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Lioubov Kiwi

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Related publications (131)

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

Lioubov Kiwi, Albert Renken, 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

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

Lioubov Kiwi, Albert Renken, 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

Growth of carbon nanotubes and microfibers over stainless steel mesh by cracking of methane

Lioubov Kiwi, Albert Renken

The

{La}_{2}{NiO}_{4}

film was synthesized on the 304 stainless steel (SS) mesh. The hydrogen reduction of La2NiO4 generated homogeneous nanocatalyst particles (probably

{Ni}/{La}_2{O}_{3}

) over which methane was cracked, producing carbon notubes/micro ...

2008

Biphasic Hydrogenation over PVP Stabilized Rh Nanoparticles in Hydroxyl Functionalized Ionic Liquids

Lioubov Kiwi, Gabor Laurenczy, Paul Joseph Dyson, Zhaofu Fei, Rocio Micaela Crespo Quesada, Ning Yan, Yuehui Li, Xuemei Yang

Polyvinylpyrrolidone stabilized rhodium nanoparticles are highly sol. in hydroxyl-functionalized ionic liqs., providing an effective and highly stable catalytic system. In hydrogenation reactions, excellent results were obtained, and transmission electron ...

2008

Novel design of a microstructured reactor allowing fast temperature oscillations

Lioubov Kiwi, Albert Renken, Martin Luther

Two types of stainless steel microstructured reactors for catalytic gas-phase reactions have been developed and characterized with respect to their thermal behaviour under non-stationary temperature conditions. One of the reactors used (FTC-I) allowed peri ...

2008

Monodispersed Pd Nanoparticles for Acetylene Selective Hydrogenation: Particle Size and Support Effects

Lioubov Kiwi, Marina Ruta

Monodispersed Pd nanoparticles (8, 11, and 13 nm in iameter) as confirmed by high resolution transmission electron microscopy were prepared via the reverse microemulsion method and deposited on structured supports consisting of carbon nanofibers (CNF) grow ...

2008

Nitrous Oxide Decomposition on the Binuclear $\left$ Center in Fe-ZSM-5 Zeolite

Lioubov Kiwi

The reaction mechanism for nitrous oxide (

{N}_{2}O

) direct decomposition into molecular nitrogen and oxygen was studied on binuclear iron sites in Fe-ZSM-5 zeolite using the density functional theory (DFT). Starting from the hydroxylated bi-iron complex ...

2008

Pd Nanoparticles in a Supported Ionic Liquid Phase: Highly Stable Catalysts for Selective Acetylene Hydrogenation under Continuous-Flow Conditions

Lioubov Kiwi, Gabor Laurenczy, Marina Ruta, Paul Joseph Dyson

Monodispersed Pd nanoparticles of 5 and 10 nm were obtained via reduction of Pd(acac)2 dissolved in ionic liquid (IL), [bmim][PF6], or [bmimOH][TF2N], supported on carbon nanofibers (CNF) anchored to sintered metal fibers (SMF). Using [bmimOH][TF2N], the m ...

2008

Structured catalyst of Pd/ZnO on sintered metal fibers for 2-methyl-3-butyn-2-ol selective hydrogenation (vol 251, pg 213, 2007)

Lioubov Kiwi, Albert Renken, Nicolas Xanthopoulos, Martin Grasemann

Elsevier2008

Liquid–liquid two-phaseflow patterns andmasstransfer characteristics inrectangular glassmicroreactors

Lioubov Kiwi, Albert Renken, Anne-Laure Dessimoz

The flow of two immiscible fluids was investigated in rectangular glass microchannels with equivalent diameters of 269 and 400

\mu m

. Deionised water, dyed toluene and hexane were selected as probe fluids. Flow patterns were obtained for Y- and T-junction ...

Elsevier2008

Non-thermal plasma catalytic reactor for hydrogen production by direct decomposition of H2S

Lioubov Kiwi, Albert Renken

Hydrogen production by non-thermal plasma (NTP) assisted direct decomposition of hydrogen sulfide was carried out in a novel dielectric barrier discharge (DBD) reactor with the inner electrode made of sintered metal fibers (SMF) also functioning as catalys ...

2008

Forced periodic temperature cycling of chemical reactions in microstructure devices

Lioubov Kiwi, Albert Renken, Martin Luther

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

Photocatalytic discoloration of Methyl Orange on innovative parylene–TiO2 flexible thin films under simulated sunlight

Juan Kiwi, Lioubov Kiwi, Albert Renken, Danièle Laub

Parylene films loaded with TiO2 are reported as hotocatalysts in azo dye discoloration processes. The TiO2 loading of the parylene film was 0.32% (w/w) and the amount of TiO2 on the film was about two orders of magnitude below the TiO2 added in suspension ...

2008

Preparation, stabilization and characterization of TiO2 on thin polyethylene films (LDPE): Photocatalytic applications

Philippe Buffat, Juan Kiwi, Lioubov Kiwi, Andrzej Kulik, Albert Renken, Danièle Laub, Kyumin Lee

An innovative way to fix preformed nanocrystalline TiO2 on low-density polyethylene film (LDPE-TiO2) is presented. The LDPE-TiO2 film was able to mediate the complete photodiscoloration of Orange II using about seven times less catalyst than a TiO2 suspens ...

2007

Palladium Nanoparticle Size Effect in 1-Hexyne Selective Hydrogenation

Lioubov Kiwi, Albert Renken

The structure sensitivity of a liquid-phase 1-hexyne hydrogenation was studied using monodispersed nonsupported Pd nanoparticles of 6, 8, 11, 13, and 14 nm diameter. The particles were prepared via a reverse microemulsion water/AOT/isooctane. The size was ...

2007

Ionic liquid synthesis in a microstructured reactor for process intensification

Lioubov Kiwi, Albert Renken

Ionic liquids (IL) are the focus of growing interest over the last few years due to their low vapour pressure being beneficial for replacing common organic solvents with high vapour pressure. IL synthesised via alkylation are produced in batch or semi-batc ...

2007

NMR microimaging of fluid flowin model string-type reactors

Lioubov Kiwi

Magnetic resonance microimaging (MRM) was employed to obtain quantitative velocity maps of water flowing in the channels possessing unconventional cross-section shapes formed by a bundle of parallel fibers within a tubular string-type reactor. The maps obt ...

Elsevier2007

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

Lioubov Kiwi, Albert Renken

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

ZnSO4-TiO2 Doped Catalyst with Higher Activity in Photoctalytic

Michaël Bensimon, Juan Kiwi, Lioubov Kiwi, Danièle Laub, Victor Sarria

2007

Monodispersed Pd-nanoparticles on carbon fiber fabrics as structured catalyst for selective hydrogenation

Lioubov Kiwi, Albert Renken

Monodispersed Pd-nanoparticles (similar to 8nm) prepared via a modified microemulsion method were deposited on active carbon fibers (ACF) fabrics and studied in a semi-batch 1-hexyne liquid-phase hydrogenation. The catalyst Pd(0.45 wt%)/ACF demonstrated > ...

Elsevier2007

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