Sustainable biocatalysis syntheses have gained considerable popularity over the years. However, further optimizations - notably to reduce costs are required if methods be successfully deployed in a range of areas. As part this drive, various enzyme immobilization strategies been studied, alongside process intensification from batch continuous production. The flow bioreactor portfolio mainly ranges between packed bed reactors and wall-immobilized miniaturized reactors. Because their...

Abstract In recent years, many biocatalytic processes have been developed for the production of chemicals and pharmaceuticals. this context, enzyme immobilization methods attracted attention their advantages, such as continuous increased stability. Here, a collection nitrilases from biodiversity conversion 3‐cyanopyridine to nicotinic acid were screened. Substrate over 10 cycles was monitored optimize process. The best conditions found with cross‐linking using glutaraldehyde modify PMMA...

If the interest of heat exchanger/reactors have been demonstrated for homogeneous liquid phase applications, many chemical syntheses take place in multiphase media (gas-liquid, liquid-liquid, gas-liquid-solid...). Thus, order to evaluate versatility a plate-type exchanger/reactor with 2D-meandering millichannel, this work is focused on characterization hydrodynamics liquid-liquid flow reaction channel. Therefore, several prototypes are built millichannels increasing dimensions address...

Crude oil fouling of a shell-and-tube heat exchanger sized according to TEMA standard is compared No-Foul design under industrial operating conditions. For similar conditions, and exchangers have the same behavior regarding fouling. Since one has less tubes by for duty, shear stress increased. Consequently, prone at throughput. Impact tube bundle geometry then investigated. Helically finned are plain in exchanger. Under rates measured up an order magnitude lower than (respectively 10−11...

Hydrogen production by Rhodobacter capsulatus is an anaerobic, photobiological process requiring specific mixing conditions. In this study, innovative design of a photobioreactor proposed. The based on plate-type with interconnected meandering channel to allow culture and H2 degassing. flow was characterized as quasi-plug-flow radial caused turbulent-like regime achieved at low Reynolds number. dissipated volumetric power decreased 10-fold while maintaining PBR performances (production...

Additive manufacturing has made possible new geometry's design. The promise of these technologies is prime importance in the heat exchanger's performance. Nevertheless, this fabrication process creates more or less rough topologies, thus, different thermal-hydraulic behaviors, which are not fully known, controlled and predictable case mini-channels (2 mm diameter study). aim work to test compare experimental performances meandering mini–channels. They obtained by a Laser-Powder Bed Fusion...

Numerical simulation is studied for shell and tube heat exchangers incorporating the usage of local Ebert Panchal threshold fouling model on overall prediction. The rate obtained by averaging rates along whole exchanger was found to be consistent with calculated quantities, at least shell-and-tube tested, under operating conditions (299.5 °C film temperature, 4.4 Pa wall shear stress) period linear fouling. deposition rate, which minimally affected spatial variations thermohydraulic...

Le domaine de l'intensification des echanges chaleur a depuis nombreuses annees depasse le stade du laboratoire et largement ete pris en compte dans les applications industrielles. Nombre d'echangeurs procedes tres divers sont equipes surfaces d'echange (tubes ou plaques) specialement concues pour presenter coefficients eleves notablement superieurs ceux lisses.

Cet article decrit les principales technologies industrielles aboutissant a la realisation d'un echangeur de chaleur. Les divers criteres classement des echangeurs sont technologiques, par procede et mode transfert chaleur, fonction ou materiau constituant parois. Un tableau donne principaux types d'echangeurs en ces criteres. plus utilises (a tubes, plaques, etc.) detailles precisant applications pour lesquelles ils mieux adaptes.