A5002134274- Zeolite Catalysis and Synthesis
- Mesoporous Materials and Catalysis
- Catalysis and Oxidation Reactions
- Catalytic Processes in Materials Science
- Electron and X-Ray Spectroscopy Techniques
- X-ray Diffraction in Crystallography
- Advanced Electron Microscopy Techniques and Applications
- Chemical Synthesis and Characterization
- Advanced X-ray Imaging Techniques
- Crystal Structures and Properties
- Advanced Materials Characterization Techniques
- Advanced NMR Techniques and Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Catalysis and Hydrodesulfurization Studies
Utrecht University
2010-2014
Zero to Three
2011
The present status of in-situ scanning transmission X-ray microscopy (STXM) is reviewed, with an emphasis on the abilities STXM technique in comparison electron microscopy. experimental aspects and interpretation absorption spectroscopy (XAS) are briefly introduced boundary conditions that determine potential applications for XAS studies discussed. Nanoscale chemical imaging catalysts under working outlined using cobalt iron Fischer-Tropsch as showcases. In discussion, we critically compare...
Abstract A combination of atomic force microscopy (AFM), high‐resolution scanning electron (HR‐SEM), focused‐ion‐beam (FIB‐SEM), X‐ray photoelectron spectroscopy (XPS), confocal fluorescence (CFM), and UV/Vis synchrotron‐based IR microspectroscopy was used to investigate the dealumination processes zeolite ZSM‐5 at individual crystal level. It shown that steaming has a significant impact on porosity, acidity, reactivity materials. The catalytic performance, tested by styrene oligomerization...
Break on through: Steaming-induced mesopores of individual ZSM-5 crystals were studied by a combination focused ion beam (FIB) and scanning electron microscopy (SEM) tomography (see picture). In this manner, quantitative insight into the width, length, morphology, distribution generated within zeolite has been obtained. Detailed facts importance to specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available...
Zeolites in the spotlight: A combination of scanning transmission X-ray microscopy (see picture) and bulk methods give nanoscale chemical insight distribution Al C within ZSM-5 zeolites during methanol-to-olefin reactions. The distinct catalyst performances could be related to differences spatial hydrocarbons. Detailed facts importance specialist readers are published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted by...
Abstract A variety of phosphated zeolite H‐ZSM‐5 samples are investigated by using a combination Fourier transfer infrared (FTIR) spectroscopy, single pulse 27 Al, 29 Si, 31 P, 1 H‐ P cross polarization (CP), Al‐ CP, and Al 3Q magic angle spinning nuclear magnetic resonance (MAS NMR) scanning transmission X‐ray microscopy (STXM) N 2 physisorption. This approach leads to insights into the physicochemical processes that take place during phosphatation. Direct phosphatation promotes...
Abstract The effect of a severe steaming treatment on the physicochemical properties and catalytic performance H‐SAPO‐34 molecular sieves during methanol‐to‐hydrocarbons (MTH) reaction has been investigated with combination scanning transmission X‐ray microscopy (STXM), testing, bulk characterization techniques, including ammonia temperature programmed desorption 27 Al 29 Si magic angle spinning nuclear magnetic resonance. For this purpose, two samples, namely calcined steamed catalyst...
Which side are you on? Scanning transmission X-ray microscopy is used for the first time to elucidate coordination and distribution of aluminum in industrial-relevant zeolites at single-particle level. Extended regions a few hundred nanometers, rich higher environments, heterogeneously embedded within zeolite particle, before after steaming post-treatment.
Abstract The catalytic, deactivation, and regeneration characteristics of large coffin‐shaped H‐ZSM‐5 crystals were investigated during the methanol‐to‐hydrocarbons (MTH) reaction at 350 500 °C. Online gas‐phase effluent analysis examination retained material thereof used to explore bulk properties zeolite in a fixed‐bed reactor introduce them as model catalysts for MTH reaction. These findings related observations made individual particle level by using polarization‐dependent UV‐visible...
Confocal fluorescence microscopy has been used in combination with bulky non-reactive dyes (i.e. proflavine, stilbene and nile blue A) two staining reactions fluorescein synthesis 4-fluorostyrene oligomerisation) to study the effect of steaming on pore accessibility acidity large ZSM-5 zeolite crystals. This approach enabled 3-D visualization cracks mesopores connected outer surface as well mesoporous "cavities" within steamed It found that besides generation mesoporosity makes boundaries...
Zeolithe im Rampenlicht: Eine Kombination aus Rasterröntgenmikroskopie (siehe Bild) und Bulk-Methoden liefert Einblicke in die nanoskopische Verteilung von Al C ZSM-5-Zeolithen während der Reformierung Methanol zu Olefinen. Die verschiedenen Katalysatorleistungen konnten mit Unterschieden räumlichen Kohlenwasserstoffe Verbindung gebracht werden. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents peer-reviewed, but not copy-edited or...
The Brønsted acid-catalyzed oligomerization of 4-fluorostyrene has been studied on a series H-ZSM-5 zeolite powders, steamed under different conditions, with combination UV-Vis micro-spectroscopy and Scanning Transmission X-ray Microscopy (STXM). STXM have used to monitor the relative formation cyclic linear dimeric carbocations as function steaming post-treatment (i.e., parent vs. at 600, 700 800 °C). It was found that band intensity ratios species increase from 0.79 (parent H-ZSM-5) over...
Porentief erforscht: Die durch Dampfbehandlung eingeführten Mesoporen in einzelnen ZSM-5-Kristallen wurden mit einer Kombination aus fokussierten Ionenstrahlen (FIB) und Rasterelektronenmikroskopie (SEM) tomographiert (siehe Bild). Dabei quantitative Einblicke die Breite, Länge, Morphologie Verteilung der erhalten. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents peer-reviewed, but not copy-edited or typeset. They made available...
Abstract Review: 74 refs.