{"id":{"repo_id":"sherbrooke","oai_identifier":"oai:usherbrooke.scholaris.ca:11143/1454"},"canonical_url":"https://search.dev.ndltd.org/etd/sherbrooke/oai:usherbrooke.scholaris.ca:11143/1454","repository":{"repo_id":"sherbrooke","name":"Université de Sherbrooke","base_url":"https://usherbrooke.scholaris.ca/server/oai/request"},"display":{"title":"Synthèse de nanoparticules de carbure de fer dans un réacteur à plasma inductif","abstract":"In this study nanometric iron carbide particles were produced by using an induction thermal plasma reactor. There are several applications for iron carbide particles in research and industry, such as in ferrofluids, magnetic recording and biosensors. We are focused in this project on its application as catalyst for Fischer-Tropsch reaction. Two different injection methods were used in this study. Suspension injection was used because of its capability to inject heterogeneous precursors, and solid injection was used to inject reactants with any desired molar ratio. The effect of several process parameters was investigated (plate power, injection rate, probe position, particle size and reactant ratio) and composition and morphology of produced powder were characterized using several characterization techniques including X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Thermogravimetric Analysis (TGA), and specific surface area measurement using BET method. XRD results showed that the produced powder has about 50% of iron carbide alongside other phases such as pure iron, austenite and graphite. SEM and TEM images revealed that nanometric particles with a diameter between 10-50 nm were produced alongside larger particles with diameter between 1 to 3 [micrometer]. High resolution TEM images showed that the produced nanometric particles have a core-shell structure and that they are embedded in an amorphous carbon. A new method has also been developed to collect the produced nanopowder in a liquid in order to minimize nanoparticle dispersion into the air, and protect pyrophoric nanoparticles from air exposure.","abstract_html":"In this study nanometric iron carbide particles were produced by using an induction thermal plasma reactor. There are several applications for iron carbide particles in research and industry, such as in ferrofluids, magnetic recording and biosensors. We are focused in this project on its application as catalyst for Fischer-Tropsch reaction. Two different injection methods were used in this study. Suspension injection was used because of its capability to inject heterogeneous precursors, and solid injection was used to inject reactants with any desired molar ratio. The effect of several process parameters was investigated (plate power, injection rate, probe position, particle size and reactant ratio) and composition and morphology of produced powder were characterized using several characterization techniques including X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Thermogravimetric Analysis (TGA), and specific surface area measurement using BET method. XRD results showed that the produced powder has about 50% of iron carbide alongside other phases such as pure iron, austenite and graphite. SEM and TEM images revealed that nanometric particles with a diameter between 10-50 nm were produced alongside larger particles with diameter between 1 to 3 [micrometer]. High resolution TEM images showed that the produced nanometric particles have a core-shell structure and that they are embedded in an amorphous carbon. A new method has also been developed to collect the produced nanopowder in a liquid in order to minimize nanoparticle dispersion into the air, and protect pyrophoric nanoparticles from air exposure.","abstract_has_math":false,"creators":["Eslahpazir Esfandabadi, Roham"],"institution":"Université de Sherbrooke","degree_name":"M. Sc. A.","degree_level":"Maîtrise","degree_discipline":"Génie chimique","degree_department":null,"school":null,"contributors":[],"advisors":["Gitzhofer, François","Abatzoglou, Nicolas"],"committee_chairs":[],"committee_members":[],"year":2009,"date_issued":"2009","date_published":"2009","updated_at":"2026-07-27T21:07:28Z","subjects":["Catalyseur","Réaction Fischer-Tropsch","Injection de suspension","Carbure de fer","Nanoparticules","Plasma inductif"],"languages":["en"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/11143/1454","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Gitzhofer, François","Abatzoglou, Nicolas"]},{"key":"dc:creator","label":"Author","values":["Eslahpazir Esfandabadi, Roham"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2014-05-14T19:52:04Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2014-05-14T19:52:04Z"]},{"key":"dc:date.issued","label":"Date","values":["2009"]},{"key":"dc:publisher","label":"Institution","values":["Université de Sherbrooke"]},{"key":"dc:type","label":"Dc Type","values":["Mémoire de maîtrise"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Génie chimique"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Maîtrise"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M. Sc. A."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Université de Sherbrooke"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Catalyseur","Réaction Fischer-Tropsch","Injection de suspension","Carbure de fer","Nanoparticules","Plasma inductif"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/11143/1454"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["In this study nanometric iron carbide particles were produced by using an induction thermal plasma reactor. There are several applications for iron carbide particles in research and industry, such as in ferrofluids, magnetic recording and biosensors. We are focused in this project on its application as catalyst for Fischer-Tropsch reaction. Two different injection methods were used in this study. Suspension injection was used because of its capability to inject heterogeneous precursors, and solid injection was used to inject reactants with any desired molar ratio. The effect of several process parameters was investigated (plate power, injection rate, probe position, particle size and reactant ratio) and composition and morphology of produced powder were characterized using several characterization techniques including X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Thermogravimetric Analysis (TGA), and specific surface area measurement using BET method. XRD results showed that the produced powder has about 50% of iron carbide alongside other phases such as pure iron, austenite and graphite. SEM and TEM images revealed that nanometric particles with a diameter between 10-50 nm were produced alongside larger particles with diameter between 1 to 3 [micrometer]. High resolution TEM images showed that the produced nanometric particles have a core-shell structure and that they are embedded in an amorphous carbon. A new method has also been developed to collect the produced nanopowder in a liquid in order to minimize nanoparticle dispersion into the air, and protect pyrophoric nanoparticles from air exposure.","Dans cette étude, les nanoparticles de carbure de fer ont été synthétisées dans un réacteur à plasma inductif. Dans ce travail nous nous sommes concentrés sur les applications du carbure de fer commè catalyseur de la réaction Fischer-Tropsch. Il y a beaucoup d'applications pour le carbure de fer en recherche et dans l'industrie, comme par exemple dans les ferrofluides, l'enregistrement magnétique et les biocapteurs. Deux différentes méthodes d'injection ont été utilisées dans ce projet. L'injection de suspension avec l'avantage d'injecter des précurseurs hétérogènes, et l'injection de solide pour introduire les précurseurs avec tout ratio molaire désiré. L'influence de différents facteurs a été étudiée (puissance, débit d'injection, position de la sonde, taille de particules et ratio molaire des réactifs) sur la composition chimique ainsi que la morphologie des particules produites. Différentes méthodes de caractérisation comme, la diffraction des rayons X (DRX), la microscopie électronique à balayage (MEB), la microscopie électronique à transmission (MET) , l'analyse thermogravimétrique, et l'analyse de la surface spécifique par méthode BET ont été utilisées. Les résultats de DRX ont montré que les particules produites contiennent environs 50% massique de carbure de fer et que les autres composants produits sont l'austénite, le graphite et le fer pur. Les images de MEB et MET ont révélé que les particules nanométriques avec des diamètres entre 10 et 50 nm ont été produites à coté de plus grosses particules de diamètre entre 1 et 5 μm. Les images de MET en haute résolution ont montré que les particules nanométriques ont une structure «noyau-coquille» et qu'elles sont enrobées avec une couche de carbone amorphe et graphitique. Une nouvelle technique de collecte de nanopoudre produite a aussi été développée afin de collecter des poudres dans un liquide inerte. Le but de cette méthode est de minimiser la dispersion des nanoparticules dans l'air et de les protéger contre l'oxydation instantanée."]},{"key":"dc:title","label":"Title","values":["Synthèse de nanoparticules de carbure de fer dans un réacteur à plasma inductif"]}]}],"canonical_facts":{"dc:contributor.advisor":["Gitzhofer, François","Abatzoglou, Nicolas"],"dc:creator":["Eslahpazir Esfandabadi, Roham"],"dc:date.accessioned":["2014-05-14T19:52:04Z"],"dc:date.available":["2014-05-14T19:52:04Z"],"dc:date.issued":["2009"],"dc:description.abstract":["In this study nanometric iron carbide particles were produced by using an induction thermal plasma reactor. There are several applications for iron carbide particles in research and industry, such as in ferrofluids, magnetic recording and biosensors. We are focused in this project on its application as catalyst for Fischer-Tropsch reaction. Two different injection methods were used in this study. Suspension injection was used because of its capability to inject heterogeneous precursors, and solid injection was used to inject reactants with any desired molar ratio. The effect of several process parameters was investigated (plate power, injection rate, probe position, particle size and reactant ratio) and composition and morphology of produced powder were characterized using several characterization techniques including X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Thermogravimetric Analysis (TGA), and specific surface area measurement using BET method. XRD results showed that the produced powder has about 50% of iron carbide alongside other phases such as pure iron, austenite and graphite. SEM and TEM images revealed that nanometric particles with a diameter between 10-50 nm were produced alongside larger particles with diameter between 1 to 3 [micrometer]. High resolution TEM images showed that the produced nanometric particles have a core-shell structure and that they are embedded in an amorphous carbon. A new method has also been developed to collect the produced nanopowder in a liquid in order to minimize nanoparticle dispersion into the air, and protect pyrophoric nanoparticles from air exposure.","Dans cette étude, les nanoparticles de carbure de fer ont été synthétisées dans un réacteur à plasma inductif. Dans ce travail nous nous sommes concentrés sur les applications du carbure de fer commè catalyseur de la réaction Fischer-Tropsch. Il y a beaucoup d'applications pour le carbure de fer en recherche et dans l'industrie, comme par exemple dans les ferrofluides, l'enregistrement magnétique et les biocapteurs. Deux différentes méthodes d'injection ont été utilisées dans ce projet. L'injection de suspension avec l'avantage d'injecter des précurseurs hétérogènes, et l'injection de solide pour introduire les précurseurs avec tout ratio molaire désiré. L'influence de différents facteurs a été étudiée (puissance, débit d'injection, position de la sonde, taille de particules et ratio molaire des réactifs) sur la composition chimique ainsi que la morphologie des particules produites. Différentes méthodes de caractérisation comme, la diffraction des rayons X (DRX), la microscopie électronique à balayage (MEB), la microscopie électronique à transmission (MET) , l'analyse thermogravimétrique, et l'analyse de la surface spécifique par méthode BET ont été utilisées. Les résultats de DRX ont montré que les particules produites contiennent environs 50% massique de carbure de fer et que les autres composants produits sont l'austénite, le graphite et le fer pur. Les images de MEB et MET ont révélé que les particules nanométriques avec des diamètres entre 10 et 50 nm ont été produites à coté de plus grosses particules de diamètre entre 1 et 5 μm. Les images de MET en haute résolution ont montré que les particules nanométriques ont une structure «noyau-coquille» et qu'elles sont enrobées avec une couche de carbone amorphe et graphitique. Une nouvelle technique de collecte de nanopoudre produite a aussi été développée afin de collecter des poudres dans un liquide inerte. Le but de cette méthode est de minimiser la dispersion des nanoparticules dans l'air et de les protéger contre l'oxydation instantanée."],"dc:identifier.uri":["https://hdl.handle.net/11143/1454"],"dc:language.iso":["en"],"dc:publisher":["Université de Sherbrooke"],"dc:subject":["Catalyseur","Réaction Fischer-Tropsch","Injection de suspension","Carbure de fer","Nanoparticules","Plasma inductif"],"dc:title":["Synthèse de nanoparticules de carbure de fer dans un réacteur à plasma inductif"],"dc:type":["Mémoire de maîtrise"],"thesis:degree_discipline":["Génie chimique"],"thesis:degree_level":["Maîtrise"],"thesis:degree_name":["M. Sc. A."],"thesis:institution_name":["Université de Sherbrooke"]},"updated_at":"2026-07-27T21:07:28Z"}