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Your search keyword '"Hendriks, Frank C."' showing total 4 results
Start Over Author "Hendriks, Frank C." Topic heterogeneous catalysis
4 results on '"Hendriks, Frank C."'

1. Integrated Transmission Electron and Single-Molecule Fluorescence Microscopy Correlates Reactivity with Ultrastructure in a Single Catalyst Particle

Author

Hendriks, Frank C., Mohammadian, Sajjad, Ristanovic, Zoran, Kalirai, Samanbir, Meirer, Florian, Vogt, Eelco T. C., Bruijnincx, Pieter C. A., Gerritsen, Hans, Weckhuysen, Bert M., Sub Inorganic Chemistry and Catalysis, Sub Molecular Biophysics, Inorganic Chemistry and Catalysis, Sub Inorganic Chemistry and Catalysis, Sub Molecular Biophysics, and Inorganic Chemistry and Catalysis

Subjects
Materials science, zeolites, 010402 general chemistry, 01 natural sciences, Catalysis, Nanomaterials, Microscopy, single-molecule microscopy, Reactivity (chemistry), Zeolite, Heterogeneous Catalysis | Very Important Paper, electron microscopy, 010405 organic chemistry, Communication, General Medicine, General Chemistry, Single-molecule experiment, Communications, 0104 chemical sciences, Amorphous solid, Crystallography, heterogeneous catalysis, Chemical engineering, Transmission electron microscopy, Particle, structure–activity relationships
Abstract

Establishing structure–activity relationships in complex, hierarchically structured nanomaterials, such as fluid catalytic cracking (FCC) catalysts, requires characterization with complementary, correlated analysis techniques. An integrated setup has been developed to perform transmission electron microscopy (TEM) and single‐molecule fluorescence (SMF) microscopy on such nanostructured samples. Correlated structure–reactivity information was obtained for 100 nm thin, microtomed sections of a single FCC catalyst particle using this novel SMF‐TEM high‐resolution combination. High reactivity in a thiophene oligomerization probe reaction correlated well with TEM‐derived zeolite locations, while matrix components, such as clay and amorphous binder material, were found not to display activity. Differences in fluorescence intensity were also observed within and between distinct zeolite aggregate domains, indicating that not all zeolite domains are equally active.

Published
2017
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2. Integrated Transmission Electron and Single-Molecule Fluorescence Microscopy Correlates Reactivity with Ultrastructure in a Single Catalyst Particle.

Author

Hendriks, Frank C., Mohammadian, Sajjad, Ristanović, Zoran, Kalirai, Sam, Meirer, Florian, Vogt, Eelco T. C., Bruijnincx, Pieter C. A., Gerritsen, Hans C., and Weckhuysen, Bert M.

Subjects
CATALYSTS, TRANSMISSION electron microscopy, OPTICS, ULTRASTRUCTURE (Biology), FLUORESCENCE microscopy
Abstract

Establishing structure-activity relationships in complex, hierarchically structured nanomaterials, such as fluid catalytic cracking (FCC) catalysts, requires characterization with complementary, correlated analysis techniques. An integrated setup has been developed to perform transmission electron microscopy (TEM) and single-molecule fluorescence (SMF) microscopy on such nanostructured samples. Correlated structure-reactivity information was obtained for 100 nm thin, microtomed sections of a single FCC catalyst particle using this novel SMF-TEM high-resolution combination. High reactivity in a thiophene oligomerization probe reaction correlated well with TEM-derived zeolite locations, while matrix components, such as clay and amorphous binder material, were found not to display activity. Differences in fluorescence intensity were also observed within and between distinct zeolite aggregate domains, indicating that not all zeolite domains are equally active. [ABSTRACT FROM AUTHOR]

Published
2018
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3. High-Resolution Single-Molecule Fluorescence Imaging of Zeolite Aggregates within Real-Life Fluid Catalytic Cracking Particles.

Author

Ristanović, Zoran, Kerssens, Marleen M., Kubarev, Alexey V., Hendriks, Frank C., Dedecker, Peter, Hofkens, Johan, Roeffaers, Maarten B. J., and Weckhuysen, Bert M.

Subjects
HETEROGENEOUS catalysis, ZEOLITE catalysts, CONFOCAL fluorescence microscopy, OLIGOMERIZATION, STEREOSELECTIVE reactions, HIGH resolution imaging, ACID catalysts
Abstract

Fluid catalytic cracking (FCC) is a major process in oil refineries to produce gasoline and base chemicals from crude oil fractions. The spatial distribution and acidity of zeolite aggregates embedded within the 50-150 μm-sized FCC spheres heavily influence their catalytic performance. Single-molecule fluorescence-based imaging methods, namely nanometer accuracy by stochastic chemical reactions (NASCA) and super-resolution optical fluctuation imaging (SOFI) were used to study the catalytic activity of sub-micrometer zeolite ZSM-5 domains within real-life FCC catalyst particles. The formation of fluorescent product molecules taking place at Brønsted acid sites was monitored with single turnover sensitivity and high spatiotemporal resolution, providing detailed insight in dispersion and catalytic activity of zeolite ZSM-5 aggregates. The results point towards substantial differences in turnover frequencies between the zeolite aggregates, revealing significant intraparticle heterogeneities in Brønsted reactivity. [ABSTRACT FROM AUTHOR]

Published
2015
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