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Albert Renken

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Publications associées (53)

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Palladium nanoparticles stabilized in block-copolymer micelles for highly selective 2-butyne-1,4-diol partial hydrogenation

Albert Renken, Lioubov Kiwi, Sandra Parra Cardona, Eric Joannet

Pd nanoparticles (2 nm) stabilized in the micelle core of poly(ethylene oxide)-block-poly(2-vinylpyridine) were studied in partial hydrogenation of 2-butyne-1,4-diol. Both unsupported micelles (0.6 kg Pd/m3) and supported ones on g-Al2O3 (0.042% Pd) showed ...

2005

Fine structuration of low-temperature co-fired ceramic (LTCC) microreactors

Albert Renken, Thomas Maeder, Lioubov Kiwi, Paul Muralt, Bo Jiang, Julien Haber

The development of microreactors that operate under harsh conditions is always of great interest for many applications. Here we present a microfabrication process based on low-temperature co-fired ceramic (LTCC) technology for producing microreactors which ...

Royal Society of Chemistry2015

Transient kinetics of toluene interaction with V/Ti-oxides in anaerobic conditions

Albert Renken, Lioubov Kiwi

Toluene interaction with the catalysts consisting of 0.35, 0.62, 0.75 and 3.7 monolayers (ML) of VOx supported on anatase–titania, containing potassium, was studied by transient response techniques at 523–673 K. FT-Raman spectroscopy under dehydrated condi ...

2005

Process for the preparation of 2-butene-1.4-diol

Albert Renken, Lioubov Kiwi, Eric Joannet

NOVELTY - A 2-butene-1,4-diol is prepared by hydrogenating 2-butyne-1,4-diol in the presence of a structured catalyst and in the absence of a solvent. USE - For preparing 2-butene-2,4-diol that is an important industrial intermediate in the preparation of ...

2005

Activated carbon fibers for efficient VOC removal from diluted streams: the role of surface morphology

Albert Renken, Lioubov Kiwi, Guillaume Bastien Baur

The effect of the micropore structure of activated carbon fibers (ACFs) on the adsorption of toluene at low concentration (10-80 ppmv) was studied over two types of ACFs. Both adsorbents presented similar surface chemistry but different porous structure: o ...

Springer Verlag2015

Low Temperature Decomposition of Nitrous Oxide over Fe/ZSM-5: Modelling of the Dynamic Behaviour

Albert Renken, Lioubov Kiwi

The kinetics of N2O decomposition to gaseous nitrogen and oxygen over HZSM-5 catalysts with low content of iron (

2005

Structured fixed-bed adsorber based on zeolite/sintered metal fibre for low concentration VOC removal

Albert Renken, Lioubov Kiwi, Kim Martin Nikolajsen

A novel adsorber with a structured fixed-bed made of sintered metal fibres (SMF) plates has been developed for purification of low-content VOCs gas-streams. The surface of the metal fibres was coated by a thin, homogeneous MFI-type (ZSM-5, Silicalite-1) ze ...

2006

Kinetics of the solvent-free hydrogenation of 2-methyl-3-butyn-2-ol over a structured Pd-based catalyst

Albert Renken, Lioubov Kiwi, Rocio Micaela Crespo Quesada, Martin Grasemann

The solvent-free selective hydrogenation of 2-methyl-3-butyn-2-ol (MBY) to 2-methyl-3-buten-2-ol (MBE) was studied over a Pd/ZnO structured catalyst and compared to its behavior in water-assisted conditions. The catalytic behavior was correlated with the s ...

2009

Kinetics of the Decomposition of Hydrogen Sulfide in a Dielectric Barrier Discharge Reactor

Albert Renken, Lioubov Kiwi

Kinetics of hydrogen sulfide (H2S) decomposition to hydrogen and sulfur was investigated in a nonthermal plasma dielectric barrier discharge (NTP-DBD) reactor operated under ambient conditions. The reactions were carried out with a fixed flow rate and vary ...

Wiley-Blackwell2012

Nonthermal plasma Abatement of trichloroethylene Enhanced by Photocatalysis

Albert Renken, Lioubov Kiwi, Danièle Laub

Abatement of trichloroethylene (TCE, 250 ppm in air) was studied in a novel nonthermal plasma (NTP) dielectric barrier discharge reactor with an inner electrode made of sintered metal fibers (SMF). The SMF electrodes modified with TiO2 and MnO2 were observ ...

2007

Improved performance of non-thermal plasma reactor during decomposition of trichloroethylene: Optimization of the reactor geometry and introduction of catalytic electrode

Albert Renken, Lioubov Kiwi

The decomposition of trichloroethylene ITCE) by non-thermal plasma was investigated in a dielectric barrier discharge (DBD) reactor with a copper rod inner electrode and compared with a plasma-catalytic reactor. The particularity of the plasma-catalytic re ...

2007

Three-Phase Catalytic Hydrogenation of a Functionalized Alkyne: Mass Transfer and Kinetic Studies with in Situ Hydrogen Monitoring

Albert Renken, Lioubov Kiwi, Martin Grasemann

Systematic studies of mass transfer interactions with intrinsic reaction kinetics were performed for the threephase selective hydrogenation of 2-methyl-3-butyn-2-ol (MBY) to 2-methyl-3-buten-2-ol (MBE) over a modified Pd/CaC

{O}_{3}

catalyst under solvent ...

2008

Mixing efficiency and energy consumption for five generic microchannel designs

Albert Renken, Lioubov Kiwi, Madhvanand Namadeo Kashid

Mixing is an essential part of chemical processes. In the present work, homogeneous mixing at relatively high throughput for a single microchannel (of 1-18 mL/min) was investigated in microchannels with different dimensions, cross sections and mixing eleme ...

2011

Formation of the surface NO during N2O interaction at low temperature with iron-containing ZSM-5

Albert Renken, Lioubov Kiwi

Interaction of N2O at low temps. (473-603 K) with Fe-ZSM-5 zeolites (Fe, 0.01-2.1 wt%) activated by steaming and/or thermal treatment in He at 1323 K was studied by the transient response method and temp.-programmed desorption (TPD). Diffuse reflectance IR ...

2006

Forced periodic temperature cycling of chemical reactions in microstructure devices

Albert Renken, Lioubov Kiwi

In this publication, several stainless steel microstructure reactors specially designed to obtain rapid and periodic temperature changes are presented. Different microstructure reactor designs have been manufactured and tested for their thermal behaviour a ...

Elsevier2008

“Sandwich Reactor” for Heterogeneous Catalytic Processes: N2O Decomposition as a Case Study

Albert Renken, Lioubov Kiwi, Bryan Bromley

A novel “sandwich” microreactor designed as a thin (∼ 300

\mu

m) porous plate of sintered metal fibers (SMF), sandwiched between metallic plates is reported. The SMF surface was coated by Fe-ZSM-5 thin film (< 2

\mu

m) rendering a catalyst highly active ...

2008

Photonic contacting of gas-liquid phases in a falling film microreactor for continuous-flow photochemical catalysis with visible light (vol 1, pg 636, 2016)

Albert Renken

2019

Synthesis, characterisation and catalytic properties of vanadium substituted mesoporous aluminophosphates

Albert Renken, Benoît Louis

Vanadium substituted mesoporous AlPO have been synthesized using structure-directing surfactant under hydrothermal synthesis conditions. The presence of V in the framework of AlPO has been established by ESR, XPS, UV-vis DRS and ICP-AES measurements. This ...

2005

Novel Catalytic Dielectric Barrier Discharge Reactor for Gas-Phase Abatement of Isopropanol

Albert Renken, Lioubov Kiwi

Catalytic gas-phase abatement of air containing 250 ppm of isopropanol (IPA) was carried out with a novel dielectric barrier discharge (DBD) reactor with the inner catalytic electrode made of sintered metal fibers (SMF). The optimization of the reactor per ...

2007

Biphasic Model Describing Soybean Oil Epoxidation with H2O2 in Continuous Reactors

Albert Renken

Epoxidized soybean oil (ESBO) is produced in industry by reacting soybean oil, at 60-70 degrees C, with hydrogen peroxide in the presence of formic or acetic acid. A small amount of sulphuric or phosphoric acid is necessary to catalyze the oxidation of the ...

2012