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Dive into the research topics where Melaz Tayakout-Fayolle is active.

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Featured researches published by Melaz Tayakout-Fayolle.


Chemical Engineering Journal | 2001

Non-isothermal gas-liquid absorption with chemical reaction studies. Temperature measurements of a spherical laminar film surface and comparison with a model for the CO2/NaOH system

M. Taghizadeh; Christian Jallut; Melaz Tayakout-Fayolle; J. Lieto

The present work deals with the temperature measurements of a thin spherical liquid film surface during non-isothermal absorption with chemical reaction. The absorption of CO2 into aqueous NaOH solutions has been used to test the proposed technique. The measurement is based on the use of an infrared pyrometer through a ZnSe window. The experimental results are compared to calculated values obtained from a previously described non-isothermal model. The measured and computed values of the flux of absorbed gas and the temperature profiles are very close without performing any parameter adjustment. The highest measured temperature increase is about 5 K, and despite this low thermal effect, the system has proved to be highly sensitive.


Chemical Engineering Science | 2003

Kinetic parameter estimation and modelling of sucrose esters synthesis without solvent

A.-L Le Coënt; Melaz Tayakout-Fayolle; F Couenne; S. Briançon; J. Lieto; J Fitremann-Gagnaire; Y Queneau; A Bouchu

Abstract In this paper, a kinetic model for the synthesis of the sucrose esters without solvent is developed. This synthesis is a heterogeneous reaction between the sucrose (solid) and the methyl palmitate (liquid) in the presence of a solid catalyst. We have established the kinetic model by steps, by first considering a homogeneous model and then by taking into account the heterogeneity of the medium. Thus, we have assumed additional steps in the model corresponding to the activation of the solid sucrose by the catalyst and autocatalytic steps. This activation parameter is associated to the viscosity of the medium. As a consequence of these observations, the study of the sensibility and the accuracy of the parameters allowed us to simplify the model.


Advanced Materials Research | 2012

Methodology for the Study of Vacuum Gas Oil Hydrocracking Catalysts in a Batch Reactor – Coupling of GC-2D Data with Vapour-Liquid Equilibrium

Reynald Henry; Melaz Tayakout-Fayolle; Pavel Afanasiev; F. Couenne; Grégory Lapisardi; Laurent Simon; Vincent Souchon

A new approach for studying complex feedstock conversion with a hydrocracking catalyst is proposed in this work. The reaction was carried out in a batch reactor. Vapor and liquid samples were taken at different reaction times, both at operating conditions and after cooling to room temperature. Two-dimensional gas chromatography was used to characterize in detail the composition of condensed vapor and of liquid phases, while gas samples were analyzed by conventional gas chromatography. From room temperature conditions data, vapor fraction of the hydrocarbon mixture and compositions of each phase at reaction condition were calculated and validated. Following this methodology then allows a simple tracking technique for the study of complex hydrocarbon mixture reactions in liquid and vapor phases.


Computer-aided chemical engineering | 2008

Composite zeolite membranes characterization by using a transient state experimental technique and a parameter estimation procedure

Lucile Courthial; Arnaud Baudot; Melaz Tayakout-Fayolle; Christian Jallut

We describe a non-destructive transient state method for the determination of thermodynamic and transport properties of zeolite composite membranes. The properties under consideration are included as parameters of a linear dynamic model of the membrane. The parameters values are obtained thanks to an estimation procedure based on the comparison between simulated and measurements realized in the linear domain. A step-by-step experimental procedure is derived from a structural identifiability analysis of a simplified linear model of the membrane. A more detailed linear model is then used for the estimation procedure. Due to its transient nature, this technique allows the zeolite selective layer effective thickness determination as well as that of thermodynanic and transport properties of sorbing hydrocarbons. Some examples of results are given to illustrate the capabilities of the technique.


Industrial & Engineering Chemistry Research | 2001

Determination of Mass Transfer and Thermodynamic Properties of Branched Paraffins in Silicalite by Inverse Chromatography Technique

Elsa Jolimaitre; Melaz Tayakout-Fayolle; Christian Jallut; K. Ragil


Chemical Engineering Science | 2013

Hydroconversion of an atmospheric residue with a dispersed catalyst in a batch reactor: Kinetic modeling including vapor–liquid equilibrium

Thanh Son Nguyen; Melaz Tayakout-Fayolle; Marie Ropars; Christophe Geantet


Fuel | 2012

Hydrodesulfurization and hydrodemetallization of different origin vacuum residues: Characterization and reactivity

C. Ferreira; Melaz Tayakout-Fayolle; Isabelle Guibard; F. Lemos; H. Toulhoat; F. Ramôa Ribeiro


Chemical Engineering Science | 2012

Crystallite size effect in the sulfidation of ZnO by H2S: Geometric and kinetic modelling of the transformation

Celine Babe; Melaz Tayakout-Fayolle; Christophe Geantet; M. Vrinat; Gérard Bergeret; Thierry Huard; Delphine Bazer-Bachi


Catalysis Today | 2014

Vacuum gas oil hydrocracking performance of bifunctional Mo/Y zeolite catalysts in a semi-batch reactor

Reynald Henry; Melaz Tayakout-Fayolle; Pavel Afanasiev; Chantal Lorentz; Grégory Lapisardi; Gerhard D. Pirngruber


Chemical Engineering Science | 2007

A double linear driving force approximation for non-isothermal mass transfer modeling through bi-disperse adsorbents

Damien Leinekugel-le-Cocq; Melaz Tayakout-Fayolle; Yann Le Gorrec; Christian Jallut

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Maxime Lacroix

Centre national de la recherche scientifique

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