jean-francois Largeau

jean-francois Largeau
Institut Mines-Télécom | telecom-sudparis.eu · Département Systèmes Énergétiques et Environnement

PhD

About

24
Publications
6,340
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320
Citations
Citations since 2017
10 Research Items
143 Citations
2017201820192020202120222023051015202530
2017201820192020202120222023051015202530
2017201820192020202120222023051015202530
2017201820192020202120222023051015202530

Publications

Publications (24)
Article
It remains challenging to produce new and efficient adsorbents to remove sulfur compounds from waste tire pyrolysis oils. The present work investigated the ex-situ treatment by desulfurization and cracking of volatiles from the pyrolysis of waste tires using an innovative synthetic oil mixture. For this purpose, biochars from the pyrolysis of abund...
Article
Full-text available
In this paper, the aim is to avoid clogging and fouling of the equipment, by transforming the tars into lighter gas molecules and thus increasing the yield of pyrolytic gas. Thus, a thermal conversion of a tar model, toluene, in a fixed bed of two biochar prepared in the lab (spent coffee ground char (SCG-C) and date stone char (DS-C)) was studied....
Article
Full-text available
Thermal pyrolysis of scrap truck tires was carried out in a semi-batch fixed reactor at 500 °C. The pyrolysis mechanism and product yields were investigated in this study. We aimed to elucidate the effects of key parameters including the evolution of intern reactor temperature, volatile products residence time and reactor free volume on the quantit...
Article
In the current study, artificial neural network (ANN) and modified Gompertz equation (MG) were applied to develop integrated based models for the prediction of cumulative biogas and methane yield (CBY and CMY) from anaerobic digestion (AD) of several organic wastes. Volatile solid to total solid ratio (VS/TS), carbon content (C), carbon-to-nitrogen...
Article
Full-text available
Oil sludge (OS) has been of key concern due to its continuing effect on the environment degradation. The huge quantities thrown yearly of this waste contain a high proportion of hydrocarbons which are valuable for recovery. This study focused on the oil sludge conversion into a fuel for a diesel engine by thermal/catalytic pyrolysis process. The ex...
Article
The elimination of sulfur compounds in the FCC gasoline is indispensable to protect downstream equipment. Researchers are trying to find technological innovations to produce the famous “zero sulfur” fuel. Many adsorbents, such as spent coffee grounds-derived carbon (SCG-AC), have been claimed to be effective in H2S removal. However, no study has be...
Poster
Full-text available
L'environnement est agressé par beaucoup d'industries notamment : les pétrolières, comme le forage, la production, le transport, le stockage, et le raffinage, générant des quantités considérables de déchets huileux dangereux. En Algérie, les raffineries représentent la source majeure de ces déchets. La boue pétrolière (BP), est le déchet huileux le...
Conference Paper
L’un des verrous de développement industriel de la technologie de gazéification de la biomasse est la formation des goudrons, qui sont des composés organiques lourds à l'exclusion des hydrocarbures gazeux (C1-C6) et le benzène. En effet, les goudrons imposent de sérieuses limitations d'utilisation du fait de l'encrassement du procédé, de l'usure de...
Conference Paper
The air flow over a rotating blade in the form of a Vertical Axis Wind Turbine (VAWT) is known to be complex, often unsteady, encounters interference and is difficult to predict. A good understanding of VAWT aerodynamics in the form of empirical models based on Blade Element Momentum (BEM) theory, CFD in the form of Large Eddy Simulations (LES), Mo...
Article
Laboratory measurements of wall pressure fluctuations and aerodynamic fields were made in separated flows over a forward facing step (h = 30, 40 and 50mm with U e =15–40m/s). An array of 16 off-set pressure probes extending in the streamwise and the spanwise directions was especially developed for sensing the wall pressure fluctuations. The flow f...
Article
Full-text available
Turbulent inflow condition generation for large eddy simulation (LES) was investigated using a purely numerical approach, based on 3D direct numerical simulation (DNS). The inflow condition generation methodology was only tested and validated on a specific flow test case. The purely numerical approach showed that the inflow condition generation met...
Conference Paper
Due to the difficulty of specifying realistic inflow conditions for numerical simulations, a new method has been recently developed permitting to use time-dependent highly turbulent velocity field as inflow condition for spatially developing Large Eddy Simulation. This methodology is based on experimental time histories obtained at few selected ref...
Article
Full-text available
A method for generating realistic (i.e., reproducing in space and time the large-scale coherence of the flows) inflow conditions based on two-point statistics and stochastic estimation is presented. The method is based on proper orthogonal decomposition and linear stochastic estimation. This method allows a realistic representation with a minimum o...
Article
A method for generating realistic (i.e. reproducing in space and time the large-scale coherence of the flows) inflow conditions based on two-point statistics and stochas-tic estimation is presented. The method is based on Proper Orthogonal Decomposition and Linear Stochastic Estimation. This method allows for a realistic representation with a minim...
Conference Paper
Full-text available
A method for generating realistic (i.e. reproducing in space and time the large-scale coherence of the flows) inflow conditions based on two-point statistics and stochas-tic estimation is presented. The method is based on Proper Orthogonal Decomposition and Linear Stochastic Estimation. This method allows for a realistic representation with a minim...

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Projects

Projects (2)
Project
The aim of this thesis is to set up a process for manufacturing catalysts supported on different raw materials based on residues: clays, date kernels ... Then, these catalysts will be tested at laboratory scale then pilot scale for the improvement of the quality of liquid fuels resulting from the pyrolysis of used tires. A modeling of the kinetics of the system can be envisaged.
Project
reduce the production of tar increase the high heating value of gas produced by pyrolysis