A5045332643- Innovative Microfluidic and Catalytic Techniques Innovation
- Catalytic Processes in Materials Science
- Electrowetting and Microfluidic Technologies
- Microfluidic and Capillary Electrophoresis Applications
- Microfluidic and Bio-sensing Technologies
- Machine Learning in Materials Science
- Zeolite Catalysis and Synthesis
- Catalysts for Methane Reforming
- Hydrocarbon exploration and reservoir analysis
- Micro and Nano Robotics
- Electrostatics and Colloid Interactions
- Carbon dioxide utilization in catalysis
- Luminescence Properties of Advanced Materials
- Catalysis for Biomass Conversion
- Electrohydrodynamics and Fluid Dynamics
- Metal-Organic Frameworks: Synthesis and Applications
- Theoretical and Computational Physics
- thermodynamics and calorimetric analyses
- NMR spectroscopy and applications
- Perovskite Materials and Applications
- Nanomaterials and Printing Technologies
- Mineral Processing and Grinding
- Field-Flow Fractionation Techniques
- Supercapacitor Materials and Fabrication
- Pickering emulsions and particle stabilization
Utrecht University
2015-2023
Cancer Genomics Centre
2019
Bandshape luminescence thermometry during in situ temperature measurements has been reported by preparing three catalytically relevant systems, which show temperature-dependent luminescence. One of these systems was further investigated as a showcase for application. Microcrystalline NaYF4 doped with Er3+ and Yb3+ mixed commercial zeolite H-ZSM-5 to investigate the Methanol-to-Hydrocarbons (MTH) reaction, while monitoring reaction products online gas chromatography. Due exothermic nature MTH...
In this work we present 3 showcases that luminescence thermometry is a promising and versatile technique for temperature monitoring in various microfluidic devices.
Nickel metal nanoparticles are intensively researched for the catalytic conversion of carbon dioxide. They commercially explored in so-called power-to-methane application which renewably resourced H2 reacts with CO2 to produce CH4, is better known as Sabatier reaction. Previous work has shown that this reaction structure-sensitive. For instance, Ni/SiO2 catalysts reveal a maximum performance when nickel ∼2–3 nm used. Particularly important understanding structure sensitivity over...
CO2 hydrogenation was carried out over Pt-containing UiO-67 Zr-MOFs at T = 220–280 °C and ambient pressure, with H2/CO2 0.2–9 contact times, τ 0.004–0.01 gcat·min·mL–1. The catalysts were characterized by XRD, N2 adsorption, FESEM, TEM HRTEM, Pt L3-edge XANES EXAFS, dissolution-NMR, CO chemisorption, IR spectroscopy, TGA. A positive correlation observed between the degree of reduction conversion. Contact time variation experiments showed that is a primary product reaction, while CH4...
Luminescent nanoparticles have great potential for remote temperature sensing. Mapping of high profiles under harsh conditions that are common in chemical reactors requires new thermally and chemically stable (nano)probes. Here, we report dependent luminescence Yb3+/Er3+-, Dy3+- Eu3+-doped Y2O3 (NPs). We deposited these lanthanide-doped NPs on α-Al2O3, a non-porous catalyst support material. The strongly adsorbed the surface no sintering was observed upon heating to 900 K 12 h. thermal...
In this review article, we discuss the latest advances and future perspectives of microfluidics for micro/nanoscale catalyst particle synthesis analysis.
The use of microfluidics for analysis biological and chemical compounds is flourishing, with droplet being well suited high-throughput single substance analysis. Nowadays, many new experimental set-ups are reported that combine various fields expertise, including, among others, microfluidics, optics, electronics, chemistry, biology, etc. This work aims to highlight the engineering effort goes into development realization obtaining ‘good’ scientific data. High quality research results stand...
The particles of heterogeneous catalysts differ greatly in size, morphology, and most importantly, activity. Studying these catalyst batch typically results ensemble averages, without any information at the level individual particles. To date, study has been rewarding but is still rather slow often cumbersome1. Furthermore, valuable in-depth studies single particle lack statistical relevance. Here, we report development a droplet microreactor for high-throughput fluorescence-based...
Abstract Pickering emulsions (PEs), stabilized by solid particles, have shown to be a versatile tool for biphasic catalysis. Here, we report droplet microfluidic approach flow PE (FPE) catalysis, further expanding the possibilities catalysis beyond standard batch reactions. This microreactor allowed inline analysis of catalytic process with in situ Raman spectroscopy, as demonstrated acid‐catalyzed deacetalization benzaldehyde dimethyl acetal form benzaldehyde. Furthermore, use FPE system...
Abstract A better understanding of the deactivation processes taking place within solid catalysts is vital to design ones. However, since inter‐particle heterogeneities are more a rule than an exception, particle sorting crucial analyse single catalyst particles in detail. Microfluidics offers new possibilities sort at level. Herein, we report first‐of‐its‐kind 3D printed magnetophoretic chip able by their magnetic moment. Fluid catalytic cracking (FCC) were separated based on Fe content....
Abstract Glycerol is an attractive renewable building block for the synthesis of polyglycerols, which find application in cosmetic and pharmaceutical industries. The selective etherification glycerol to higher oligomers was studied presence CaO colloids data are compared with those obtained from NaOH CaO. materials were prepared by dispersing CaO, CaCO 3 , or Ca(OH) 2 onto a carbon nanofiber (CNF) support. Colloidal nanoparticles subsequently dispensed CNF into reaction mixture give that...
Abstract Fluid catalytic cracking (FCC) is an important process in oil refinery industry to produce gasoline and propylene. Due harsh reaction conditions, FCC catalysts are subject deactivation through for example, metal accumulation zeolite framework collapse. Here, we perform a screening of the influence poisons on acidity accessibility industrial catalyst material using laboratory‐based single particle characterization that is, μ‐XRF fluorescence microscopy combination with probe...
The single particle hydrogenation of methylene blue over a Pd/SiO<sub>2</sub> catalyst was monitored in droplet-microreactor, using red/green/blue optical microscopy.
Abstract Invited for the cover of this issue is group Bert M. Weckhuysen at Utrecht University. The image depicts an artistic impression catalyst particles in full color: by combining multiple characterization techniques per single Fluid Catalytic Cracking (FCC) particle, insights are provided into heterogeneity industrially used catalyst. Read text article 10.1002/chem.201905880 .
Artificially mimicking aging of an equilibrium catalyst (ECAT) is effective strategy to model the deactivation a Fluid Catalytic Cracking (FCC) during refinery operations. Herein, we have used correlative microscopy approach unravel inter-particle spatial heterogeneities in artificially deactivated catalysts (DCATs) and compared them with real-life ECAT containing on average 3800 ppm Ni 2300 V, set density separated fractions. By doing so could rationalize effect metal contaminants acidity...
We report the fabrication and characterization of a microfluidic droplet microreactor with potential use for single catalyst particle diagnostics. The aim is to capture Fluid Catalytic Cracking (FCC) particles in droplets perform probe reaction that results fluorescent output signal. intensity such signal can be used as measure catalytic activity particle. features generator, platinum (Pt) microheaters, Pt micro temperature sensors, able operate at pressures up least 5 bar. Fluidic channels...
Abstract A better understanding of the deactivation processes taking place within solid catalysts is vital to design ones. However, since inter‐particle heterogeneities are more a rule than an exception, particle sorting crucial analyse single catalyst particles in detail. Microfluidics offers new possibilities sort at level. Herein, we report first‐of‐its‐kind 3D printed magnetophoretic chip able by their magnetic moment. Fluid catalytic cracking (FCC) were separated based on Fe content....