André Zoulalian

article

Convective drying of onion: modeling of drying kinetics parameters

Aboubakar Compaoré, Aditya Putranto, A. O. Dissa, Samuel Ouoba, more

Journal of Food Science and Technology > 2019 > 56 > 7 > 3347-3354

Drying is a simultaneous heat and mass transfer processes. Drying kinetics is determined by both internal properties and external drying conditions. In this study, two important drying kinetics parameters of onions i.e. effective water diffusivity and relative activation energy of reaction engineering approach (REA) are determined. The generated parameters are used to model thin layer drying of onion...

article

Mathematical modelling and numerical simulation of a simple solar dryer for tropical wood using a collector

Merlin Simo-Tagne, André Zoulalian, Romain Rémond, Yann Rogaume

Applied Thermal Engineering > 2018 > 131 > C > 356-369

The main objective of this paper is to develop a computational model and to simulate the drying of timber with a solar dryer. Two sets of equations have been established: one for the solar collector and the other for the drying chamber. The computed and measured outlet temperatures of the solar collector were compared. A very satisfactory prediction by the model is observed. The theoretical variations...

chapter

Parametric study of a wood solar dryer with glazed walls in a Moroccan climate

Naoual Bekkioui, Abdelilah Hakam, Andre Zoulalian

2016 International Renewable and Sustainable Energy Conference (IRSEC) > 737 - 739

2016 International Renewable and Sustainable Energy Conference (IRSEC)

The main of this work is to analyze the performance of a wood solar dryer functioning under a Moroccan climate. A mathematical model based on actual climate data of Rabat city is used to investigate theoretically the drying wood process. The influence of the principal operating parameters (wood thickness, wood density, air temperature and air velocity) on the drying time is studied. The results obtained...

article

Modeling of coupled heat and mass transfer during drying of tropical woods

Merlin Simo-Tagne, Romain Rémond, Yann Rogaume, André Zoulalian, more

International Journal of Thermal Sciences > 2016 > 109 > C > 299-308

We have developed a model on drying of two tropical woods of ayous (Triplochiton Scleroxylon) and frake (Terminalia Superba) coming from Cameroon forests. Some thermophysical parameters used in the model were experimentally obtained in this work while the remaining properties were from literature. A comparison is doing between numerical results of our model, these given by the Luikov’s model and experimental...

article

Kinetic modelling of char gasification by accounting for the evolution of the reactive surface area

André Zoulalian, Roda Bounaceur, Anthony Dufour

Chemical Engineering Science > 2015 > 138 > C > 281-290

In combustion and gasification reactors, solid fuels such as coal or biomass undergo a pyrolysis step to form volatiles and a char. Pyrolysis is combined with an oxidation by O₂, H₂O and/or CO₂ of the resultant char. Here we propose an original approach to model the oxidation of a single char particle. The intrinsic chemical reactivity of the char surface is assessed by the reactive surface area (RSA)...

article

Modelling intra-particle phenomena of biomass pyrolysis

Anthony Dufour, Bajil Ouartassi, Roda Bounaceur, André Zoulalian

Chemical Engineering Research and Design > 2011 > 89 > 10 > 2136-2146

The characteristic times of the main intra particle phenomena of wood pyrolysis are discussed to develop a new model of biomass pyrolysis. The model accounts for a simplified multi-step chemical decomposition with the formation of tars at liquid phase inside the particle. The tars at liquid phase are then competitively converted into a secondary char and gases and evaporated following a Clausius–Clapeyron...

article

A practical approach for modelling and control of biomass pyrolysis pilot plant with heat recovery from combustion of pyrolysis products

Mohamed Ammar Abbassi, Najla Grioui, Kamel Halouani, André Zoulalian, more

Fuel Processing Technology > 2009 > 90 > 10 > 1278-1285

A pilot plant of biomass pyrolysis using pyrolysis products as fuel has been tested and shown to improve energy balance of the process and to be environmentally friendly by avoiding rejection of pyrolysis pollutants fumes into the atmosphere. The high number of parameters involved in a pyrolysis process makes it difficult to specify an optimum procedure for charcoal yield and pyrolysis cycle durability...

article

Mechanisms and Kinetics of Methane Thermal Conversion in a Syngas

Anthony Dufour, Sylvie Valin, Pierre Castelli, Sébastien Thiery, more

Industrial & Engineering Chemistry Research > 2009 > 48 > 14 > 6564 - 6572

article

Comparison of gasification and pyrolysis of thermal pre-treated wood board waste

Pierre Girods, Anthony Dufour, Yann Rogaume, Caroline Rogaume, more

Journal of Analytical and Applied Pyrolysis > 2009 > 85 > 1-2 > 171-183

The second step of a two-step process of thermo-chemical conversion of wood board waste is discussed in this paper. GC-TCD and FTIR analyses of the gas product enable to compare the two proposed way: pyrolysis and gasification of the pre-treated and virgin wood board sample between 800 and 1000°C. The effect of the first step of the process (low-temperature pyrolysis which aims to remove nitrogen...

article

Introducing an overall mass-transfer coefficient for prediction of drying curves at low-temperature drying rates

Rubén A. Ananias, Eric Mougel, André Zoulalian

Wood Science and Technology > 2009 > 43 > 1-2 > 43-56

The aim of this study is to justify that the drying rate of wood can be represented by a phenomenological model defining a driving force expressed as the difference between the average wood moisture content and the equilibrium wood moisture content. The results show that the mathematical relation proposed is valid when introducing an overall mass transfer coefficient, K, at low temperature wood-drying...

article

Pyrolysis of wood waste containing urea-formaldehyde and melamine-formaldehyde resins

Pierre Girods, Anthony Dufour, Yann Rogaume, Caroline Rogaume, more

Journal of Analytical and Applied Pyrolysis > 2008 > 81 > 1 > 113-120

Nowadays, wood industry produces huge amounts of wood waste containing various additives. Wood waste containing urea-formaldehyde (UF) and melamine-formaldehyde (MF) resins such as particleboard or laminated flooring constitutes a consequent resource of energy. However, this type of waste needs a “refinement” to eliminate nitrogen responsible of the production of pollutants. The pyrolysis of particleboard...

article

Thermochemical modeling of isothermal carbonization of thick wood particle – Effect of reactor temperature and wood particle size

Najla Grioui, Kamel Halouani, André Zoulalian, Foued Halouani

Energy Conversion and Management > 2007 > 48 > 3 > 927-936

A numerical study of isothermal carbonization of thick wood particles has been developed. The proposed model takes into account the heat and mass transfer and chemical kinetics simultaneously. The thermal properties of wood are considered to be linear functions of the local temperature and have been estimated from literature data or by fitting the model with experimental data. The carbonization process...

article

Modeling of a gas catalytic chemical reaction, taking into account the diffusion in the adsorbed phase

Anélie Pétrissans, Mathieu Pétrissans, André Zoulalian

Chemical Engineering Journal > 2006 > 117 > 1 > 31-38

This study is devoted to a chemical reaction, carried out in a gaseous phase under isothermal conditions and without internal convective flow. Traditionally, in the mass-balance equations, the transport of reactants and products in a porous catalyst is introduced by the diffusion phenomenon in gaseous phase. The reaction rate then is written as a function of the reactant's and product's concentrations...

article

Investigations of the reasons for fungal durability of heat-treated beech wood

Mohammed Hakkou, Mathieu Pétrissans, Philippe Gérardin, André Zoulalian

Polymer Degradation and Stability > 2006 > 91 > 2 > 393-397

It is generally accepted that thermal treatment of wood by mild pyrolysis (retification or torrefaction) improves its durability to fungal degradation. However, this property has recently been questioned in the literature and definitely needs further investigation. The increase in durability conferred by thermal treatment is generally explained by four hypotheses: the low affinity of heat-treated...

article

Thermogravimetric analysis and kinetics modeling of isothermal carbonization of olive wood in inert atmosphere

Najla Grioui, Kamel Halouani, André Zoulalian, Foued Halouani

Thermochimica Acta > 2006 > 440 > 1 > 23-30

The kinetics of olive wood carbonization is investigated by means of isothermal thermogravimetric analysis method. Measurements were carried out in a thermobalance for different fixed temperatures between 498 and 648K. A two-stage semi-global kinetic model consisting of four sequential steps was proposed to derive kinetic parameters. The olive wood is classified in three pseudo-components. For the...

article

Experimental study and modelling of mass transfer during simultaneous absorption of SO2 and NO2 with chemical reaction

Susianto, Mathieu Pétrissans, Anélie Pétrissans, André Zoulalian

Chemical Engineering & Processing: Process Intensification > 2005 > 44 > 10 > 1075-1081

The aim of this paper is to model the simultaneous absorption mass transfer of NO ₂ and SO ₂ with chemical reactions. The absorption has been studied at low temperature (25°C) in a gas–liquid stirred tank reactor, open for the gas flow and closed for the liquid phase. The kinetics of the reactions between sulphite and nitrite ions, obtained respectively from the absorption of SO ...

article

Investigation of wood wettability changes during heat treatment on the basis of chemical analysis

Mohammed Hakkou, Mathieu Pétrissans, André Zoulalian, Philippe Gérardin

Polymer Degradation and Stability > 2005 > 89 > 1 > 1-5

Contact angles, measured by Wilelhmy technique, during beech heat treatment by mild pyrolysis under inert atmosphere, indicated a significant increase of wood hydrophobicity for a temperature between 130 and 160°C. This behaviour, generally reported for higher temperatures, has been investigated in terms of chemical modifications and molecular organization of wood biopolymers to understand the reasons...

INFONA - science communication portal

Search results for: André Zoulalian

Convective drying of onion: modeling of drying kinetics parameters

Mathematical modelling and numerical simulation of a simple solar dryer for tropical wood using a collector

Parametric study of a wood solar dryer with glazed walls in a Moroccan climate

Modeling of coupled heat and mass transfer during drying of tropical woods

Kinetic modelling of char gasification by accounting for the evolution of the reactive surface area

Modelling intra-particle phenomena of biomass pyrolysis

A practical approach for modelling and control of biomass pyrolysis pilot plant with heat recovery from combustion of pyrolysis products

Mechanisms and Kinetics of Methane Thermal Conversion in a Syngas

Comparison of gasification and pyrolysis of thermal pre-treated wood board waste

Introducing an overall mass-transfer coefficient for prediction of drying curves at low-temperature drying rates

Pyrolysis of wood waste containing urea-formaldehyde and melamine-formaldehyde resins

Thermochemical modeling of isothermal carbonization of thick wood particle – Effect of reactor temperature and wood particle size

Modeling of a gas catalytic chemical reaction, taking into account the diffusion in the adsorbed phase

Investigations of the reasons for fungal durability of heat-treated beech wood

Thermogravimetric analysis and kinetics modeling of isothermal carbonization of olive wood in inert atmosphere

Experimental study and modelling of mass transfer during simultaneous absorption of SO2 and NO2 with chemical reaction

Investigation of wood wettability changes during heat treatment on the basis of chemical analysis

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