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Papers by Florent Bourgeois
HAL (Le Centre pour la Communication Scientifique Directe), Oct 10, 2022
Dans le domaine des risques industriels, l'évaluation quantitative de l'occurrence des événements... more Dans le domaine des risques industriels, l'évaluation quantitative de l'occurrence des événements redoutés et des phénomènes dangereux est devenue incontournable. La méthode du noeud-papillon, combinaison des arbres de défaillances et d'événements, est largement utilisée et constitue un outil pour la prise de décisions. Cette technique, dans sa déclinaison actuelle, ne considère pas les incertitudes liées aux paramètres d'entrée qui déterminent cependant la variabilité des résultats. Notre étude propose une méthodologie d'analyse probabiliste du noeud-papillon prenant en compte les incertitudes sur les taux de défaillance d'équipements et les erreurs humaines. Cette approche est présentée et est appliquée à un cas d'étude industriel simple. L'intérêt de la prise en compte des incertitudes dans la quantification des risques est démontré en ce qui concerne les prises de décisions notamment pour les investissements en matière de barrières de sécurité. Mots-clefs-méthode du noeud-papillon, incertitudes, risque industriel, probabilités, simulation Monte-Carlo
HAL (Le Centre pour la Communication Scientifique Directe), Nov 7, 2022
Journal of Supercritical Fluids, Jul 1, 2023
Food Additives & Contaminants: Part A, Jul 1, 2012
Many countries receive shipments of bulk cereals from primary producers. There is a volume of wor... more Many countries receive shipments of bulk cereals from primary producers. There is a volume of work that is ongoing that seeks to arrive at appropriate standards for the quality of the shipments and the means to assess the shipments as they are out-loaded. Of concern are mycotoxin and heavy metal levels, pesticide and herbicide residue levels and http://mc.manuscriptcentral.com/tfac Email:
Florent Bourgeois, professeur à l'INP et chercheur au Laboratoire de Génie Chimique à Toulous... more Florent Bourgeois, professeur à l'INP et chercheur au Laboratoire de Génie Chimique à Toulouse, présente le projet Carboscories. Par la voie de la carbonatation minérale, ce projet vise à capter du CO2 dans un déchet industriel, adressant simultanément la réduction de deux enjeux environnementaux : les émissions importantes de CO2 et les grands volumes de scories de nickel produites et non valorisées en Nouvelle-Calédonie
The population balance concept has provided a useful framework for the description of the operati... more The population balance concept has provided a useful framework for the description of the operating behavior of the ball mill. This approach finds expression in the so-called selection breakage function model for batch and continuous mills. This model produces veru good descriptions of the size distribution of the products from ball milling operations and the model is very useful for the description of batch and continuous mills and, when combined with models for classifiers and other unit operations, provides a solid basis for flowsheet simulation procedures. The breakage and selection function model is essentially descriptive and not predictive because the parameters in the model cannot as yet be related to the fundamental material properties of the material that is broken and to the fracture mechanics that govern the comminution of brittle particulate material during the rapid impact and compression events that occur with high frequency in a ball mill. The population balance approach smears over the individual processes and regards the ball mill as a continuum with breakage occurring continuously in time and space. New experimental techniques, particularly the adaptation of the Hopkinson bar as the ultrafast load cell (UFLC) to the problem of observing the extremely rapid impact fracture of particulate solids, have made it possible to make accurate and consistent measurements of aprticle strength, particle fracture energy and the single-impact breakage function. These quantitative measurements have been incorporated into a new conceptual model of the description of the ball mill. The model is based on identifying events that give rise to particle breakage, and using the fundamental experimental data obtained on the UFLC and other single-particle fracture tests, the probabilities of these events can be independently determined. The distribution of impact energies that occur in the ball mill has been established by discrete element simulation of the media motion. The probabilistic description of the individual fracture events and the description of impact energies are combined to make a priori predictions of ball mill performance under a variety of operating conditions. The new model is used to calculate the selection and breakage functions for quartz in a small batch mill.
HAL (Le Centre pour la Communication Scientifique Directe), 2010
Size and objects 1 nm 10 nm 100 nm 1 µm 10 µm 100 µm atoms/ ions molecules macromolecules/ polyme... more Size and objects 1 nm 10 nm 100 nm 1 µm 10 µm 100 µm atoms/ ions molecules macromolecules/ polymers microparticles macroparticles nanoparticles
Minerals Engineering
Thermo-kinetic modelling of the acidic leaching of anorthosite: Key learnings toward the concepti... more Thermo-kinetic modelling of the acidic leaching of anorthosite: Key learnings toward the conception of a sustainable industrial process. (2022) Minerals Engineering, 180. 107500.
HAL (Le Centre pour la Communication Scientifique Directe), 2022
HAL (Le Centre pour la Communication Scientifique Directe), 2003
Environnement & technique, 2005
CNRT *Nickel et son environnement*, Apr 1, 2015
The formation of passivation layers is the major obstacle to the development of direct aqueous mi... more The formation of passivation layers is the major obstacle to the development of direct aqueous mineral carbonation of magnesium silicates, one of the most promising routes for large-scale CO2 mitigation. This observation has led to considerable research efforts to prevent the formation of these layers and/or to exfoliate them continuously during the reaction. This keynote gives an account of different solutions investigated by a French research consortium initiated within the framework of several collaborative projects, including the methodology developed to optimize process efficiency and cost. Chemical-based solutions using chelating agents were first examined, but the variety of minerals and also the complex nature of leached surface layers for a given ore demonstrated the need for highly versatile and tunable chemical systems (able to modulate the precipitation of silica or phyllosilicates without sequestrating alkaline metals) and thus the need for a more robust solution. Movin...
The direct aqueous attrition-leaching process is an under development mineralization process prop... more The direct aqueous attrition-leaching process is an under development mineralization process proposed by the authors (Julcour et al., 2014, Chem. Eng. J., 262, 716-726). It was conceived as a robust additive-free means to overcome the formation of passivation layers at the surface of leached particles, which is a severe impediment to direct aqueous mineralization. It merges the leaching conditions necessary to process Mg, Ca or Fe bearing materials with the attrition efficiency of a stirred media mill, a process that is scalable to handle large industrial throughputs commensurate with mitigation of CO2 emissions. Up to this day, the attrition-leaching process has been validated under a CO2 partial pressure of 20 bars and a temperature of 180 °C to produce stable carbonate solid phases. Starting with minus 100 μm particles, the process has demonstrated a carbonation efficiency in excess of 80 % for a variety of natural silicate ores and mining wastes. With the initial batch process b...
Dans le domaine de l’hydrometallurgie, le developpement d’un procede de lixiviation du minerai de... more Dans le domaine de l’hydrometallurgie, le developpement d’un procede de lixiviation du minerai de chalcopyrite, CuFeS2, revet une importance industrielle majeure. Comme pour d’autres minerais, son efficacite est limitee par la formation de couches de surface solides, qui ralentissent ou bloquent la dissolution. De multiples etudes ont ete menees pour identifier la nature des couches passivantes et les conditions operatoires qui favorisent leur formation, mais de nombreuses inconnues et contradictions persistent. Dans le but de voir s’il existe une fenetre operatoire industriellement exploitable pour traiter la chalcopyrite en voie aqueuse, une methodologie sur la modelisation thermodynamique de la lixiviation est en cours de developpement. Cet article en presente les articulations principales. Le travail realise a permis d’identifier quelques points cles, dont certains sont discutes dans le texte. En croisant deux outils de simulation d’equilibres thermodynamiques, PhreeqC et FactSa...
Le theme de la gestion rationnelle des ressources en eau represente un enjeu majeur pour l'in... more Le theme de la gestion rationnelle des ressources en eau represente un enjeu majeur pour l'industrie francaise des granulats. Elle comprend un double objectif, celui de satisfaire les besoins de production en eau etde minimiser l'impact sur la ressource eau.
HAL (Le Centre pour la Communication Scientifique Directe), Oct 10, 2022
Dans le domaine des risques industriels, l'évaluation quantitative de l'occurrence des événements... more Dans le domaine des risques industriels, l'évaluation quantitative de l'occurrence des événements redoutés et des phénomènes dangereux est devenue incontournable. La méthode du noeud-papillon, combinaison des arbres de défaillances et d'événements, est largement utilisée et constitue un outil pour la prise de décisions. Cette technique, dans sa déclinaison actuelle, ne considère pas les incertitudes liées aux paramètres d'entrée qui déterminent cependant la variabilité des résultats. Notre étude propose une méthodologie d'analyse probabiliste du noeud-papillon prenant en compte les incertitudes sur les taux de défaillance d'équipements et les erreurs humaines. Cette approche est présentée et est appliquée à un cas d'étude industriel simple. L'intérêt de la prise en compte des incertitudes dans la quantification des risques est démontré en ce qui concerne les prises de décisions notamment pour les investissements en matière de barrières de sécurité. Mots-clefs-méthode du noeud-papillon, incertitudes, risque industriel, probabilités, simulation Monte-Carlo
HAL (Le Centre pour la Communication Scientifique Directe), Nov 7, 2022
Journal of Supercritical Fluids, Jul 1, 2023
Food Additives & Contaminants: Part A, Jul 1, 2012
Many countries receive shipments of bulk cereals from primary producers. There is a volume of wor... more Many countries receive shipments of bulk cereals from primary producers. There is a volume of work that is ongoing that seeks to arrive at appropriate standards for the quality of the shipments and the means to assess the shipments as they are out-loaded. Of concern are mycotoxin and heavy metal levels, pesticide and herbicide residue levels and http://mc.manuscriptcentral.com/tfac Email:
Florent Bourgeois, professeur à l'INP et chercheur au Laboratoire de Génie Chimique à Toulous... more Florent Bourgeois, professeur à l'INP et chercheur au Laboratoire de Génie Chimique à Toulouse, présente le projet Carboscories. Par la voie de la carbonatation minérale, ce projet vise à capter du CO2 dans un déchet industriel, adressant simultanément la réduction de deux enjeux environnementaux : les émissions importantes de CO2 et les grands volumes de scories de nickel produites et non valorisées en Nouvelle-Calédonie
The population balance concept has provided a useful framework for the description of the operati... more The population balance concept has provided a useful framework for the description of the operating behavior of the ball mill. This approach finds expression in the so-called selection breakage function model for batch and continuous mills. This model produces veru good descriptions of the size distribution of the products from ball milling operations and the model is very useful for the description of batch and continuous mills and, when combined with models for classifiers and other unit operations, provides a solid basis for flowsheet simulation procedures. The breakage and selection function model is essentially descriptive and not predictive because the parameters in the model cannot as yet be related to the fundamental material properties of the material that is broken and to the fracture mechanics that govern the comminution of brittle particulate material during the rapid impact and compression events that occur with high frequency in a ball mill. The population balance approach smears over the individual processes and regards the ball mill as a continuum with breakage occurring continuously in time and space. New experimental techniques, particularly the adaptation of the Hopkinson bar as the ultrafast load cell (UFLC) to the problem of observing the extremely rapid impact fracture of particulate solids, have made it possible to make accurate and consistent measurements of aprticle strength, particle fracture energy and the single-impact breakage function. These quantitative measurements have been incorporated into a new conceptual model of the description of the ball mill. The model is based on identifying events that give rise to particle breakage, and using the fundamental experimental data obtained on the UFLC and other single-particle fracture tests, the probabilities of these events can be independently determined. The distribution of impact energies that occur in the ball mill has been established by discrete element simulation of the media motion. The probabilistic description of the individual fracture events and the description of impact energies are combined to make a priori predictions of ball mill performance under a variety of operating conditions. The new model is used to calculate the selection and breakage functions for quartz in a small batch mill.
HAL (Le Centre pour la Communication Scientifique Directe), 2010
Size and objects 1 nm 10 nm 100 nm 1 µm 10 µm 100 µm atoms/ ions molecules macromolecules/ polyme... more Size and objects 1 nm 10 nm 100 nm 1 µm 10 µm 100 µm atoms/ ions molecules macromolecules/ polymers microparticles macroparticles nanoparticles
Minerals Engineering
Thermo-kinetic modelling of the acidic leaching of anorthosite: Key learnings toward the concepti... more Thermo-kinetic modelling of the acidic leaching of anorthosite: Key learnings toward the conception of a sustainable industrial process. (2022) Minerals Engineering, 180. 107500.
HAL (Le Centre pour la Communication Scientifique Directe), 2022
HAL (Le Centre pour la Communication Scientifique Directe), 2003
Environnement & technique, 2005
CNRT *Nickel et son environnement*, Apr 1, 2015
The formation of passivation layers is the major obstacle to the development of direct aqueous mi... more The formation of passivation layers is the major obstacle to the development of direct aqueous mineral carbonation of magnesium silicates, one of the most promising routes for large-scale CO2 mitigation. This observation has led to considerable research efforts to prevent the formation of these layers and/or to exfoliate them continuously during the reaction. This keynote gives an account of different solutions investigated by a French research consortium initiated within the framework of several collaborative projects, including the methodology developed to optimize process efficiency and cost. Chemical-based solutions using chelating agents were first examined, but the variety of minerals and also the complex nature of leached surface layers for a given ore demonstrated the need for highly versatile and tunable chemical systems (able to modulate the precipitation of silica or phyllosilicates without sequestrating alkaline metals) and thus the need for a more robust solution. Movin...
The direct aqueous attrition-leaching process is an under development mineralization process prop... more The direct aqueous attrition-leaching process is an under development mineralization process proposed by the authors (Julcour et al., 2014, Chem. Eng. J., 262, 716-726). It was conceived as a robust additive-free means to overcome the formation of passivation layers at the surface of leached particles, which is a severe impediment to direct aqueous mineralization. It merges the leaching conditions necessary to process Mg, Ca or Fe bearing materials with the attrition efficiency of a stirred media mill, a process that is scalable to handle large industrial throughputs commensurate with mitigation of CO2 emissions. Up to this day, the attrition-leaching process has been validated under a CO2 partial pressure of 20 bars and a temperature of 180 °C to produce stable carbonate solid phases. Starting with minus 100 μm particles, the process has demonstrated a carbonation efficiency in excess of 80 % for a variety of natural silicate ores and mining wastes. With the initial batch process b...
Dans le domaine de l’hydrometallurgie, le developpement d’un procede de lixiviation du minerai de... more Dans le domaine de l’hydrometallurgie, le developpement d’un procede de lixiviation du minerai de chalcopyrite, CuFeS2, revet une importance industrielle majeure. Comme pour d’autres minerais, son efficacite est limitee par la formation de couches de surface solides, qui ralentissent ou bloquent la dissolution. De multiples etudes ont ete menees pour identifier la nature des couches passivantes et les conditions operatoires qui favorisent leur formation, mais de nombreuses inconnues et contradictions persistent. Dans le but de voir s’il existe une fenetre operatoire industriellement exploitable pour traiter la chalcopyrite en voie aqueuse, une methodologie sur la modelisation thermodynamique de la lixiviation est en cours de developpement. Cet article en presente les articulations principales. Le travail realise a permis d’identifier quelques points cles, dont certains sont discutes dans le texte. En croisant deux outils de simulation d’equilibres thermodynamiques, PhreeqC et FactSa...
Le theme de la gestion rationnelle des ressources en eau represente un enjeu majeur pour l'in... more Le theme de la gestion rationnelle des ressources en eau represente un enjeu majeur pour l'industrie francaise des granulats. Elle comprend un double objectif, celui de satisfaire les besoins de production en eau etde minimiser l'impact sur la ressource eau.