| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Moos, Ralf
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (28/28 displayed)
- 2024Powder aerosol deposited calcium cobaltite as textured P-type thermoelectric material with power factors approaching single crystal valuescitations
- 2023Gauge to simultaneously determine the electrical conductivity, the Hall constant, and the Seebeck coefficient up to 800 °C
- 2023Analysis of defect mechanisms in nonstoichiometric ceria–zirconia by the microwave cavity perturbation methodcitations
- 2023Chemical expansion of CeO2−δ and Ce0.8Zr0.2O2−δ thin films determined by laser Doppler vibrometry at high temperatures and different oxygen partial pressurescitations
- 2021Novel, low-cost device to simultaneously measure the electrical conductivity and the Hall coefficient from room temperature up to 600 °Ccitations
- 2021Linking the Electrical Conductivity and Non-Stoichiometry of Thin Film Ce1−xZrxO2−δ by a Resonant Nanobalance Approachcitations
- 2021Linking the electrical conductivity and non-stoichiometry of thin film Ce1−xZrxO2−δ by a resonant nanobalance approachcitations
- 2020Determination of the Dielectric Properties of Storage Materials for Exhaust Gas Aftertreatment Using the Microwave Cavity Perturbation Methodcitations
- 2020Cyclic and square-wave voltammetry for selective simultaneous NO and O2 gas detection by means of solid electrolyte sensorscitations
- 2019Manufacturing Dense Thick Films of Lunar Regolith Simulant EAC-1 at Room Temperaturecitations
- 2019Flexible, heat-resistant and flame-retardant glass fiber nonwoven/glass platelet-composite separator for lithium-ion batteries
- 2016Platform to develop exhaust gas sensors manufactured by glass-solder-supported joining of sintered yttria-stabilized zirconiacitations
- 2016Effect of annealing on the permittivity of ceramic films manufactured by the Aerosol Deposition Method
- 2015Effect of annealing on the permittivity of ceramic films prepared by the Aerosol Deposition Method
- 2015Some practical points to consider with respect to thermal conductivity and electrical resistivity of ceramic substrates for high-temperature gas sensorscitations
- 2014A laboratory test setup for in situ measurements of the dielectric properties of catalyst powder samples under reaction conditions by microwave cavity perturbation: set up and initial testscitations
- 2014Detection of NO by pulsed polarization technique using Pt interdigital electrodes on yttria-stabilized zirconiacitations
- 2012Influence of sintering conditions on doped PZT ceramics for base-metal electrode multilayer actuatorscitations
- 2008Defect chemistry of donor-doped and undoped strontium titanate ceramics between 1000° and 1400°C
- 2008Dependence of the intrinsic conductivity minimum of SrTiO3 ceramics on the sintering atmosphere
- 2008Hall mobility of undoped n-type conducting strontium titanate single crystals between 19 K and 1373 K
- 2008Solubility of lanthanum in strontium titanate in oxygen-rich atmospheres
- 2006Nanoscaled p-type semiconductors for gas sensing : nanopowders, nanofilms, and nanowires
- 2006Effect of electrodes and zeolite cover layer on hydrocarbon sensing with p-type perovskite SrTi0.8Fe0.2O3-δ thick and thin filmscitations
- 2005Hydrocarbon sensing with thick and thin film p-type conducting perovskite materialscitations
- 2004Hydrocarbon sensing with thick and thin film p-type conducting perovskite materials
- 2004Thick and thin film p-type conducting perovskite materials for hydrocarbon sensing
- 2003A hydrocarbon sensor based on p-type strontium titanate ferrate
Places of action
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article
A laboratory test setup for in situ measurements of the dielectric properties of catalyst powder samples under reaction conditions by microwave cavity perturbation: set up and initial tests
Abstract
The catalytic behavior of zeolite catalysts for the ammonia-based selective catalytic reduction (SCR) of nitrogen oxides (NOX) depends strongly on the type of zeolite material. An essential precondition for SCR is a previous ammonia gas adsorption that occurs on acidic sites of the zeolite. In order to understand and develop SCR active materials, it is crucial to know the amount of sorbed ammonia under reaction conditions. To support classical temperature-programmed desorption (TPD) experiments, a correlation of the dielectric properties with the catalytic properties and the ammonia sorption under reaction conditions appears promising. In this work, a laboratory test setup, which enables direct measurements of the dielectric properties of catalytic powder samples under a defined gas atmosphere and temperature by microwave cavity perturbation, has been developed. Based on previous investigations and computational simulations, a resonator cavity and a heating system were designed, installed and characterized. The resonator cavity is designed to operate in its TM010 mode at 1.2 GHz. The first measurement of the ammonia loading of an H-ZSM-5 zeolite confirmed the operating performance of the test setup at constant temperatures of up to 300 °C. It showed how both real and imaginary parts of the relative complex permittivity are strongly correlated with the mass of stored ammonia.