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Dissertations / Theses on the topic 'Sodium carbonate'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Thompson, Laura M. "The depletion of nitric oxide by reaction with molten sodium carbonate and sodium carbonate/sodium sulfide mixtures." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/5797.

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2

Sozen, Gulgun. "The autocausticizing of sodium carbonate with colemanite." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/25138.

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Autocausticizing, a new method to regenerate sodium hydroxide from the sodium carbonate, is intended to replace the conventional Kraft Recovery System which uses calcium hydroxide produced in a lime kiln for this purpose. It is defined as the self-induced expulsion of carbon dioxide bound in the smelt by using certain amphoteric oxides. Thus autocausticizing can eliminate the need for a lime cycle and hence reduce the Kraft process capital and operating costs. The reactions between sodium carbonate and a number of amphoteric oxides have been reported in the literature. Patents have been issue

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3

Eames, Douglas J. "Direct causticizing of sodium carbonate with manganese oxide." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/7026.

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4

Shaikh, Amjad A. "Conversion of sodium carbohydrate to sodium carbonate monohydrate in an inclined horizontal rotating cylinder." Thesis, University of Sheffield, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444877.

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5

Dickinson, Clive F. "The kinetics of glass making reactions involving sodium carbonate." Thesis, University of Salford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271248.

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6

Jadon, Ankita. "Interactions between sodium carbonate aerosols and iodine fission-products." Thesis, Lille 1, 2018. http://www.theses.fr/2018LIL1R021/document.

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L’analyse de sûreté des réacteurs à neutrons rapides refroidis au sodium de Génération IV nécessite l'étude des conséquences d'un accident grave en cas de rejet dans l'environnement du sodium et des radionucléides qu'il transporte (terme source chimique et radiologique). Le terme source global dépend donc à la fois de la spéciation chimique des aérosols de sodium, issus de la combustion du sodium dans l'enceinte, et de leurs interactions avec les radionucléides. Au cours de cette thèse, les interactions entre le carbonate de sodium et les produits de fission gazeux iodés (I2 et HI) ont été étu

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7

Jadon, Ankita. "Interactions between sodium carbonate aerosols and iodine fission-products." Electronic Thesis or Diss., Université de Lille (2018-2021), 2018. http://www.theses.fr/2018LILUR021.

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L’analyse de sûreté des réacteurs à neutrons rapides refroidis au sodium de Génération IV nécessite l'étude des conséquences d'un accident grave en cas de rejet dans l'environnement du sodium et des radionucléides qu'il transporte (terme source chimique et radiologique). Le terme source global dépend donc à la fois de la spéciation chimique des aérosols de sodium, issus de la combustion du sodium dans l'enceinte, et de leurs interactions avec les radionucléides. Au cours de cette thèse, les interactions entre le carbonate de sodium et les produits de fission gazeux iodés (I2 et HI) ont été étu

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8

Al-Wohoush, Mohammad. "Selective absorption of hydrogen sulfide in aqueous sodium carbonate solutions." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=69785.

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The absorption of hydrogen sulfide and carbon dioxide in aqueous sodium carbonate solution was studied on a pilot scale packed column operated counter-currently under atmospheric pressure. The absorption column was 7.5 cm in diameter and 150 cm in height and packed randomly with 6 mm Intalox Saddles. It was designed to remove hydrogen sulfide from a gas mixture of 1.5% hydrogen sulfide and 15% carbon dioxide at an efficiency of 95%. Reliability of the experimental setup has been perused by investigating the residence time distribution of the gas phase in the column and by studying the absorpti

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9

Belhimer, E. "Stress corrosion cracking of pipeline steels and pure iron in a sodium carbonate-sodium bicarbonate solution." Thesis, University of Newcastle Upon Tyne, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376310.

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10

Gagnon, Gerard R. "The Colloidal Properties and Rheological Behavior of Precipitated Calcium Carbonate Suspensions Dispersed with Sodium Polyacrylate." Fogler Library, University of Maine, 2008. http://www.library.umaine.edu/theses/pdf/GagnonG2008.pdf.

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11

Akyildiz, Ugur. "Effect Of Sodium Carbonate On Carbothermic Formation Of Hexagonal Boron Nitride." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612579/index.pdf.

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Effect of Na2CO3 on formation of hexagonal boron nitride (h-BN) by carbothermic method has been studied by subjecting B2O3-C and Na2CO3-added B2O3-C mixtures to N2 (g) atmosphere. Na2CO3 amount in the mixtures was changed in the range of 0-40 wt. %. Time and temperature were used as experimental variables. Reaction products were analyzed by XRD and scanning electron microscope. Na2CO3 was found to increase both the amount and the particle size of h-BN similar to CaCO3 [1]. Na2CO3 was found to be less effective than CaCO3 in increasing the amount while it was more effective than CaCO3 in increa

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12

Rechberger, Johann. "Stress corrosion cracking of rotor steels in carbonate/bicarbonate and sodium hydroxide solutions." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/26321.

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In this study, the stress corrosion behavior of 3.5%NiCrMoV and 1%CrMoV steels was investigated. Tests were conducted at 95°C in carbonate/bicarbonate and sodium hydroxide solutions. Results from slow strain rate tensile tests and fracture mechanics experiments were compared. A new, easily machinable, specimen geometry for fracture mechanics experiments was tested. The influence of pH, potential, microstructure and inclusions were studied. Stress corrosion cracking (SCC) was found with all three steels in the 3.5M NaOH solution at active, passive and transpassive potentials. In the 1M carbona

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13

Azar, Patrick. "Performance et durabilité d'un laitier de haut-fourneau activé au carbonate de sodium." Electronic Thesis or Diss., Toulouse, INSA, 2023. http://www.theses.fr/2023ISAT0058.

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L'industrie du ciment est responsable d'environ 7 % du total des émissions de CO2 dans le monde et de 52 % de celles émises dans le domaine de la construction. Le développement de nouveaux matériaux de construction durables et à faible émission est essentiel pour que le secteur de la construction réduise l'empreinte environnementale de ses activités. Les émissions de gaz à effet de serre et le coût énergétique liés à la production des laitiers de haut-fourneau alcali-activés au carbonate de sodium (AAS-Na2CO3) sont en général plus faibles que ceux des ciments ordinaires, ce qui constitue un av

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14

Gudavalli, Ravi Krishna. "Effect of pH and temperature on the carbonate promoted dissolution of sodium meta-autunite." FIU Digital Commons, 2012. http://digitalcommons.fiu.edu/etd/773.

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Release of uranium from Na-autunite, an artificial mineral created as a result of polyphosphate injection in the subsurface at the DOE Hanford Site, takes place during slow dissolution of the mineral structure. Stability information of the uranyl-phosphate phases is limited to conditions involving pH, temperature, and a few aqueous organic materials. The carbonate ion, which creates very strong complexes with uranium, is the predominant ion in the groundwater composition. The polyphosphate technology with the formation of autunite was identified as the most feasible remediation strategy to seq

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15

Gershon, Daniel. "Kinetics of Autocausticization Using Borates in a Black Liquor Gasification Process." Thesis, Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4762.

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The path of research in the pulp and paper industry is heading towards the elimination of the lime cycle, which requires large amounts of energy, and changing the conventional recovery boiler system to a gasification process that will reduce the possibility of smelt water explosions while meeting future environmental regulations. Research has been carried out on both gasification processes and on causticizing processes that can replace or complement the lime cycle, however very little research has gone into the actual kinetics of causticization using black liquor in gasification processes. T

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16

Nohlgren, Ingrid. "Recovery of kraft black liquor using the titanate process : kinetics of the direct causticization reaction between sodium tri-titanate and sodium carbonate." Licentiate thesis, Luleå tekniska universitet, 1999. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18189.

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The solid state reaction between sodium tri-titanate and sodium carbonate, forming mainly sodium penta-titanate, was investigated. Experiments were carried out in a micro-differential reactor made of quartz glass at various temperatures between 800°C and 880°C and in a pilot fluidized bed reactor operated in a semi-batch mode. In the micro-differential reactor, basic kinetic data was obtained by measuring the release of carbon dioxide during the reaction. Different kinetic models were considered to describe the conversion, such as the Valensi-Carter model for diffusion controlled reaction rate

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17

Dubouis, Michel. "Régénération de la soude à partir de solutions de carbonate de sodium par des procédés électromembranaires." Grenoble INPG, 1993. http://www.theses.fr/1993INPG0051.

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Differents procedes electromembranaires sont concus et etudies pour regenerer de la soude a partir de solutions de carbonate de sodium. En presence d'especes oxydables en faibles quantites, la regeneration s'effectue avec une cellule a une seule membrane permselective echangeuse de cations. Pour eviter l'oxydation de ces especes, par exemple le sulfure (na#2s) de la liqueur verte du procede kraft, le procede electromembranaire le plus adapte par sa simplicite et par sa capacite de fonctionnement sur le long terme, est constitue d'un electrolyseur a deux membranes echangeuses de cations, preced

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18

Chandra, Yusup. "Alkaline pulping deadload reduction studies in chemical recovery system /." Thesis, Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-11162004-132752/unrestricted/Chandra%5FYusup%5F200412%5Fmast.pdf.

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Thesis (M.S.)--Chemical Engineering, Georgia Institute of Technology, 2005.<br>Empie, Jeff, Committee Chair ; Banerjee, Sujit, Committee Member ; Deng, Yulin, Committee Member. Includes bibliographical references.

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19

Blanco, Andujar C. "Sodium carbonate mediated synthesis of iron oxide nanoparticles to improve magnetic hyperthermia efficiency and induce apoptosis." Thesis, University College London (University of London), 2014. http://discovery.ucl.ac.uk/1430360/.

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Iron oxide nanoparticles are a popular choice for many current technologies, especially those with applications in biology and medicine. Novel syntheses that aim to improve their physicochemical properties, or adapt them to distinct practical applications, are constantly being reported. However, the reproducibility of these methods is not commonly studied, leading to promising products that have little chance of being commercially manufactured. Adherence to good manufacturing practice standards is a decisive factor in determining whether a material may be granted regulatory approval for indust

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20

Kiiashko, Artur. "Amélioration des propriétés rhéologiques et à jeune âge des laitiers alcali-activés au carbonate de sodium." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLN033.

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Aujourd'hui, les problèmes environnementaux sont plus graves que jamais. Des mesures urgentes devraient être prises dans tous les domaines de l'activité humaine, y compris la construction. L'un des principaux contributeurs à l'impact négatif de cette industrie sur l'environnement est la fabrication du ciment Portland ordinaire (OPC) nécessaire à la production de béton et d’autres matériaux cimentaire. Malgré son importance, il présente un inconvénient important: sa production est accompagnée par de grandes quantités de gaz à effet de serre. Ils représentent 5 à 8% des émissions mondiales total

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21

Tong, Tianjian. "Co-effects of calcium carbonate and sodium bisulfite modification on improving water resistance of soy protein adhesives." Thesis, Kansas State University, 2012. http://hdl.handle.net/2097/14196.

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Master of Science<br>Department of Grain Science & Industry<br>Xiuzhi Susan Sun<br>Bio-based protein adhesives derived from renewable resources, especially soy protein are becoming more significant due to the concerns about environment and health related issues and the limit of petroleum recourses. However, the relatively poor water resistance of soy-based protein adhesives limits its wide applications. The goal of this study was to improve the water resistance performance of soy-based protein adhesives by chemical modification. The specific objectives are 1) to modify soy protein with calcium

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22

Beau, Daniel-Louis. "Action du dioxyde de carbone et des granulats calcaires sur les aluminates de calcium hydratés à l'équilibre de solubilité : influence des ions sulfates, réaction du calcaire finement pulverisé avec le silicate de sodium en solution alcaline." Dijon, 1991. http://www.theses.fr/1991DIJOS001.

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La mise en équations des équilibres de solubilité des différents aluminates de calcium hydratés et du gel d'alumine permet de construire leurs courbes d'équilibre dans les domaines métastables du diagramme chaux-alumine-eau. La prise en compte de l'action du dioxyde de carbone atmosphérique oblige à établir un diagramme tri-dimensionnel. Les courbes d'équilibre de solubilité des différentes phases hydratées sont des courbes gauches, dont les projections sur le plan chaux-alumine sont facilement exploitables. Dans un système isolé du dioxyde de carbone atmosphérique, mais en présence de granula

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23

Diguet, Sylvain. "Contribution à l'étude de la déshydratation du carbonate de sodium monohydrate en lit fluidisé dense et mise en oeuvre en lit fluidisé circulant : étude expérimentale et modélisation." Toulouse, INPT, 1996. http://www.theses.fr/1996INPT022G.

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La deshydratation du carbonate de sodium monohydrate est l'une des etapes clefs dans la fabrication d'un produit mineral de premier rang, le carbonate de soude dense. Cette reaction gaz-solide est souvent realisee dans des fours rotatifs ou des fours tunnels. Or, ce type de reacteur est tres mal adapte pour les reactions rapides controlees par les transferts externes de matiere et de chaleur a cause de la difficulte a controler l'atmosphere environnant les grains. Cette derniere a une influence, non seulement sur le rendement energetique de l'operation, mais egalement sur la morphologie finale

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24

Gao, Jiong. "UV/Sodium Percarbonate for Treatment of Bisphenol A in Water." University of Cincinnati / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin161710940946631.

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25

Nasir, Subriyer. "Membrane performance and build-up of solute during small scale reverse osmosis operation." Thesis, Curtin University, 2007. http://hdl.handle.net/20.500.11937/590.

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Reverse Osmosis (RO) is widely accepted as an alternative method to produce freshwater from different feed water sources. This technology competitively substitutes the thermal processes in the near future because of several advantages particularly in energy saving. The success of RO operation will, however, depends largely on the overall membrane performance. Deposit or build-up of solute is one of the main reasons for membrane operation failure. Build-up of solute or deposit which is known as fouling and scaling will decrease the permeate flux and increase the energy consumption in particular

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26

Verrill, Christopher Lee. "Inorganic aerosol formation during black liquor drop combustion." Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/5793.

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27

St-Laurent, Anne-Marie. "Evaluation of methods and effects of feeding sodium bicarbonate in conventional diets to dairy cows in early lactation and effects of feeding buffers prepartum on performance in early lactation." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66132.

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28

Chalamuri, Shanmuka Harish. "The Evaluation of the Effect of Anionic and Cationic Surfactants on the Hindered Settling of Light Calcium Carbonate Suspensions." University of Toledo Health Science Campus / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=mco1418602604.

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29

Zethelius, Thea. "Natriumkarbonat som alternativ alkalikälla till natriumhydroxid : Impregnering och blekning av kemitermomekanisk massa." Thesis, Karlstads universitet, Institutionen för ingenjörs- och kemivetenskaper (from 2013), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-72437.

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Arbetet handlade om att ta reda på om det går att byta ut natriumhydroxid mot natriumkarbonat som alkalikälla på CTMP-linjen, och gjordes på uppdrag av Stora Enso Skoghalls bruk. De områdena som studerades var impregnering och blekning av CTMP (kemitermomekanisk pappersmassa) samt hantering av natriumkarbonatlösning. Natriumkarbonatens löslighet vid olika temperaturer verifierades, blekning av CTMP med natriumkarbonat och natriumhydroxid utfördes, titrering av natriumhydroxid och natriumkarbonat mot natriumbisulfitlösning och en enklare laborationsimpregnering gjordes. Även aspekten av utrustn

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30

Samperisi, Laura. "Study of the effectiveness of crystal growth modifiers in the prevention of damage due to crystallization of sodium carbonates in stone artworks." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/14399/.

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The disintegration of stone materials used in sculpture and architecture due to the crystallization of salts is capable of irreparably damaging artistic objects and historic buildings. A number of phosphonates and carboxylates were tested here as potential crystallization modifiers for sodium carbonate crystallization. Precipitated phases during crystallization induced either by cooling or by evaporation tests were nahcolite (NaHCO3), natron (Na2CO3∙10H2O) and thermonatrite (Na2CO3∙H2O), identified using X-ray diffraction. By using the thermodynamic code PHREEQC and the calculation of the nuc

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31

BLENGINO, JEAN-MICHEL. "Contribution a l'etude de la corrosion sous contrainte du fer et des aciers doux en milieu carbonate-hydrogenocarbonate de sodium." Paris 6, 1993. http://www.theses.fr/1993PA066671.

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La presente etude tente d'apporter quelques elements nouveaux a la connaissance de la fissuration sous contrainte du fer et des aciers doux assistee par un environnement riche en ions hydrogenocarbonate, phenomene aujourd'hui unanimement reconnu comme cause de nombreux cas de rupture de canalisations de transport d'hydrocarbures ou de gaz soumises a une protection cathodique. L'etude des phenomenes electrochimiques regissant la dissolution du fer dans le domaine de potentiel correspondant a la transition activite-passivite (zone sensible vis-a-vis de la corrosion sous contrainte), la caracteri

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32

Joseph, Manjusha. "A study of carbonate-rich brines from Sua Pan to characterize organic contaminants in the soda ash process." Thesis, Rhodes University, 2001. http://hdl.handle.net/10962/d1004091.

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Botswana Ash (Pty) Ltd which is situated in Sua Pan, north east Bostwana, is one of Africa's largest suppliers of salt and soda ash. For a number of years, the company has been experiencing problems which have resulted in the final soda ash product being contaminated and discoloured. The problems experienced at Sua Pan have been reported also to occur in other salt works all over the world. It has been suggested that contamination in many salt works could be possibly be due to the microbial activity by halophilic algae and bacteria that grow in the solar ponds. This study was undertaken to inv

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33

Feng, Xu. "Interaction of Na, O2, CO2 and water on MnO(100): Modeling a complex mixed oxide system for thermochemical water splitting." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/77378.

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A catalytic route to hydrogen production via thermochemical water splitting is highly desirable because it directly converts thermal energy into stored chemical energy in the form of hydrogen and oxygen. Recently, the Davis group at Caltech reported an innovative low-temperature (max 850C) catalytic cycle for thermochemical water splitting based on sodium and manganese oxides (Xu, Bhawe and Davis, PNAS, 2012). The key steps are thought to be hydrogen evolution from a Na2CO3/MnO mixture, and oxygen evolution by thermal reduction of solids formed by Na+ extraction from NaMnO2. Our work is aimed

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34

Nasir, Subriyer. "Membrane performance and build-up of solute during small scale reverse osmosis operation." Curtin University of Technology, Department of Chemical Engineering, 2007. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=17394.

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Reverse Osmosis (RO) is widely accepted as an alternative method to produce freshwater from different feed water sources. This technology competitively substitutes the thermal processes in the near future because of several advantages particularly in energy saving. The success of RO operation will, however, depends largely on the overall membrane performance. Deposit or build-up of solute is one of the main reasons for membrane operation failure. Build-up of solute or deposit which is known as fouling and scaling will decrease the permeate flux and increase the energy consumption in particular

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35

Nobel, Pujol-Lesueur Véronique. "Etude du mécanisme d'action du monofluorophosphate de sodium comme inhibiteur de la corrosion des armatures metalliques dans le beton." Paris 6, 2004. http://www.theses.fr/2004PA066251.

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36

Marins, Gabriel de. "Caracterização do licor negro de eucalipto para avaliação do potencial de incrustação em evaporadores." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266706.

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Orientador: José Vicente Hallak d'Angelo<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-21T11:05:01Z (GMT). No. of bitstreams: 1 Marins_Gabrielde_M.pdf: 4193921 bytes, checksum: e80672b42613eddad46d14b2c94e31c8 (MD5) Previous issue date: 2012<br>Resumo: No processo Kraft para produção de papel e celulose, os cavacos de madeira são cozidos em um digestor com uma solução aquosa denominada licor branco, constituída de hidróxido de sódio (NaOH) e sulfeto de sódio (Na2S). Durante o cozimento uma pasta fibrosa é

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37

Bayuadri, Cosmas. "Stability of sodium sulfate dicarbonate (~2Na₂CO₃• Na₂SO₄) crystals." Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/11507.

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Research on salts species formed by evaporation of aqueous solution of Na2 in the early 1930s. The thermodynamic, crystallographic and many other physical and chemical properties of most of the species formed from this solution has been known for decades. However, there was no complete information or reliable data to confirm the existence of a unique double salt that is rich in sodium carbonate, up until five years ago when a research identified the double salt (~2Na ₂ CO ₃ • Na ₂ SO ₄) from the ternary system Na₂CO ₃Na₂SO ₄ H₂O. Crystallization of this double salt so called sodium sulfate dic

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38

Sellami, Jawhar. "Conception, mise en œuvre, développement et modélisation de réacteurs de précipitation utilisant des lits fluidisés." Thesis, Vandoeuvre-les-Nancy, INPL, 2008. http://www.theses.fr/2008INPL088N/document.

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L’objectif de ce travail est de concevoir, développer, mettre en œuvre et optimiser une technologie continue permettant une bonne maîtrise des réactions de précipitation, processus chimique rapide donnant naissance à une phase solide. Ce précipiteur est un réacteur multifonctionnel à lit fluidisé qui n’a pas connu le même essor que les cristallisoirs à lit fluidisé. Deux approches expérimentales ont été adoptées : (1) l’étude des phénomènes de mélange des réactifs et (2) l’étude de l’influence des conditions opératoires sur la précipitation d’un produit modèle. Le produit modèle choisi pour ce

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39

Woelffel, William. "Réactivité effective des mélanges vitrifiables granulaires silico-sodocalciques." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066598/document.

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L'objectif de cette thèse est d'étudier les transformations physico-chimiques lors de l'élaboration d'un verre à partir d'un mélange granulaire. Les mélanges vitrifiables industriel formant des verres de vitrage ou de conditionnement sont approchés par le système à trois oxydes SiO2-CaO-Na2O, apportés sous forme de sable, de calcaire et de carbonate de sodium. Cette simplification permet d'étudier le lien entre microstructrure de l'empilement granulaire et transformations pendant le chauffage. La variété des chemins réactionnels entre les grains de matières premières transmet en effet l'hétéro

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40

Nunes, Shirlle Katia da Silva. "Tratamento de ?gua de produ??o de petr?leo visando o aproveitamento na obten??o de barrilha." Universidade Federal do Rio Grande do Norte, 2013. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15927.

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Made available in DSpace on 2014-12-17T15:01:56Z (GMT). No. of bitstreams: 1 ShirlleKSN_TESE_PARCIAL.pdf: 1534638 bytes, checksum: ca047a7bd2b85b3f98d9d4d116c8a5d1 (MD5) Previous issue date: 2013-07-19<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>The petroleum production is associated to the produced water, which has dispersed and dissolved materials that damage not only the environment, but also the petroleum processing units. This study aims at the treatment of produced water focusing mainly on the removal of metals and oil and using this treated water as raw mate

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Hurley, Jeffrey S. "Phase transfer catalysis of deuterium exchange reactions : II kinetic and mechanistic studies of the thermal decomposition of glycolate and hedta in the presence of the sodium salts of hydroxide, nitrate, nitrite, aluminate and carbonate." Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/30717.

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Pohlenz, Julia [Verfasser], Max [Akademischer Betreuer] Wilke, Max [Gutachter] Wilke, Gerhard [Gutachter] Franz, and Stéphanie [Gutachter] Rossano. "Structural insights into sodium-rich silicate - carbonate glasses and melts : a combined study of trace element in-situ XAFS and Molecular Dynamics / Julia Pohlenz ; Gutachter: Max Wilke, Gerhard Franz, Stéphanie Rossano ; Betreuer: Max Wilke." Potsdam : Universität Potsdam, 2019. http://d-nb.info/1218404477/34.

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Woelffel, William. "Réactivité effective des mélanges vitrifiables granulaires silico-sodocalciques." Electronic Thesis or Diss., Paris 6, 2015. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2015PA066598.pdf.

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L'objectif de cette thèse est d'étudier les transformations physico-chimiques lors de l'élaboration d'un verre à partir d'un mélange granulaire. Les mélanges vitrifiables industriel formant des verres de vitrage ou de conditionnement sont approchés par le système à trois oxydes SiO2-CaO-Na2O, apportés sous forme de sable, de calcaire et de carbonate de sodium. Cette simplification permet d'étudier le lien entre microstructrure de l'empilement granulaire et transformations pendant le chauffage. La variété des chemins réactionnels entre les grains de matières premières transmet en effet l'hétéro

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Simone, Virginie. "Développement d'accumulateurs sodium-ion." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAI092/document.

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Au vu d’une demande croissante pour un stockage d’énergie à grande échelle, il est préférable de se tourner vers des matériaux peu coûteux et répandus. De ce point de vue, le sodium, qui présente des caractéristiques très proches de celles du lithium, présente également l’avantage d’être peu coûteux, abondant et réparti uniformément dans le monde. Cette thèse porte sur l’étude d’un système complet Na-ion constitué d’un carbone dur à l’électrode négative et d’un oxyde lamellaire à l’électrode positive. Un volet sur l’électrolyte a également été abordé.Concernant l’électrode négative, l’influenc

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Wopperer, Philipp. "Electron photoemission from sodium and carbon clusters." Phd thesis, Université Paul Sabatier - Toulouse III, 2013. http://tel.archives-ouvertes.fr/tel-00860445.

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Des distributions angulaires (PAD) et des spectres (PES) de photoélectrons émis par des agrégats sous l'action des lasers à impulsions femtosecondes linéairement polarisées ou d'une impulsion instantanée sont calculés théoriquement dans un modèle basé sur la théorie de la fonctionnelle de la densité dépendante du temps (TDDFT). Les systèmes finis étudiés sont de petits agrégats de sodium, des chaînes de carbone C_N (N = 3, 5, 7), et le célèbre buckminsterfullerène C_60. Le comportement de l'émission éléctronique est exploré en fonction de la taille, la forme, la structure électronique et ioniq

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Amaral, Ian Rodrigues do. "Propriedades estruturais e vibracionais de carbonatos fosfatos isoestruturados (sidorenkiktas)." Universidade Federal do CearÃ, 2017. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=18566.

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Carbonatos fosfatos isoestruturados do tipo sidorenkitas sÃo materiais com alto potencial de aplicaÃÃo em cÃtodos dos mais modernos tipos de baterias de sÃdio. Sua estrutura lamelar permite a inserÃÃo e extraÃÃo dos Ãons de sÃdio, que sÃo a principal fonte de forÃa eletromotriz da bateria. Utilizando um elemento muito mais abundante na crosta terrestre, esses dispositivos sÃo a grande promessa para substituiÃÃo da, jÃ bastante difundida, bateria de Ãons de lÃtio. PorÃm, o cÃtodo que contÃm as caracterÃsticas ideais para produzir o melhor desempenho, propiciando alta densidade de energia e esta

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Thomas, Philippe. "Contribution à l'étude de l'insertion électrochimique du sodium dans différentes structures carbonées." Nancy 1, 1999. http://www.theses.fr/1999NAN10275.

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Ce travail se situe dans le cadre général de l'étude de l'insertion électrochimique de métaux alcalins dans des matériaux carbonés susceptibles d'applications comme anodes de générateurs secondaires. Une attention toute particulière est portée sur l'influence de la nature de l'électrolyte et du matériau carboné sur les performances électrochimiques (capacités réversible et irréversible, évolution en cyclage). L'insertion des ions sodium dans des électrolytes à base de solvants carbonates est décrite pour le graphite UF4 et les fibres P75. L'utilisation du carbonate d'éthylène (EC) entraîne la

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Adhoum, Nafaâ. "Insertion du sodium et pénétration de l’électrolyte dans le carbone en milieu NaF fondu à 1025°C." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0185.

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Pendant l’électro-élaboration de l’aluminium par le procédé Hall-Héroult en milieu de cryolite fondue, il y a production parasite de sodium qui imprègne le carbone du bloc cathodique, suivi de près par l’électrolyte. Ceci provoque le gonflement du carbone et conduit à la limitation de la durée de vie de la cellule d’électrolyse. Dans l’objectif d’élucider les mécanismes d’interaction entre le sodium et le carbone, nous avons mené une étude de cinétique électrochimique en milieu NaF pur fondu à 1025°C. L’utilisation de diverses techniques électrochimiques (voltampérométrie, chronopotentiométrie

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Vivaldi, Daniele. "Modeling of underexpanded reactive CO2-into-sodium jets, in the frame of sodium fast reactors." Thesis, Saint-Etienne, EMSE, 2013. http://www.theses.fr/2013EMSE0707/document.

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Ce travail de thèse s’est inscrit dans le contexte d’utilisation d’un cycle de conversion de l’énergie de type Brayton au CO2 supercritique, pour les réacteurs à neutrons rapides refroidis au sodium (RNRNa). Dans le cas d’une fuite accidentelle dans l’échangeur de chaleur Na − CO2 d’un RNRNa, le CO2, avec une pression opérative d’environ 200 bars, serait injecté dans le sodium liquide qui se trouve à basse pression,provoquant un jet sous-détendu et réactif deCO2 dans le sodium. L’objectif principal de ce travail de thèse était le développement d’un modèle numérique du jet réactif diphasique de

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Srisuwan, Nakarin Pébère Nadine. "Propriétés inhibitrices d'un mélange d'amines grasses et de sébaçate de sodium vis-à-vis de la corrosion d'un acier au carbone." Toulouse : INP Toulouse, 2008. http://ethesis.inp-toulouse.fr/archive/00000707.

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