Eelco T. C. Vogt
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View article: Process Monitoring of Lactone Ring Formation and Opening by Operando Attenuated Total Reflectance Infrared Spectroscopy
Process Monitoring of Lactone Ring Formation and Opening by Operando Attenuated Total Reflectance Infrared Spectroscopy Open
Inline monitoring of chemical processes using spectroscopy is a powerful approach to replace conventional sampling. Spectroscopic data can be used with regression models to determine the endpoint or the onset temperature of reactions and c…
View article: External acidity as performance descriptor in polyolefin cracking using zeolite-based materials
External acidity as performance descriptor in polyolefin cracking using zeolite-based materials Open
Thermal pyrolysis is gaining industrial adoption to convert large volumes of plastic waste into hydrocarbon feedstock. However, it suffers from a high reaction temperature and relatively low selectivity. Utilizing a catalyst in the process…
View article: Visualizing Composition and Functionality of Porous Catalysts Using Dual-Emissive Fluorescent Nanoprobes
Visualizing Composition and Functionality of Porous Catalysts Using Dual-Emissive Fluorescent Nanoprobes Open
The performance of heterogeneous catalyst bodies is closely related to the accessibility and properties of their catalytically most active regions. Visualizing and understanding the composition and functionality of these multicomponent hie…
View article: Catalytic Hydrodesulfurization of Thiophene, Dibenzothiophene and 4,6-Dimethyldibenzothiophene on a CoMoS Catalyst
Catalytic Hydrodesulfurization of Thiophene, Dibenzothiophene and 4,6-Dimethyldibenzothiophene on a CoMoS Catalyst Open
Previous studies have employed density functional theory (DFT) modeling to investigate hydrodesulfurization (HDS) pathways for heavy aromatic sulfides, typically focusing on hydrogenation to assist in C-S bond cleavage on both pristine and…
View article: In-Situ Thermometry Reveals Fragmentation Behavior Based on Local Temperature in α-Olefin Polymerization Catalysts
In-Situ Thermometry Reveals Fragmentation Behavior Based on Local Temperature in α-Olefin Polymerization Catalysts Open
Typical industrial olefin polymerization processes to produce both commodity and specialty polyolefin grades are mainly based on spherical, heterogeneous catalyst particles. During α-polymerization, heat from the exothermic reaction and pr…
View article: Chitosan microsphere-supported catalysts: design, synthesis and optimization for ethylene polymerization
Chitosan microsphere-supported catalysts: design, synthesis and optimization for ethylene polymerization Open
Chitosan, a biopolymer derived from waste, is shaped as a support to facilitate polymerization. Synthesis optimization was done by definitive screening design, while the generated catalysts were tested for polymerization and analyzed by sp…
View article: Correlating Heterogeneities in Support Fragmentation to Polymer Morphology in Metallocene‐Based Propylene Polymerization Catalysis
Correlating Heterogeneities in Support Fragmentation to Polymer Morphology in Metallocene‐Based Propylene Polymerization Catalysis Open
In the field of olefin polymerization catalysis, metallocenes are heterogenized with methylaluminoxane onto silica supports to yield active catalysts. During olefin polymerization, these silica supports act as a framework to control the fr…
View article: Da Vinci Project: Educating Sustainability Change-Makers with Transdisciplinary Challenge-Based Learning and Design Thinking
Da Vinci Project: Educating Sustainability Change-Makers with Transdisciplinary Challenge-Based Learning and Design Thinking Open
Sustainability transitions need professionals with specific skills and attitudes that students often do not develop in their regular chemistry education. To foster sustainability change-maker competencies, we suggest augmenting higher educ…
View article: The Coking of a Solid Catalyst Rationalized with Combined Raman and Fluorescence Lifetime Microscopy
The Coking of a Solid Catalyst Rationalized with Combined Raman and Fluorescence Lifetime Microscopy Open
The formation of carbon deposits is a major deactivation pathway for solid catalysts. Studying coking on industrially relevant catalysts is, however, often challenging due to the sample heterogeneity. That is especially true for zeolite‐co…
View article: The Coking of a Solid Catalyst Rationalized with Combined Raman and Fluorescence Lifetime Microscopy
The Coking of a Solid Catalyst Rationalized with Combined Raman and Fluorescence Lifetime Microscopy Open
The formation of carbon deposits is a major deactivation pathway for solid catalysts. Studying coking on industrially relevant catalysts is, however, often challenging due to the sample heterogeneity. That is especially true for zeolite‐co…
View article: γ-Stearolactone ring-opening by zeolites for the production of branched saturated fatty acids
γ-Stearolactone ring-opening by zeolites for the production of branched saturated fatty acids Open
Improvement in γ-stearolactone ring-opening activity of beta zeolites by a favourable change in Brønsted to Lewis acid site ratio, induced by steaming and acid leaching.
View article: Carbon Deposit Analysis in Catalyst Deactivation, Regeneration, and Rejuvenation
Carbon Deposit Analysis in Catalyst Deactivation, Regeneration, and Rejuvenation Open
Hydrocarbon conversion catalysts suffer from deactivation by deposition or formation of carbon deposits. Carbon deposit formation is thermodynamically favored above 350 °C, even in some hydrogen‐rich environments. We discuss four basic mec…
View article: Carbon Deposit Analysis in Catalyst Deactivation, Regeneration, and Rejuvenation
Carbon Deposit Analysis in Catalyst Deactivation, Regeneration, and Rejuvenation Open
Hydrocarbon conversion catalysts suffer from deactivation by deposition or formation of carbon deposits. Carbon deposit formation is thermodynamically favored above 350 °C, even in some hydrogen‐rich environments. We discuss four basic mec…
View article: Transport limitations in polyolefin cracking at the single catalyst particle level
Transport limitations in polyolefin cracking at the single catalyst particle level Open
Catalytic cracking could enable low temperature conversion of hard-to recycle polyolefin plastics. However, traditional cracking catalysts suffer from macro and microscopic mass transport limitations, which call for plastic pre-treatment.
View article: Structure Sensitivity of CO<sub>2</sub> Conversion over Nickel Metal Nanoparticles Explained by Micro-Kinetics Simulations
Structure Sensitivity of CO<sub>2</sub> Conversion over Nickel Metal Nanoparticles Explained by Micro-Kinetics Simulations Open
Nickel metal nanoparticles are intensively researched for the catalytic conversion of carbon dioxide. They are commercially explored in the so-called power-to-methane application in which renewably resourced H2 reacts with CO2 to produce C…
View article: Nano-scale insights regarding coke formation in zeolite SSZ-13 subject to the methanol-to-hydrocarbons reaction
Nano-scale insights regarding coke formation in zeolite SSZ-13 subject to the methanol-to-hydrocarbons reaction Open
A correlation between the micro- and nano-scale coking behavior of SSZ-13 was discovered with in situ / operando spectroscopy and atom probe tomography (APT), which allows for spatial reconstruction and analysis of relations between framew…
View article: 3‐D X‐ray Nanotomography Reveals Different Carbon Deposition Mechanisms in a Single Catalyst Particle
3‐D X‐ray Nanotomography Reveals Different Carbon Deposition Mechanisms in a Single Catalyst Particle Open
Catalyst deactivation involves a complex interplay of processes taking place at different length and time scales. Understanding this phenomenon is one of the grand challenges in solid catalyst characterization. A process contributing to de…
View article: Understanding the Activation of ZSM-5 by Phosphorus: Localizing Phosphate Groups in the Pores of Phosphate-Stabilized ZSM-5
Understanding the Activation of ZSM-5 by Phosphorus: Localizing Phosphate Groups in the Pores of Phosphate-Stabilized ZSM-5 Open
Fluid catalytic cracking (FCC) produces (the feedstock for) a major part of the world's fuels, as well as chemical building blocks for, for example, polymers, pharmaceuticals, and specialty materials. ZSM-5 is the active ingredient in prop…
View article: Role of Rare Earth Ions in the Prevention of Dealumination of Zeolite Y for Fluid Cracking Catalysts
Role of Rare Earth Ions in the Prevention of Dealumination of Zeolite Y for Fluid Cracking Catalysts Open
In this work, we use quantum-mechanical calculations to examine a number of possible dealumination routes in a model reminiscent of a commercial Y zeolite (Si/Al ratio of 3) as used in fluid catalytic cracking. First, we determine the dist…
View article: Role of Rare Earth Ions in the Prevention of Dealumination of Zeolite Y for Fluid Cracking Catalysts
Role of Rare Earth Ions in the Prevention of Dealumination of Zeolite Y for Fluid Cracking Catalysts Open
In this work, we use quantum-mechanical calculations to examine a number of possible dealumination routes in a model reminiscent of a commercial Y zeolite (Si/Al ratio of 3) as used in fluid catalytic cracking. First, we determine the dist…
View article: Nature of cobalt species during the <i>in situ</i> sulfurization of Co(Ni)Mo/Al<sub>2</sub>O<sub>3</sub> hydrodesulfurization catalysts
Nature of cobalt species during the <i>in situ</i> sulfurization of Co(Ni)Mo/Al<sub>2</sub>O<sub>3</sub> hydrodesulfurization catalysts Open
The evolution in local structure and electronic properties of cobalt was investigated during in situ sulfurization. Using a combination of 1 s X-ray absorption (XAS) and 1 s 3 p resonant inelastic X-ray scattering (RIXS), the valence, coor…
View article: <i>PDFgetN3</i>: atomic pair distribution functions from neutron powder diffraction data using <i>ad hoc</i> corrections
<i>PDFgetN3</i>: atomic pair distribution functions from neutron powder diffraction data using <i>ad hoc</i> corrections Open
PDFgetN3 , a new software tool for the extraction of pair distribution functions (PDFs) from neutron powder diffraction intensity data, is described. Its use is demonstrated with constant-wavelength neutron data measured at the new powder …
View article: Revealing long- and short-range structural modifications within phosphorus-treated HZSM-5 zeolites by atom probe tomography, nuclear magnetic resonance and powder X-ray diffraction
Revealing long- and short-range structural modifications within phosphorus-treated HZSM-5 zeolites by atom probe tomography, nuclear magnetic resonance and powder X-ray diffraction Open
Analysis of phosphate-stabilized H-ZSM-5 reveals the formation of new acid sites and the formation of Si–O–P bonds.
View article: Rücktitelbild: Integrated Transmission Electron and Single‐Molecule Fluorescence Microscopy Correlates Reactivity with Ultrastructure in a Single Catalyst Particle (Angew. Chem. 1/2018)
Rücktitelbild: Integrated Transmission Electron and Single‐Molecule Fluorescence Microscopy Correlates Reactivity with Ultrastructure in a Single Catalyst Particle (Angew. Chem. 1/2018) Open
Zwei “Superhelden” der hochauflösenden Bildgebung, ……nämlich die Einzelmolekülfluoreszenzmikroskopie und die Rasterelektronenmikroskopie, wurden kombiniert, um korrelierende Analysen durchführen zu können. In ihrer Zuschrift auf S. 263 ff.…
View article: Back Cover: Integrated Transmission Electron and Single‐Molecule Fluorescence Microscopy Correlates Reactivity with Ultrastructure in a Single Catalyst Particle (Angew. Chem. Int. Ed. 1/2018)
Back Cover: Integrated Transmission Electron and Single‐Molecule Fluorescence Microscopy Correlates Reactivity with Ultrastructure in a Single Catalyst Particle (Angew. Chem. Int. Ed. 1/2018) Open
Two “superheroes” in high-resolution chemical imaging, namely single-molecule fluorescence microscopy and transmission electron microscopy, have been combined in the same set-up to facilitate correlative analysis. In their Communication on…
View article: Integrated Transmission Electron and Single‐Molecule Fluorescence Microscopy Correlates Reactivity with Ultrastructure in a Single Catalyst Particle
Integrated Transmission Electron and Single‐Molecule Fluorescence Microscopy Correlates Reactivity with Ultrastructure in a Single Catalyst Particle Open
Establishing structure–activity relationships in complex, hierarchically structured nanomaterials, such as fluid catalytic cracking (FCC) catalysts, requires characterization with complementary, correlated analysis techniques. An integrate…
View article: Integrated Transmission Electron and Single‐Molecule Fluorescence Microscopy Correlates Reactivity with Ultrastructure in a Single Catalyst Particle
Integrated Transmission Electron and Single‐Molecule Fluorescence Microscopy Correlates Reactivity with Ultrastructure in a Single Catalyst Particle Open
Establishing structure–activity relationships in complex, hierarchically structured nanomaterials, such as fluid catalytic cracking (FCC) catalysts, requires characterization with complementary, correlated analysis techniques. An integrate…