Koen W. Bossers
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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: 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: Correlated x-ray fluorescence and ptychographic nano-tomography on Rembrandt’s <i>The Night Watch</i> reveals unknown lead “layer”
Correlated x-ray fluorescence and ptychographic nano-tomography on Rembrandt’s <i>The Night Watch</i> reveals unknown lead “layer” Open
The Night Watch , one of the most famous masterpieces by Rembrandt, is the subject of a large research and conservation project. For the conservation treatment, it is of great importance to understand its current condition. Correlated nano…
View article: Sunlight Powered Continuous Flow Reverse Water Gas Shift Process Using a Plasmonic Au/TiO<sub>2</sub> Nanocatalyst
Sunlight Powered Continuous Flow Reverse Water Gas Shift Process Using a Plasmonic Au/TiO<sub>2</sub> Nanocatalyst Open
The continuous flow reverse water gas shift (rWGS) process was efficiently catalyzed by a plasmonic Au/TiO 2 nanocatalyst using sunlight as sole and sustainable energy source. The influence of the catalyst bed thickness on the CO productio…
View article: Continuous-Flow Sunlight-Powered CO2 Methanation Catalyzed by γ-Al2O3-Supported Plasmonic Ru Nanorods
Continuous-Flow Sunlight-Powered CO2 Methanation Catalyzed by γ-Al2O3-Supported Plasmonic Ru Nanorods Open
Plasmonic CO2 methanation using γ-Al2O3-supported Ru nanorods was carried out under continuous-flow conditions without conventional heating, using mildly concentrated sunlight as the sole and sustainable energy source (AM 1.5, irradiance 5…
View article: On the Fragmentation Behavior of Ziegler-Type Catalysts During the Early Stages of α-Olefin Polymerization
On the Fragmentation Behavior of Ziegler-Type Catalysts During the Early Stages of α-Olefin Polymerization Open
In this PhD Thesis the fragmentation behavior of Ziegler-type polyolefin catalysts was studied using advanced chemical imaging techniques. The fragmentation behavior plays a crucial part during the polymerization of a-olefins such as ethyl…
View article: Heterogeneity in the Fragmentation of Ziegler Catalyst Particles during Ethylene Polymerization Quantified by X-ray Nanotomography
Heterogeneity in the Fragmentation of Ziegler Catalyst Particles during Ethylene Polymerization Quantified by X-ray Nanotomography Open
Ziegler-type catalysts are the grand old workhorse of the polyolefin industry, yet their hierarchically complex nature complicates polymerization activity-catalyst structure relationships. In this work, the degree of catalyst framework fra…
View article: Visualizing defects and pore connectivity within metal–organic frameworks by X-ray transmission tomography
Visualizing defects and pore connectivity within metal–organic frameworks by X-ray transmission tomography Open
TXM-tomography unraveled large macropore defects within a MIL-47(V) MOF crystal. These pores do not seem to be well connected and they show a preferential orientation.
View article: Influence of Metal‐Alkyls on Early‐Stage Ethylene Polymerization over a Cr/SiO<sub>2</sub> Phillips Catalyst: A Bulk Characterization and X‐ray Chemical Imaging Study
Influence of Metal‐Alkyls on Early‐Stage Ethylene Polymerization over a Cr/SiO<sub>2</sub> Phillips Catalyst: A Bulk Characterization and X‐ray Chemical Imaging Study Open
The Cr/SiO 2 Phillips catalyst has taken a central role in ethylene polymerization since its invention in 1953. The uniqueness of this catalyst is related to its ability to produce broad molecular weight distribution (MWD) PE materials as …
View article: Correlated X-ray Ptychography and Fluorescence Nano-Tomography on the Fragmentation Behavior of an Individual Catalyst Particle during the Early Stages of Olefin Polymerization
Correlated X-ray Ptychography and Fluorescence Nano-Tomography on the Fragmentation Behavior of an Individual Catalyst Particle during the Early Stages of Olefin Polymerization Open
A combination of X-ray ptychography and X-ray fluorescence tomography (XRF) has been used to study the fragmentation behavior of an individual Ziegler-Natta catalyst particle, ∼40 μm in diameter, in the early stages of propylene polymeriza…
View article: Capturing the Genesis of an Active Fischer–Tropsch Synthesis Catalyst with Operando X‐ray Nanospectroscopy
Capturing the Genesis of an Active Fischer–Tropsch Synthesis Catalyst with Operando X‐ray Nanospectroscopy Open
A state‐of‐the‐art operando spectroscopic technique is applied to Co/TiO 2 catalysts, which account for nearly half of the world's transportation fuels produced by Fischer–Tropsch catalysis. This allows determination of, at a spatial resol…
View article: Developing Novel HTM Thin Films for Hybrid Perovskite Photovoltaics
Developing Novel HTM Thin Films for Hybrid Perovskite Photovoltaics Open
With an increase of global energy consumption, utilizing sustainable energy sources such as solar energy has attracted significant research interest. Solar energy can be converted into electrical energy using photovoltaic cells. Silicon ph…