Study of a platelet catalytic three-phase reactor filled with a Pt-β-SiC using formic acid oxidation as test reaction

International @ CDFA+TSN:MTF:PFOInternational audienceA platelet catalytic three-phase reactor equipped wit a Pt--SiC foam was characterized first in cold conditions (O2-water) with hydrodynamic of liquid phase and gas-liquid mass transfer. Axial dispersion was significant and dependant of operating conditions like interstitial velocities, foam morphology or flow direction as well as kLa in the range of 0.3 to 0.8.10-3 s-1. A specific protocol has been optimized to deposit Pt on the SiC foam. Intrinsic activity was determined and compare with other catalysts. Finally, platelet catalytic foam reactor was tested in continuous using acid formic oxidation as a model reaction. Reactor optimization has to be continued in order to avoid possible external mass transfer limitations

Study of a platelet catalytic three-phase reactor filled with a Pt-β-SiC using formic acid oxidation as test reaction

International @ CDFA+TSN:MTF:PFOInternational audienceA platelet catalytic three-phase reactor equipped wit a Pt--SiC foam was characterized first in cold conditions (O2-water) with hydrodynamic of liquid phase and gas-liquid mass transfer. Axial dispersion was significant and dependant of operating conditions like interstitial velocities, foam morphology or flow direction as well as kLa in the range of 0.3 to 0.8.10-3 s-1. A specific protocol has been optimized to deposit Pt on the SiC foam. Intrinsic activity was determined and compare with other catalysts. Finally, platelet catalytic foam reactor was tested in continuous using acid formic oxidation as a model reaction. Reactor optimization has to be continued in order to avoid possible external mass transfer limitations

Methodology for the study of vacuum gas oil hydrocracking catalysts in a batch reactor

International @ RAFFINAGE+MTFInternational audienceNon

Consequence of structural identifiability properties on state-model formulation for linear inverse chromatography

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Modelling and simulation of a catalytic membrane reactor

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A new technique for the determination of contact time distribution (CTD) from tracers experiments in heterogeneous systems

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Numerical simulation of non-isothermal gas–liquid absorption with chemical reaction on a spherical laminar film Application to phosgene absorption into aqueous sodium hydroxide solutions

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Non-isothermal gas–liquid absorption with chemical reaction studies

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A transient permeation-based method for composite zeolite membranes characterization

International audienceAn in situ nondestructive characterization method for zeolite composite membranes, based on transient permeation experiments, is proposed in the present article. This technique allows an accurate evaluation of the zeolite selective layer thickness as well as the thermodynamic and transport properties of sorbing hydrocarbons. To this end, a dynamic model representing mass transport phenomena within the whole permeating module is derived. In order to get the crystal layer properties, a two‐step experimental approach is required. The zeolite layer effective thickness is first estimated with the permeation of a nonadsorbing species like hydrogen. Then, the adsorption equilibrium constants and the diffusion coefficients of butane isomers are determined. Three membranes obtained by different synthesis procedures are studied in the Henry domain. The estimated values of the equilibrium constants and diffusion coefficients for normal butane and isobutane are favorably compared with existing literature data. © 2008 American Institute of Chemical Engineers AIChE J, 200

BATCH REACTOR MODELLING: KINETIC INTEGRATING VAPOR-LIQUID EQUILIBRIUM

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