Director
Office: TUHH campus, building L, room 3010
Email:
Tel: +49 40 42878 3801
Curriculum Vitae
Born on January 17th of 1987 in Bozen, Italy, Alexander Penn studied Technical Physics at Vienna University of Technology, Austria, and at Universidad Autónoma de Madrid during an Erasmus exchange semester. In 2013 he graduated and joined ETH Zurich for his doctoral studies. He received his PhD in early 2018 for his works in the field of time-efficient magnetic resonance imaging. Subsequently, he was a group leader at ETH Zurich and a visiting researcher at Columbia University, New York, and at Osaka University, Japan. In 2020 he joined Hamburg University of Technology (TUHH) where he founded the Institute of Process Imaging. Between 2020 and 2023 he served as local research coordinator for TUHH in the European Consortium of Innovative Universities (ECIU) and coordinated the International master’s program Chemical and Bioprocess Engineering at TUHH. Since 2023 he is the dean of the school of study of Process Engineering.
Research area
The work of Alexander Penn and his group is dedicated to understanding the complex transport and reaction processes that occur within chemical and bioprocess engineering systems. To this end, the group develops process imaging techniques mostly based on magnetic resonance that can quantify flow, temperature and chemical reactions within reactors with high temporal and spatial resolution. The research mission is to contribute to making our energy system and industrial production more sustainable, energy- and resource-efficient, and carbon-neutral.
Publications
2024
- Magnetic resonance imaging for 3D-printed structured packings - Conference Presentation
16th International Conference on Gas–Liquid and Gas–Liquid–Solid Reactor Engineering, GLS-16: (2024) - The TUHH process imaging system - Conference Poster not in Proceedings
16th International Bologna Conference Magnetic Resonance in Porous Media (MRPM 2024) - MRI in chemical engineering applications - Conference Presentation
IFIP TC7 System Modeling and Optimization (2024) - Magnetic resonance velocimetry of particle hydrodynamics in a three-dimensional draft tube spout-fluid bed - Journal Article
Chemical Engineering Journal 485: 149678 (2024-04-01)
Open Access | Publisher DOI - The effect of baffles on the hydrodynamics of a gas-solid fluidized bed studied using real-time magnetic resonance imaging - Journal Article
Powder Technology 432: 119114 (2024-01-02)
Open Access | Publisher DOI - Advancing SMART Reactors through NMR Relaxometry : Characterization of Stimuli-Responsive Lyogels - Conference Poster
16th International Bologna Conference Magnetic Resonance in Porous Media (MRPM 2024)
Open Access
2023
- Magnetic resonance imaging in granular flows: An overview of recent advances - Review Article
Particuology (in Press): (2023)
Publisher DOI - Computer simulation of magnetic resonance imaging of the flow of fluidized particles - Journal Article
Industrial and Engineering Chemistry Research 62 (29): 11677–11688 (2023-07-12)
Publisher DOI - Magnetic resonance imaging of fluidized beds with baffles - Conference Presentation
Quantitative NMR Methods for Reaction and Process Monitoring (NMRPM 2023) - Temperature distribution in a gas-solid fixed bed probed by rapid magnetic resonance imaging - Journal Article
Chemical Engineering Science 269: 118457 (2023-04-05)
Publisher DOI
2022
- The effect of baffles on fluidized bed hydrodynamics - A magnetic resonance imaging study - Conference Presentation
Annual Meeting on Reaction Engineering and ProcessNet Subject Division Heat and Mass Transfer (2022) - Quantifying wall effects in fluidized beds using real-time magnetic resonance imaging - Conference Poster not in Proceedings
Annual Meeting on Reaction Engineering and ProcessNet Subject Division Heat and Mass Transfer 2022 - A review on fast tomographic imaging techniques and their potential application in industrial process control - Journal Article
Sensors 22 (6): 2309 (2022)
Open Access | Publisher DOI
2021
- Stereo camera based in-situ monitoring of L-PBF process stability by spatter detection - Conference Paper
Advancing Precision in Additive Manufacturing (2021) - CFD-DEM study of bubble properties in a cylindrical fluidized bed of Geldart Group D particles and comparison with prior MRI data - Journal Article
Powder Technology 389: 75-84 (2021-09)
Publisher DOI - Mechanism of anomalous sinking of an intruder in a granular packing close to incipient fluidization - Journal Article
Physical Review Fluids 6 (6): 064305 (2021-06)
Publisher DOI
2020
- Link between packing morphology and the distribution of contact forces and stresses in packings of highly nonconvex particles - Journal Article
Physical Review E 6 (102): 062902 (2020-12-21)
Publisher DOI - Real-Time Magnetic Resonance Velocimetry and Thermometry of Gas-Solid Systems - Conference Paper
AIChE Annual Meeting (2020) - Combined Real-Time Magnetic Resonance Imaging and Numerical Simulation of Gas Bubble Splitting and Coalescence in Fluidized Beds - Conference Paper
AIChE Annual Meeting (2020) - Asynchronous bubble pinch-off pattern arising in fluidized beds due to jet interaction : a magnetic resonance imaging and computational modeling study - Journal Article
Physical Review Fluids 9 (5): 094303 (2020-09-25)
Open Access | Publisher DOI - Regimes of jetting and bubbling in a fluidized bed studied using real-time magnetic resonance imaging - Journal Article
Chemical Engineering Journal (383): 123185 (2020-03-01)
Publisher DOI - Magnetic resonance thermometry of gas‐solid systems - Journal Article
Chemie Ingenieur Technik 9 (92): 1180-1180 (2020)
Publisher DOI
2019
- Wake volume of injected bubbles in fluidized beds: A magnetic resonance imaging velocimetry study - Journal Article
Powder Technology (357): 428-435 (2019-12-01)
Publisher DOI - Characteristics of a single jet injected into an incipiently fluidized bed: A magnetic resonance imaging study - Journal Article
Advanced Powder Technology 12 (30): 3146-3152 (2019-12)
Publisher DOI - Magnetic resonance imaging of interaction and coalescence of two bubbles injected consecutively into an incipiently fluidized bed - Journal Article
Chemical Engineering Science (208): 115152 (2019-11-23)
Publisher DOI - Real-time imaging of granular dynamics - Conference Paper
International Conference on Magnetic Resonance Microscopy (ICMRM 2019) - Magnetic resonance imaging of single bubbles injected into incipiently fluidized beds - Journal Article
Chemical Engineering Science (200): 147-166 (2019-06-08)
Publisher DOI - Gravitational instabilities in binary granular materials - Journal Article
Proceedings of the National Academy of Sciences of the United States of America 19 (116): 9263-9268 (2019-05-07)
Publisher DOI - Real-time magnetic resonance imaging of fluidized beds with internals - Journal Article
Chemical Engineering Science (198): 117-123 (2019-04-28)
Publisher DOI - Anomalous collapse of interacting bubbles in a fluidized bed : a magnetic resonance imaging study - Journal Article
Physical Review Fluids 3 (4): 034303 (2019-03-18)
Open Access | Publisher DOI - Magnetic resonance imaging of the interaction of bubbles and jets injected into fluidized beds - Conference Paper
March Meeting of the American Physical Society (2019) - Effect of liquid bridging on bubbles injected into a fluidized bed: A magnetic resonance imaging study - Journal Article
Powder Technology (343): 813-820 (2019-02-01)
Publisher DOI - Fluidized Beds with Internals: A Real-Time Magnetic Resonance Imaging Study of Gas Bubbles and Particle Motion - Conference Paper
Fluidization XVI, Guilin, China (2019) - Rayleigh-Taylor Instability in Vibrated Gas-Fluidized Particles - Conference Paper
AIChE Annual Meeting (2019) - Homogeneous, High Packing Fraction Fluidization of Coarse Particles Using a Combination of Gas Flow and Vibration - Conference Paper
Fluidization XVI, Guilin, China (2019)
2018
- Magnetic resonance imaging of injected bubble and jet dynamics in fluidized beds - Conference Paper
AIChE Annual Meeting (2018) - Magnetic resonance imaging of gas–solid fluidization with liquid bridging - Journal Article
AIChE Journal 8 (64): 2958-2971 (2018-08)
Publisher DOI - Real-Time magnetic resonance imaging of bubble behavior and particle velocity in fluidized beds - Journal Article
Industrial and Engineering Chemistry Research 29 (57): 9674-9682 (2018-07-25)
Publisher DOI - A high-performance gradient insert for rapid and short-T₂ imaging at full duty cycle - Journal Article
Magnetic Resonance in Medicine 6 (79): 3256-3266 (2018-06)
Publisher DOI - Magnetic Resonance Imaging and Modeling of Liquid-Solid Fluidization - Conference Paper
World Congress on Particle Technology (2018) - Detection of Fluidization with Real-Time Magnetic Resonance Imaging - Conference Paper
8th World Congress on Particle Technology (2018) - Real-time magnetic resonance Imaging of granular dynamics - Doctoral Thesis
ETH Zürich: Diss. ETH No. 24619 (2018)
Publisher DOI - MRI of bubble and jet injection into fluidized beds - Conference Paper
NETL Workshop on Multiphase Flow Science (2018) - Real-time magnetic resonance imaging of gas-solid fluidization - Conference Paper
Jahrestreffen Reaktionstechnik, Würzburg, Germany (2018) - On the Mechanism of Anomalous Sphere Sinking in Apparently Fixed Particle Beds (Discrete Particle Simulation and Ultra-Fast MRI Measurement) - Conference Paper
World Congress on Particle Technology (2018) - MRI of Anomalous Flow upon Gas Injection into Fluidized Beds - Conference Poster not in Proceedings
Granular Matter Gordon Research Conference (2018) - Im Takt des Kernspins: Blitzschnelle Bilder aus den Inneren granularer Medien - Journal Article
GIT Labor-Fachzeitschrift 62 (9): (2018)
2017
- Real-time probing of granular dynamics with magnetic resonance - Journal Article
Science Advances 9 (3): e1701879 (2017-09)
Open Access | Publisher DOI - Magnetic Resonance Imaging of Wet Fluidization - Conference Paper
AIChE Annual Meeting (2017) - Real-time magnetic resonance imaging of granular flows - Conference Poster not in Proceedings
Powders and grains (2017) - A high-performance head and extremity insert gradient for rapid and short-T2 imaging: 200 mT/m, 1200 mT/m/ ms, and 100% duty cycle - Conference Paper
ESMRMB Congress (2017) - Magnetic resonance imaging of gas-solid fluidization with liquid bridging - Conference Poster not in Proceedings
International Conference on Micromechanics of Granular Media (Powders and grains 2017)
2016
- Real-time magnetic resonance imaging of highly dynamic granular phenomena - Conference Paper
March Meeting of the American Physical Society (2016) - Fast magnetic resonance imaging of the internal impact response of dense granular suspensions - Conference Paper
March Meeting of the American Physical Society (2016)
2015
- Ultra-fast parallel magnetic resonance imaging of granular systems - Conference Paper
March Meeting of the American Physical Society (2015) - Real-Time Imaging of Granular Dynamics with Advanced MRI Methods - Conference Paper
AIChE Annual Meeting (2015) - Parallel magnetic resonance imaging of gas-liquid flows - Conference Paper
March Meeting of the American Physical Society (2015)
2014
- Correlating surface cation composition and thin film microstructure with the electrochemical performance of lanthanum strontium cobaltite (LSC) electrodes - Journal Article
Journal of Materials Chemistry A 2 (19): 7099-7108 (2014-05-21)
Open Access | Publisher DOI - Electrochemical properties of La₀.₆Sr₀.₄CoO 3 - δ thin films investigated by complementary impedance spectroscopy and isotope exchange depth profiling - Journal Article
Solid State Ionics (256): 38-44 (2014-03-01)
Open Access | Publisher DOI - Magnetic resonance imaging of granular matter - Conference Paper
Condensed Matter (2014) - Parallel Magnetic Resonance Imaging of fluidized and spouted beds - Conference Paper
International Workshop on Fluid-Particle Systems (2014)
2013
- Cation diffusion in La₀.₆Sr₀.₄CoO 3 - δ below 800 °C and its relevance for Sr segregation - Journal Article
Physical Chemistry Chemical Physics 16 (6): 2715-2726 (2014-02-14)
Open Access | Publisher DOI