Xavier Joulia

Xavier Joulia
Université de Toulouse - INP-ENSIACET · Laboratoire de Génie Chimique (LGC)

PhD, Doctor ès Sciences

About

172
Publications
24,755
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1,778
Citations
Citations since 2016
21 Research Items
634 Citations
2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120
Introduction
Xavier Joulia currently works at the Laboratoire de Génie Chimique (LGC), Université de Toulouse - INP-ENSIACET. Xavier does research in Computer Aided Process Engineering.

Publications

Publications (172)
Article
In the framework of sodium fast reactors, the management of tritium contamination in the sodium secondary circuit and the control of its release into the atmosphere is fundamental. In order to capture and recover tritium by coprecipitation worth hydrogen in cold traps, it is necessary to maintain a certain amount of hydrogen dissolved in the liquid...
Article
Flexible operations design is one of the key challenges of process engineering over the last years. However, even when uncertainty during the design phase is taken into account, the vast majority of research works refer to steady state conditions only, neglecting the system behaviour during the transition from the nominal state to the perturbed one...
Article
The very first step of almost any separation process design is the thermodynamic feasibility analysis. In case of distillation, Residue Curve Maps (RCMs) represent an essential tool to assess whether the separation is feasible or not. However, the analysis is generally carried out by referring to nominal operating conditions and to product purities...
Article
The work deals with the removal by slow pyrolysis of epoxy resin from samples of spent nuclear fuel embedded in this polymer. Beyond the nuclear field, epoxy resin removal by pyrolysis is a typical issue for the recovery of metals in electronic waste. The main objective is to find the optimal conditions to remove hydrogen in the residual solid wast...
Article
Hydrogen permeation through nickel dense membrane applied to Sodium cooled Fast Reactors has been studied theoretically and experimentally. In order to investigate the coupling of nickel membrane with external gas and sodium flows, an analytical model based on mass transfer resistances is developed. A sensitivity analysis showed that, for enough th...
Article
Multicomponent mixtures can be separated into their single components by mean of different distillation system configurations. The typical distillation train design procedure consists of the assessment of the optimal columns configuration according to the economic and operational aspects. However, this optimal design is strictly related to the oper...
Chapter
Residue curve maps (RCMs) are a widely exploited tool to assess whether a multicomponent mixture separation by distillation results to be feasible or not. They usually refer to a given feed composition and to the products purities as specifications; sometimes the whole distillation regions can be discussed in order to evaluate all the mixture possi...
Conference Paper
• Hydrogen introduction inside a liquid sodium loop by permeation through a Nickel membrane • Set up of an experimental facility for the process analysis and validation • Measurement of the stationary hydrogen permeation flux through the membrane • Experimental and modeling approach • Data reconciliation
Conference Paper
Full-text available
Flexibility analysis is a step of process design procedure that is often skipped; sometimes a sensitivity analysis is performed with features similar to the flexibility one but in general they don't overlap. The latter indeed usually has the purpose of assessing the operability range of an already designed system, while the former can be introduced...
Article
The worldwide shared definition of “optimal design” refers to the cheapest and simplest design able to perform the required job; most of the time this definition is strictly related to given operating conditions, i.e. the input variables are seldom subjected to considerable variations. However, in process engineering, plenty of cases don't fit this...
Article
Full-text available
A methodology for the simulation of spirits continuous distillation was developed and applied to the analysis of an Armagnac unit, using the software ProSimPlus®. Distillation data for 66 aroma compounds were acquired during an experimental campaign and 32 of these species were simulated with the NRTL model, using interaction parameters estimated f...
Article
Full-text available
A review of the vapor–liquid equilibrium data of aroma compounds highly diluted in hydroalcoholic mixtures at 101.3 kPa is presented. The study includes 44 aroma compounds present in distilled beverages from seven chemical families: acetals, alcohols, carbonyl compounds, carboxylic acids, esters, furans, and terpenes. The equilibrium data are model...
Article
Full-text available
The present research falls within the scope of the chemical influence of heavy metals on thermochemical conversion of biomass. Specifically, the impact of nickel during pyrolysis and CO2-gasification of willow samples was studied by experimental and thermodynamic approaches. For this purpose, willow wood samples were impregnated with various conten...
Article
Full-text available
A thermodynamic study of the vapor–liquid equilibrium for the ternary system ethyl lactate–ethanol–water was performed at 101.3 kPa and infinite dilution regarding ethyl lactate, for boiling temperatures ranging from (352.3 to 370.0) K. The experimental measurements were carried out with a recirculation still and the equilibrium compositions of eth...
Article
Full-text available
To study its catalytic effect, nickel were inserted intentionally by impregnation into the biomass. In this context, the influence of the Ni amount in the solution during wood impregnation has been analyzed in terms not only of catalytic activity and samples compositions but also on the wood structure. Willow was impregnated with different concentr...
Chapter
This paper presents the modeling of a bench-scale reactor for the pyrolysis of epoxy resin containing nuclear fuel samples. Strict operating conditions must be met to avoid nuclear fuel oxidation and the final hydrogen content in the residual char must be close to zero. By using the finite element method software, COMSOL Multiphysics®, transport ph...
Article
Full-text available
Waste such as contaminated biomass, which contain potentially high level of heavy metals, are widely available resources. One of the drawbacks of using this biomass in gasification processes is that some heavy metals might be transferred in the produced syngas, and requires then specific further cleaning steps. Thermodynamic equilibrium calculation...
Article
Full-text available
In the framework of tritium recovery from tritiated water, efficiency of packed bed membrane reactors have been successfully demonstrated. Thanks to protium isotope swamping, tritium bonded water can be recovered under the valuable Q2 form (Q = H, D or T) by means of isotope exchange reactions occurring on catalyst surface. The use of permselective...
Article
Full-text available
The thermal degradation behavior of a commercial epoxy resin, EpoFix® (Struers), has been investigated by thermogravimetry (TG), differential thermal gravimetry (DTG), and differential thermal analysis (DTA) under nonisothermal conditions in an argon atmosphere. Different methods (Kissinger, Flynn–Wall–Ozawa (FWO), Friedman isoconversion methods, a...
Article
This paper presents the results of a parametric study done on a single stage finger-type packed-bed membrane reactor (PBMR) used for heavy water vapor dedeuteration. Thanks to mass spectrometer analysis of streams leaving the PBMR, speciation of deuterated species was achieved Measurement of the amounts of each molecular component allowed the calcu...
Article
Full-text available
Within the framework of the dismantling of fast breeder reactors in France (PHENIX, SUPERPHENIX, RAPSODIE), several processes are under investigation regarding sodium disposal. One of them, called ELA (radioactive sodium waste treatment process), is based on the implementation of the sodium-water reaction, in a controlled and progressive way, to re...
Chapter
The separation of a binary heteroazeotropic mixture (1-butanol - water) by batch distillation is studied in a new Double-Column System (DCS) by pilot plant experiments and dynamic simulation performed with a professional flowsheet simulator. The DCS is operated in closed mode. At the end of the process products of high purity were obtained with hig...
Article
Full-text available
Operating a Sodium Fast Reactor (SFR) in reliable and safe conditions requires mastering the quality of the sodium fluid coolant, regarding oxygen and hydrogen impurities contents. A cold trap is a purification unit in SFR, designed to maintain oxygen and hydrogen contents within acceptable limits. The purification of these impurities is based on c...
Conference Paper
Industrial sectors account for one third of global energy consumption. A common feature of industrial processes is reliance on fossil fuels as the primary source of energy, where a large part of the energy consumption is spent on production of utilities (electricity, steam at various pressure levels, hot/cold water, hot flue gas…). As this reliance...
Conference Paper
Citrus peeling distillation is known to lead to high quality fragrances. However, the compounds responsible for the odour of the bitter orange (Citrus aurantium L.) distillate are poorly known. Moreover, the technological parameters that could affect the composition of the distillate are not well understood. The aim of this study was to focus on ke...
Article
The aim of this study was to check the ability of ProSim® software to model both continuous and batch distillations of two specific industrial units in order to obtain both a better understanding of the behaviour of aroma volatile components and a tool to optimise the still's operation. Simulations of multistage continuous distillation to produce n...
Article
Tritium waste recycling is a real economic and ecological issue. Generally under the non-valuable Q2O form (Q = H, D or T), waste can be converted into fuel Q2 for a fusion machine (e.g. JET, ITER) by isotope exchange reaction Q2O + H2 = H2O + Q2. Such a reaction is carried out over Ni-based catalyst bed packed in a thin wall hydrogen permselective...
Article
Full-text available
This work addresses the integrated design of the high temperature steam electrolysis (HTSE) and biomass to liquid (BtL) hybrid process. The comprehensive gate-to-gate analysis includes BtL and hydrogen production on-site operations. Simulations are carried out using commercial process simulation software—ProSimPlus—to allow physical modeling as wel...
Chapter
In order to operate in reliable and safe conditions a Sodium Fast Reactor, it is necessary to master the quality of the sodium fluid coolant, in particular with oxygen and hydrogen impurities contents. This can be performed by a purification system named cold trap. This article deals with the modelling of impurities crystallization in a cold trap a...
Chapter
This work addresses the integrated design of the High Temperature Steam Electrolysis (HTSE) and Biomass to Liquid (BtL) hybrid process.The comprehensive gate-to-gate analysis includes BtL and hydrogen production on-site operations. Simulations are carried out using a commercial process simulation software - ProSimPlus® - to allow physical modeling...
Article
A multi-objective genetic algorithm with constraints is used to obtain the Pareto front of heterogeneous azeotropic batch distillation (HABD). Genetic algorithm (NSGA-II) real- coded in MATLAB is coupled to a commercial simulator ProSim Batch for performing a constrained optimization of two objective functions: economical profit and thermodynamic e...
Article
Full-text available
In this work, experimental vapor–liquid equilibria (VLE) of water + ethanol + five aroma compound (two monoterpene hydrocarbons, α-pinene and d-limonene, and three oxygenated compounds, linalool, citral, and linalool oxide) mixtures were measured at boiling point at 101.3 kPa for ethanol molar fractions ranging from 0.0140 to 0.8389. The five aroma...
Conference Paper
P. Baudet, O. Baudouin, S. Déchelotte, P. Floquet, A. Ghannadzadeh, X. Joulia, R. Thery-Hetreux, B. Wincure, Exergy Analysis within Process Simulation Software to Enhance Process Energy Management, 26th European Symposium on Applied Thermodynamics, 6-10 Oct. 2012, Potsdam, Germany.
Article
This paper presents a general methodology for exergy balance in chemical and thermal processes integrated in ProSimPlus® as a well-adapted process simulator for energy efficiency analysis. In this work, as well as using the general expressions for heat and work streams, the whole exergy balance is presented within only one software in order to full...
Article
Full-text available
A new approach for the feasibility analysis of reactive distillation processes based on the reactive extractive curve maps (rExCM) concept is introduced. A method dedicated to reactive distillation feasibility analysis, and design has been developed in our team since 1999. From minimal information concerning the physicochemical properties of the sy...
Article
Full-text available
communication à vocation pédagogique
Article
This article presents a methodology for checking the existence of the azeotrope and computing its composition, density, and pressure at a given temperature by integrating chemical engineering insights with molecular simulation principles. Liquid-vapor equilibrium points are computed by molecular simulations using the Gibbs ensemble Monte Carlo (GEM...
Conference Paper
R. Thery-Hetreux, P. Floquet, A. Ghannadzadeh, N. Raimondi, O. Baudouin, X. Joulia. Toward an Approach Combining Exergy Analysis and Pinch Analysis for Improving the Energy Efficiency of Industrial Sites, Computer-Aided Process Engineering Forum, 26–28 Mar. 2012, Veszprem, Hungary.
Article
We study the separation of the minimum homoazeotropic mixture isopropanol-water by applying cyclohexane and n-hexane as entrainer in a new Generalised Double-Column batch heteroazeotropic distillation System (GDCS). This configuration has three further operation parameters to the original Double-Column System (DCS; Denes et al. (2009) [1]). They gi...
Article
We study the separation of the minimum homoazeotrope isopropanol - water by applying cyclohexane as entrainer in a new Generalised Double-Column batch heteroazeotropic distillation System (GDCS). First its feasibility is studied by a simplified method then we did sensitivity analysis by rigorous simulation. The minimum duration is determined for th...
Article
A WebLab is an experiment operated remotely via Internet. Besides the strictly technical aspects of such an experiment, which may contribute to the learning of Chemical Engineering fundamentals, there is also important feedback when teams of students of two different countries are working together: the WebLab becomes an intercultural experience, en...
Conference Paper
The dynamic simulation of concentrating solar plants is examined to define a reasonable simplified layout and to highlight the main issues in characterizing the process dynamics of these systems. The dynamic simulation is a key-tool to improve the performances and the life-cycle of the concentrating solar plants. A more detailed dynamic simulation...
Article
A multi-objective genetic algorithm with constraints is used to obtain the Pareto front of heterogeneous extractive batch distillation (HEBD). Genetic algorithm (NSGA-II) real-coded in MATLAB is coupled to a commercial simulator ProSim Batch to consider optimization variables related to the energy consumption of the process. Illustration is done by...
Conference Paper
A. Ghannadzadeh, R. Thery-Hetreux, N. Raimondi, P. Floquet, O. Baudouin, B. Abou Khalil, P. Baudet, X. Joulia, Toward an Approach Combining Exergy Analysis and Pinch Analysis for Improving the Energy Efficiency of Industrial Sites: Application to a Pulp and Paper Process, Société Française de Génie des Procédés (SFGP) 2011, 29 Nov. - 1 Dec. 2011, L...
Article
Heterogeneous extractive batch distillation of the chloroform – methanol minimum boiling temperature azeotropic mixture is studied with water as a heterogeneous entrainer. The continuous feeding of water allows recovering 99%molar chloroform after condensation of the saddle binary heteroazeotrope water –chloroform. Unlike a homogeneous process, the...
Conference Paper
A. Ghannadzadeh, R. Thery-Hetreux, O. Baudouin, P. Baudet, P. Floquet, X. Joulia, Une Approche Générique pour la Réalisation de Bilans Exergétiques dans un Simulateur de Procédés, Les Outils de la Thermodynamique des Fluides et de la Thermodynamique Energétique, 6 Jan. 2011, Nancy, France.
Conference Paper
A. Ghannadzadeh, R. Thery-Hetreux, O. Baudouin, P. Baudet, P. Floquet, X. Joulia, General Methodology for Exergy Balance in a Process Simulator, 21st European Symposium on Computer Aided Process Engineering, 29 May - 1 Jun. 2011, Chalkidiki, Greece.
Article
This paper considers the optimisation of batch extractive distillation, using heterogeneous entrainers for the first time. The objective function includes the maximum of overall profit and the optimisation variables are the entrainer flowrate and the reflux ratio that is an optimal combination of both decanted phases. Simulation and optimization is...
Article
Full-text available
In this work, a flexible model, built from elementary modules, is developed for an industrial waste gasification process, in an industrial moving bed reactor located in Morcenx (France). This gasifier is able to treat more than 46,875 ton/year of RDF (Refuse Derived Fuel) waste for producing 12 MW. Drying, pyrolysis, combustion / gasification and p...
Article
This paper deals with the feasibility analysis of batch extractive distillation taking into account the effect of the univolatility lines ai,j = 1 and the shape of residue curves for ternary mixtures involving two binary azeotropes. A general feasibility criterion previously established for ternary mixtures only including one azeotrope is now exten...
Article
The present work focuses on the thermodynamic modeling of the Bunsen section of the Iodine-Sulfur thermochemical cycle for hydrogen production on the basis of a combination of UNIQUAC activity coefficient and solvation models. The complexity of the material system, two immiscible electrolyte aqueous phases (H2SO4 rich and HI rich), is managed by de...
Article
A model for steady-state simulation in 3D of a Core-in-Drum plate-fin heat exchanger is presented in this paper. The model takes into account both the geometrical description of the PFHE, layer by layer, and the description of the external piping layout of each stream outside the core. Several steps that allow to define the entire Core-in-Drum mode...
Article
Computer-Aided Mixture Design for product development can take advantage from equilibrium modelling. Systems composed by triacylglycerols (TAG) mixtures are widely used for many applications (foods, cosmetics, pharmaceutical and lubricants) and their end-use properties are very close related to phase behaviour (melting and crystallization). Such mo...
Article
A summary about our experiences in the introduction of heterogeneous entrainers in azeotropic and extractive batch distillation is presented in this work. Essential advantages of the application of heterogeneous entrainers are showed by rigorous simulation and experimental verification in a bench batch distillation column for separating several aze...
Article
A new double column system (DCS) operated in closed mode is suggested for heterogeneous batch distillation. This configuration is investigated by feasibility studies based on the assumption of maximal separation and is compared with the traditional batch rectifier (BR). We study the configurations also by dynamic simulation based on a detailed mode...
Article
A model for the Bunsen section of the Sulfur–Iodine thermo-chemical cycle is proposed, where sulfur dioxide reacts with excess water and iodine to produce two demixing liquid aqueous phases (H2SO4 rich and HI rich) in equilibrium. Considering the mild temperature and pressure conditions, the UNIQUAC activity coefficient model combined with Engels'...
Article
All former studies reported that the separation of the low relative volatility binary mixture by using a heavy entrainer in a batch rectifier imposed the obligatory withdrawal of the most volatile original component. In this paper, we demonstrate that this does not always happen and that the product sequence can be unambiguously determined from the...
Article
Within the TINA (Transient Integrated Network Analysis) research project and in partnership with Total, IFP is developing a new generation of simulation tool for flow assurance studies. This integrated simulation software will be able to perform multiphase simulations from the wellbore to the surface facilities. The purpose of this paper is to defi...
Article
Full-text available
Feasibility assessment of batch homogeneous extractive distillation for the separation of an A-B mixture feeding entrainer E traditionally relies on the systematic computation of rectifying and extractive composition profile maps under various reflux ratio and entrainer flowrate conditions. This is a well-settled methodology for determining the pro...