M

“…Multinuclear magnetic resonance imaging (MRI) is employed as a new noninvasive tool for monitoring supported catalyst preparation by visualizing precursor…”
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UV−Vis Microspectroscopy:  Probing the Initial Stages of Supported Metal Oxide Catalyst Preparation by van de Water, Leon G. A, Bergwerff, Jaap A, Nijhuis, T. Alexander, de Jong, Krijn P, Weckhuysen, Bert M

“…A UV−vis microspectroscopy methodology for monitoring the speciation and macrodistribution of catalyst−precursor species inside catalyst−support bodies at the…”
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Cover Picture: Staining of Fluid-Catalytic-Cracking Catalysts: Localising Brønsted Acidity within a Single Catalyst Particle (Chem. Eur. J. 4/2012) by Buurmans, Inge L. C., Ruiz-Martínez, Javier, van Leeuwen, Sanne L., van der Beek, David, Bergwerff, Jaap A., Knowles, William V., Vogt, Eelco T. C., Weckhuysen, Bert M.

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Insights into the Preparation of Supported Catalysts:  A Spatially Resolved Raman and UV−Vis Spectroscopic Study into the Drying Process of CoMo/γ-Al2O3 Catalyst Bodies by van de Water, Leon G. A, Bergwerff, Jaap A, Leliveld, (R.) G, Weckhuysen, Bert M, de Jong, Krijn P

“…Spatially resolved Raman and UV−vis−NIR microspectroscopy have been used as tools to study the preparation process of supported catalyst bodies. Detailed…”
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Tomographic Energy Dispersive Diffraction Imaging as a Tool To Profile in Three Dimensions the Distribution and Composition of Metal Oxide Species in Catalyst Bodies by Beale, Andrew M., Jacques, Simon D. M., Bergwerff, Jaap A., Barnes, Paul, Weckhuysen, Bert M.

“…3D‐Karten von Katalysatoren: Die tomographische Bildgebung durch energiedispersive Beugung liefert Informationen über die dreidimensionale Metalloxidverteilung…”
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Luminescence of nanocrystalline ZnS:Cu2 by BOL, Ageeth A, FERWERDA, Joke, BERGWERFF, Jaap A, MEIJERINK, Andries

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Microspectroscopic insight into the deactivation process of individual cracking catalyst particles with basic sulfur components by RUIZ-MARTINEZ, Javier, BUURMANS, Inge L. C, KNOWLES, William V, DER BEEK, David Van, BERGWERFF, Jaap A, VOGT, Eelco T. C, WECKHUYSEN, Bert M

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