Person
Albert Renken
Related publications (304)
Photonic contacting of gas-liquid phases in a falling film microreactor for continuous-flow photochemical catalysis with visible light
A microstructured falling film reactor was applied to the dye-sensitized photochemical conversion of 1,5-dihydroxynaphthalene to juglone. This continuous-flow microreactor enables the efficient contacting of a gas and a liquid phase in combination with ext ...
Royal Soc Chemistry2016Activated 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 Verlag2015Fine structuration of low-temperature co-fired ceramic (LTCC) microreactors
Albert Renken, Paul Muralt, Lioubov Kiwi, Thomas Maeder, 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 Chemistry2015Intensification of highly exothermic fast reaction by multi-injection microstructured reactor
Albert Renken, John Richard Thome, Lioubov Kiwi, Thomas Maeder, Navid Borhani, Bo Jiang, Julien Haber
Microstructured reactors (MSR) with characteristic dimensions below 100 μm are warranted to maintain close to isothermal conditions when carrying out quasi-instantaneous highly exothermic reactions. Unfortunately, such small dimensions increase the risk of ...
Elsevier2014Micro-batch reactor for catching intermediates and monitoring kinetics of rapid and exothermic homogeneous reactions
Albert Renken, Lioubov Kiwi, Madhvanand Namadeo Kashid, Petra Prechtl, Olivier Détraz, Mireia Santacana Moya
The mechanism and kinetics of rapid and exothermic reactions is difficult to study using conventional offline techniques. This paper deals with experimental investigations of highly exothermic and fast model reaction (cyclisation of pseudoionone) using slu ...
Elsevier2013Infrared imaging of temperature profiles in microreactors for fast and exothermic reactions
Albert Renken, John Richard Thome, Lioubov Kiwi, Navid Borhani, Madhvanand Namadeo Kashid, Julien Haber
Though microreactors provide high heat transfer rates, temperature profiles are formed in case of fast and highly exothermic reactions. A method based on non-intrusive infrared thermometry has been developed to track these profiles quantitatively with a re ...
Elsevier2013Effect of hot spots in microstructured reactors on product distribution during quasi-instantaneous exothermic reactions
Albert Renken, John Richard Thome, Lioubov Kiwi, Thomas Maeder, Navid Borhani, Bo Jiang, Julien Haber
Background. The small characteristic sizes (in the range of 102 - 103 μm) of Microstructured reactors (MSR) lead to very high specific interfacial area which, in turn, increases heat- and mass transfer efficiency. However, for quasi instantaneous exothermi ...
2013Multi-injection microstructured reactor for intensification of fast exothermic reactions: proof of concept
Albert Renken, Lioubov Kiwi, Thomas Maeder, Bo Jiang, Julien Haber
Quasi-instantaneous exothermic reactions lead to the formation of unwanted hot spots even when carried out in conventional microstructured reactors (MSR) with tube diameter of 100 − 1000 μm. For this reason, alternative MSR designs are warranted to enable ...
Walter de Gruyter2013Biphasic Model Describing Soybean Oil Epoxidation with H2O2 in Continuous Reactors
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 ...
2012Heat Management in Single and Multi-injection Microstructured Reactors: Scaling Effects, Stability Analysis, and Role of Mixing
Albert Renken, Lioubov Kiwi, Madhvanand Namadeo Kashid, Julien Haber
The exothermic reactions with fast intrinsic kinetics when carried out in conventional reactors are often limited by heat transfer. This results in the formation of hot spots, which affects product distribution of complex reactions and may lead to reactor ...
2012