Personne
Julien Haber
Cette personne n’est plus à l’EPFL
Publications associées (9)
Fine 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 ...
Elsevier2014Heat Management for Process Intensification of Fast Exothermic Reactions in Microstructured Reactors
Nowadays, the production in fine chemical and pharmaceutical industry is mostly carried out in large scale batch reactors having typically dimensions of a few meters to satisfy the demand of the market. Even though this technology has been widely used and ...
EPFL2013Sintered metal fibers coated with transition metal oxides as structured catalysts for hydrogen peroxide decomposition
This study aimed at the development of active and stable structured catalyst for the decomposition of hydrogen peroxide under industrial conditions. Sintered metal fibers of stainless steel (SMFss) in the form of flat panels were surface coated by differen ...
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 Gruyter2013Heat 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 ...
2012Characterization of hot spots in microstructured reactors for fast and exothermic reactions in mixing regime
Albert Renken, John Richard Thome, Lioubov Kiwi, Thomas Maeder, Navid Borhani, Bo Jiang, Madhvanand Namadeo Kashid, Julien Haber
The intensification of fast exothermic reactions can be achieved by using microstructured reactors (MSR) which provide improved mass & heat transfer rates leading to higher overall reaction kinetics. But for highly exothermic reactions the heat evacuation ...
2012