Relevant bibliographies by topics / Barium sulfide

Academic literature on the topic 'Barium sulfide'

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Published: 30 May 2022
Last updated: 31 May 2022

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Journal articles on the topic "Barium sulfide"

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Li, Pei Xin, Feng Qing Zhao, and Shao Jie Liu. "Preparation of Ultrafine Barium Sulfate Using Sodium Sulfate Content Wastewater." Advanced Materials Research 718-720 (July 2013): 96–101. http://dx.doi.org/10.4028/www.scientific.net/amr.718-720.96.

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The wastewater from folic acid production contains a large amount of sodium sulfate. In this paper, this sodium sulfate wastewater was used to react with the industry black salt (barium sulfide) to prepare barium sulfate. By adjusting the feeding mode, reaction temperature, reactant concentration and stirring speed, the optimal experimental condition was determined. The barium sulfates particle size under this condition was 320 nm, with good whiteness but low energy consumption. The product not only turns the waste to useful product successfully, but also meets Chinese policy of energy-saving, emission reduction and sustainable development.
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Kabdasli, Isik, Olcay Tünay, and Derin Orhon. "Sulfate removal from indigo dyeing textile wastewaters." Water Science and Technology 32, no. 12 (December 1, 1995): 21–27. http://dx.doi.org/10.2166/wst.1995.0451.

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Sulfate is an important parameter especially for discharges to sewer systems. The textile industry is a major source of sulfate. Some sulfate sources in the industry have material replacement alternatives. However in some sources, sulfate or species convertible to sulfate are the main materials. The indigo dyeing process involves sulfur species as main materials. In this study, indigo dyeing wastewaters which contain significant concentrations of oxidized and non-oxidized sulfur components are evaluated in terms of sulfate removal. The approach is a pretreatment at the source before being mixed with other wastewaters. The study is conducted in two steps. In the first step, conversion of species to either sulfide or sulfate is experimentally evaluated. While reduction to sulfide poses problems, oxidation of all species to sulfate is found to be applicable. In the second step sulfate precipitation using calcium, barium and lead is practiced. Calcium precipitation provides up to 30% sulfate removal and these results are supported with existing literature data. Barium sulfate and lead sulfate precipitation provided practically complete removal. Economical evaluation of alternative methods is also given.
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Yang, G. Y., Y. Bando, M. Saeki, and M. Onoda. "Structural characterizations of 6H-barium niobium sulfide." Acta Materialia 46, no. 17 (November 1998): 5985–92. http://dx.doi.org/10.1016/s1359-6454(98)00289-4.

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Tang, Yongjun, Darren R. Dunphy, and Richard A. Kemp. "Low-temperature preparation of crystalline barium sulfide." Applied Organometallic Chemistry 19, no. 6 (2005): 803–5. http://dx.doi.org/10.1002/aoc.890.

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Downs, James C. U., Deborah Milling, and Clay A. Nichols. "Suicidal Ingestion of Barium-Sulfide-Containing Shaving Powder." American Journal of Forensic Medicine and Pathology 16, no. 1 (March 1995): 56–61. http://dx.doi.org/10.1097/00000433-199503000-00013.

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Magnall, Joseph M., Sarah A. Gleeson, Robert A. Creaser, Suzanne Paradis, Johannes Glodny, and J. Richard Kyle. "The Mineralogical Evolution of the Clastic Dominant-Type Zn-Pb ± Ba Deposits at Macmillan Pass (Yukon, Canada)—Tracing Subseafloor Barite Replacement in the Layered Mineralization." Economic Geology 115, no. 5 (August 1, 2020): 961–79. http://dx.doi.org/10.5382/econgeo.4730.

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Abstract Clastic dominant-type massive sulfide deposits are well preserved in Upper Devonian carbonaceous mudstones in the Macmillan Pass district (Yukon, Canada). The Macmillan Pass deposits have been considered to be type examples of sedimentary exhalative Zn-Pb mineralization, whereby sulfides precipitated when hydrothermal fluids were vented into a euxinic (H2S-bearing) water column. We propose a new mineralization model, documenting the mineralogical evolution of layered mineralization. We show that textures previously interpreted to form via depositional processes actually formed by subseafloor replacement of diagenetic barite. Mineral assemblages associated with barite dissolution in the layered mineralization include (1) barium carbonate phases (witherite, barytocalcite, and norsethite), which are intergrown with Zn-Pb sulfides and represent localized Ba mass transfer, and (2) barium feldspar (celsian, hyalophane) that is abundant in the mudstones surrounding the layered mineralization. The barium feldspar formed following transport of Ba in low-sulfate fluids on the margins of the subseafloor replacement system. This resulted in whole-rock Ba enrichments (up to 5 wt %) in mudstones 15 m below and above the layered mineralization. High Ba in these surrounding mudstones is coupled with decreasing K/Al ratios, indicative of secondary illite and kaolinite. The source(s) of fluids related to the diagenetic (barite, barytocalcite) and hydrothermal (ankerite) assemblages can be constrained using Sr isotopes. Whereas highly radiogenic 87Sr/86Sr values (>0.714) in ankerite correspond with host-rock alteration within the vent complex, the overlying barite and barytocalcite preserve lower 87Sr/86Sr values (<0.714), providing evidence of mixing between a radiogenic fluid (likely a formation water) and Late Devonian seawater. The complex mineralogy and paragenesis contained within the layered mineralization are linked to a protracted history of diagenetic and hydrothermal fluid events, all of which took place in and peripheral to a subseafloor replacement hydrothermal system.
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Gaikwad, Amit A., Niyantha Challapalli, and Ashok N. Bhaskarwar. "CARBONATION OF BARIUM SULFIDE IN A FOAM-BED REACTOR." Chemical Engineering Communications 197, no. 6 (February 22, 2010): 804–29. http://dx.doi.org/10.1080/00986440903359103.

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Nozaki, Hiroshi, Masanobu Saeki, and Mitsuko Onoda. "Superconducting and Normal State Properties of Barium Tantalum Sulfide." Journal of Solid State Chemistry 116, no. 2 (May 1995): 392–99. http://dx.doi.org/10.1006/jssc.1995.1231.

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Lin, Yu-Feng, Yen-Hwei Chang, Yee-Shin Chang, Bin-Siang Tsai, and Yu-Chun Li. "Luminescent Properties of Trivalent Praseodymium-Doped Barium Zinc Sulfide." Journal of The Electrochemical Society 153, no. 6 (2006): G543. http://dx.doi.org/10.1149/1.2189968.

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Pathak, C. S., D. D. Mishra, V. Agarwala, and M. K. Mandal. "Blue light emission from barium doped zinc sulfide nanoparticles." Ceramics International 38, no. 7 (September 2012): 5497–500. http://dx.doi.org/10.1016/j.ceramint.2012.03.063.

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Dissertations / Theses on the topic "Barium sulfide"

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Цейтлин, Мусий Абрамович, and Валентина Федоровна Райко. "Математическое моделирование равновесного состава системы BaS–Ba(HS)₂–H₂S–H₂O." Thesis, Національний технічний університет України "Київський політехнічний інститут імені Ігоря Сікорського", 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/41241.

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Разработана математическая модель, описывающая равновесный состав системы BaS–Ba(HS)₂–H₂S–H₂О, позволяющая, в частности, рассчитывать рН раствора. Модель использована для расчета движущей силы десорбции сероводорода в процессе получения карбоната бария.
A mathematical model describing the equilibrium composition of the BaS–Ba(HS)₂–H₂S–H₂О system is developed. Model allows, in particular, to calculate the pH of the solution, and was used to calculate the driving force for desorption of hydrogen sulfide in the process of obtaining barium carbonate.
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Whyte, John Morrison. "Surfactant-inhibited barium sulphate nanoparticles for use in drilling fluids." Thesis, University of Aberdeen, 2016. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=231876.

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This project studied the production of barium sulphate nanoparticles through inhibition of crystal growth, during precipitation, by different surfactants. Barium sulphate is the pure form of the ore baryte, which due to its high density and softness, is the most commonly used additive used to increase the density of drilling fluids. A non-agglomerating, stable nano-scale dispersion of barium sulphate particles would have significant technical and commercial impact in the drilling fluids industry. This thesis tested the possibility of precipitating barium sulphate and restricting its crystal growth with inhibitors, creating nanoparticles. Six inhibitors were tested; dodecanoic acid, palmitic acid, stearic acid, adamantane carboxylic acid, methylnonanoic acid and a mixture of phosphate esters known commercially as Fazewet. Precipitated, inhibited barium sulphate was characterised using powder XRD, DRIFT FTIR and solid-state NMR (SSNMR). All inhibitors were shown to form single-phase, orthorhombic barium sulphate crystals proving that the inhibitors affect only the surfaces of precipitated crystals and do not enter the crystal lattice. FTIR allowed the relative adsorbed concentration of each inhibitor to be assessed. The results indicate that adsorbed inhibitor increases with increasing inhibitor concentrations but that their attachment is not proportional to the concentration. In most cases concentrations of 0.1mol l-1 of inhibitor were sufficient to saturate the crystal surface. SSNMR also agreed with this although the sample size was too small, due to equipment restrictions, to make definitive conclusions. Through the use of the Debye-Scherrer equation, the crystallite size was calculated and showed that at concentrations of 0.2mol l-1 all inhibitors other than palmitic acid produced nano-scale (< 100nm) crystallites. Further analysis showed that further reductions could be achieved through precipitation in an alkaline pH environment, with the application of mechanical shear and by using adding 50% v/v of ethanol. iv Laser diffraction particle size analysis showed that the dominant factor in reducing particle size distribution was inhibitor concentration. The volume-based PSD used by the laser diffraction system was considered to distort excessively the particle sizes present and so analysis switched to dynamic light scattering. DLS showed that dodecanoic acid, palmitic acid and stearic acid, despite forming nano-scale crystallites, could not produce a nano-scale dispersion of barium sulphate and as such were unsuitable for use in drilling fluids. Stable nano-scale dispersions were found to have been formed when inhibited with adamantane carboxylic acid, methylnonanoic acid and Fazewet. DLS also confirmed that dispersed particle size rather than simply crystallite size could be reduced with an alkaline pH and high mechanical shear. Concentration was still the dominant effect, however with the smallest particles sizes (ZAvg) being observed at concentrations of 0.6mol l-1. The particle sizes for the three modifiers were approaching that of the crystallite size, suggesting that some further reduction is possible, but large reductions are unlikely. All three inhibitors produced sub 100nm ZAvgs, with the smallest produced by methylnonanoic acid of 43nm. Spherical nanoparticles were observed through the use of ESEM and TEM. Due to equipment time restrictions only 0.2mol l-1 treatment levels could be examined, but ESEM showed apparent nanoparticle clusters, later confirmed using pixel count and SFDA methods. TEM analysis showed discrete particles as small as 3nm, indicating that the lower limit for achievable particle size may be lower than PSD measurements would suggest. The results indicate that adamantane carboxylic acid, methylnonanoic acid and Fazewet sufficiently inhibit crystal growth to be potential candidates for the production of barium sulphate nanoparticles. These three inhibitors produce a barium sulphate dispersion that is stable and nano-scale even after drying and redispersion.
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Pacary, Vincent. "Étude des procédés de décontamination des effluents liquides radioactifs par coprécipitation : de la modélisation à la conception de nouveaux procédés." Thesis, Vandoeuvre-les-Nancy, INPL, 2008. http://www.theses.fr/2008INPL057N/document.

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Le procédé par coprécipitation est l’un des plus utilisé dans l’industrie nucléaire pour le traitement des effluents liquides radioactifs car il peut être appliqué à tous les effluents quelque soit leur composition. Ce procédé consiste à former in situ des particules solides par précipitation dans le but de capter sélectivement un ou plusieurs radioéléments. L’objectif de ce travail de thèse est de mettre en évidence les phénomènes impliqués lors de la coprécipitation d’un élément présent en faible concentration. Pour cela, cette étude propose une nouvelle modélisation des phénomènes de coprécipitation dont l’originalité tient dans la possibilité de simuler le phénomène hors équilibre thermodynamique et à l’échelle d’un réacteur chimique. Ce modèle, couplé avec la résolution du bilan de population, permet d’identifier l’influence des paramètres de procédés (débits, agitation…) sur la décontamination. Afin d’éprouver ce nouveau modèle, celui-ci est appliqué au traitement, dans les conditions industrielles, du strontium par le sulfate de baryum en réacteur continu et semi-fermé. A partir de ces simulations, des lois d’évolution de l’efficacité du traitement en fonction de différents paramètres de procédé (Temps de passage ou d’injection, agitation, concentration de BaSO4) ont été dégagées puis vérifiées expérimentalement. Cette étude permet de définir les meilleures conditions de traitement. Trois dispositifs (à recyclage, à lit fluidisé et réacteur/décanteur) permettant d’approcher ces meilleures conditions ont été testés avec succès. Ceux-ci ouvrent d’importantes perspectives pour la réduction de la quantité de boue produite. Deux brevets ont été déposés suite à ce travail
To decontaminate liquid nuclear wastes, the coprecipitation process is the most commonly used in nuclear field because it can be applied to any type of aqueous effluents whatever their composition may be. This process deals with the in situ precipitation of solid particles to selectively remove one or more radioelements. The aim of this PhD work is to investigate phenomena which take place during the coprecipitation of a trace component. To reach this objective, we have proposed a new modelling of the coprecipitation mechanism. The originality of this new approach lies in the possibility to simulate the phenomenon in non equilibrium conditions and at the reactor scale. This modelling combined with the resolution of the population balance, enable to identify the influence of process parameters (flowrates, stirring speed…) on crystal size and ultimately on decontamination. To test this new modelling, simulations of the coprecipitation of strontium ions with barium sulphate have been performed in continuous and semibatch reactors. Thanks to these simulations, laws of the treatment efficiency variation as a function of several process parameters (mean residence time, stirring speed, BaSO4 concentration) have been determined and experimentally verified. This study leads to the determination of optimal treatment conditions. Three apparatus (recycling apparatus, fluidised bed and reactor/settling tank) providing these optimal conditions have been successfully tested and offered significant outlooks for the reduction of the volume of sludge produced by the process. Two new processes are patent pending
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Yan, Luke, Rongrong Huang, Jian Xiao, Huiyun Xia, Min Chao, and Sven Wieβner. "Preparation and properties of a composite made by barium sulfate-containing polytetrafluoroethylene granular powder." Sage, 2016. https://tud.qucosa.de/id/qucosa%3A35550.

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Barium sulfate (BaSO₄)-containing polytetrafluoroethylene (PTFE) granular powder was prepared through a two-phase emulsion dispersion granulation method. Because of its large bulk density, small average particle size, narrow particle size distribution, and superior powder flowability, the granular powder is suitable for use in automatic molding machines. The effects of granulation on the tensile strength of the BaSO₄/PTFE composite were investigated, and the composite’s microstructures were characterized and analyzed using scanning electron microscopy. All these indicated that the granulation could make BaSO₄ disperse more homogeneously in PTFE and reduce many defects in molded articles. So the properties of the BaSO4/PTFE composites made by the granular powder were superior to the composite obtained from the nongranular powder. The tensile strength and elongation of the composite obtained from the granular powder could be achieved to a level of 19.4 MPa and 420%, respectively.
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Queiróz, Camila Ribeiro Gomide. "Padronização do contraste de Bário nas preparações para videofluoroscopia em bebês com disfagia." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/61/61132/tde-26052014-100340/.

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A videofluoroscopia da deglutição (VDF) é um exame considerado padrão ouro como método de avaliação da deglutição que requer que o paciente ingira o contraste de Bário em diferentes consistências para que as fases oral e faríngea sejam avaliadas com maior efetividade. Porém, existe uma disparidade entre a viscosidade dos alimentos com o contraste de Bário para a VDF e os alimentos espessados com o espessante de forma empírica, indicado subjetivamente na terapia de reabilitação. Por isso, o objetivo desse estudo foi: padronizar a quantidade de espessante a ser acrescentado à fórmula infantil nas consistências néctar (N), mel (M) e pudim (P) em 2 temperaturas: ambiente (T1) e variando de 40ºC até 44ºC (T2); comparar os valores médios das viscosidades com as sete marcas dos espessantes mais comumente utilizados e disponíveis (E1, E2, E3, E4, E5, E6, E7) nas temperaturas T1 e T2; identificar a quantidade mínima de contraste de Bário a ser acrescentado à fórmula infantil para boa resolução na videofluoroscopia (50%, 25% e 12,5%) e elaborar um manual de preparo de alimento para VFD nas diferentes consistências (N, M, P) com contraste de Bário. Para a padronização foram utilizados sete marcas de espessantes, uma fórmula infantil de partida, e a média da viscosidade avaliada por meio do viscosímetro Brookfield modelo DV-E, em duas temperaturas (ambiente e acima de 40ºC). Foram avaliadas três diluições (50%, 25% e 12,5%) do contraste de Bário (Bariogel 100%) nos leites espessados por meio de seringas no aparelho de VFD e as imagens obtidas julgadas por duas fonoaudiólogas experientes no exame. Os resultados revelaram que a padronização da quantidade de espessante a ser acrescentado à fórmula infantil para obtenção das consistências néctar, mel e pudim, nas temperaturas testadas, variou com o tipo de espessante, requerendo a orientação de um manual para correta manipulação. Os valores de viscosidade diminuíram com o aumento da temperatura, porém os valores foram mantidos dentro do intervalo proposto pela American Dietetic Association (2002) das consistências néctar, mel e pudim. Embora as três quantidades testadas de contraste de Bário tenham proporcionado imagens visíveis, avaliadas pelos juízes, os mesmos consideraram mais seguras aquelas observadas nas diluições de 25% e 50%, necessitando serem testadas outras situadas neste intervalo, uma vez que na diluição de 50% houve alteração da consistência néctar para mel. Um manual foi elaborado para orientação da padronização dos sete espessantes, nas três consistências e nas temperaturas testadas, bem como a sugestão de diluição do contraste de Bário no intervalo de 25% e 50%.
Videofluoroscopy (VDF) is considered a gold standard exam as an evaluation method for swallowing which requires that the patient ingests the Barium contrast in different consistencies so the oral and pharyngeal stages are evaluated with greater effectiveness. However, there is a difference between the viscosity of food with barium contrast for the VDF and thickened foods with the thickener, indicated subjectively in rehabilitation therapy. Therefore, the aim of this study was to standardize the amount of thickener to be added to infant formula in the following consistencies: nectar (N), honey (M) and (P) pudding in 2 environmental temperatures: (T1) and ranging from-40 degrees C to 44 C (T2); compare the average values of viscosities with seven brands of thickening agents most commonly used and available (E1, E2, E3, E4, E5, E6, E7) at temperatures T1 and T2; identify the minimal amount of barium contrast to be added to infant formula for good resolution in videofluoroscopy (50%, 25% and 12.5%), and elaborate a manual of food preparation to VFD in different consistencies (N, M, P) with Barium contrast. Seven brands of thickeners, an infant formula, and the average viscosity evaluated by Brookfield viscometer model DV-E, in two temperatures (above 40°C and environment) were used for standardization. Three dilutions (50%, 25% and 12.5%) of Barium contrast (Bariogel 100%) were used to evaluate the thickened milk by syringes into the VFD and the images obtained judged by two experienced speech language pathologists. Results revealed that the standardization of the amount of thickener to be added to infant formula to obtain the nectar, honey and pudding consistencies, in tested temperatures, varied according to the type of thickener, requiring the use of a manual for correct handling. Viscosity values decreased with increasing temperature, but the values were maintained within the range proposed by the American Dietetic Association (2002) regarding nectar, honey and pudding consistencies. Although the three tested quantities of Barium contrast have provided visible images, evaluated by the judges, those observed in dilutions of 25% and 50% were considered safer. It demanded tests in others situated in this range once in the dilution of 50% there was a change from nectar to honey consistency. A manual has been prepared for the guidance on the standardization of seven thickeners, in the three tested.
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Gatumel, Cendrine. "Précipitation du sulfate de baryum sous ultrasons : effets sur le micromélange et sur la nucléation." Toulouse, INPT, 1997. http://www.theses.fr/1997INPT033G.

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Les phenomenes physico-chimiques mis en jeu lors d'une precipitation sont particulierement complexes ; de plus, le phenomene est en soi tres rapide, et donc difficile a controler. Il est desormais connu que, lors d'une precipitation, la facon dont les reactifs sont melanges influe fortement sur la distribution de tailles des cristaux. De nouveaux moyens de mise en contact ont ete proposes recemment, et donc de nouvelles geometries, mais aussi l'utilisation de nouvelles technologies. Pour ameliorer la mise en contact des reactifs, une voie possible est d'utiliser les ultrasons de puissance qui ameliorent le transfert de matiere en provoquant, par le biais de la cavitation, une intense agitation microscopique. Apres avoir etudie en parallele l'effet des ultrasons sur le micromelange et sur la precipitation du sulfate de baryum, nous avons pu constater que l'effet sur le micromelange restait somme toute limite, alors que les ultrasons modifiaient considerablement la nucleation. Les ultrasons permettent en effet d'obtenir des cristaux plus fins, de tailles et de formes moins dispersees, et ce, quelles que soient les conditions de melange. Afin d'etudier plus precisement la nucleation sous ultrasons, et dans le but de comprendre comment les ultrasons pouvaient agir sur ce processus, nous avons dissocie experimentalement la nucleation et la croissance dans deux reacteurs continus en serie pouvant etre soniques separement. Cette etude a montre que les ultrasons provoquent de la nucleation secondaire, simultanee a la nucleation primaire, dont le mecanisme se rapprocherait de la nucleation secondaire de contact. Ce phenomene peut etre du a l'arrachement de germes en croissance a la surface des cristaux par les phenomenes accompagnant l'implosion de bulles de cavitation (onde de choc, jet de liquide). Une modelisation simple des cinetiques de nucleation et de croissance par bilan de population sur chacun des deux reacteurs nous a permis d'appuyer ces hypotheses.
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Aoun, Montaha. "Étude cinétique par une nouvelle méthode de la précipitation du sulfate de baryum à partir de différentes solutions réactives et à stoechiométrie variable." Vandoeuvre-les-Nancy, INPL, 1996. http://www.theses.fr/1996INPL095N.

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Cette étude avait été lancée en vue de modéliser les effets de mélange sur le processus de précipitation. La précipitation de sulfate de baryum a été choisie pour ce faire. Une nouvelle méthode basée sur des mesures en continu de la composition de la solution et de la D. T. C. A été développée pour déterminer les vitesses de nucléation et de croissance cristalline. Une première série d'expériences de précipitation spontanée stœchiométrique en réacteur fermé dans une unité pilote de 20 litres a été effectuée et les vitesses de nucléation et de croissance cristalline ont été déterminées. Une deuxième étude expérimentale a été menée pour déterminer les effets de la présence des contre-ions sur les lois cinétiques en variant le couple de réactifs. La vitesse de nucléation est sensible à ce choix alors que la vitesse de croissance est peu sensible. Enfin, l'effet de la non-stœchiométrie a été aussi étudié et s'est avéré très interessant: la cinétique de précipitation du sulfate de baryum est très sensible à la stœchiométrie. À la suite de cette étude, le choix de la précipitation de sulfate de baryum est déconseillé pour étudier des effets de mélange sur la précipitation
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Messaoudene, Nafa. "Etude de la formation et de l'inhibition des dépôts de sulfate de baryum dans les champs pétroliers : application au champ algérien de Tin Fouyé Tabankort." Toulouse, INPT, 1990. http://www.theses.fr/1990INPT031G.

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Dans les champs petroliers en depletion on utilise frequemment en recuperation assistee l'injection d'eau. Il se pose alors le probleme de compatibilite chimique entre l'eau d'injection et l'eau de gisement. Malheureusement on assiste dans bien des cas apres leur melange a la formation de depots dans les puits producteurs et/ou dans les installations de surface. Ils sont constitues dans la plupart des cas de sulfate de baryum. Il est donc indispensable d'inhiber ces precipitations en reagissant au niveau de la germination et de la croissance des cristaux par utilisation de produits appropries de type polyacrylate de poids moleculaire voisin de 2000. Pour optimiser ce type de traitement il est indispensable de maitriser les differents mecanismes mis en jeu. Compte tenu du nombre important de parametres intervenants, nous avons utilise dans notre etude la methodologie des plans factoriels fractionnaires permettant de hierarchiser ces parametres et d'en connaitre leurs interactions. Apres une etude en laboratoire, nous sommes passes a l'essai pilote sur le site de tin fouye tabankort en algerie. Les resultats sont tres satisfaisants et corroborent parfaitement les etudes en laboratoire
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Lebeau, Fabian. "Conditionnement céramique des boues STE. Synthèse de BaTiO3 à partir de BaSO4 et TiO2. Propriétés physicochimiques : frittage, lixiviation, irradiation." Limoges, 1995. http://www.theses.fr/1995LIMO0049.

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Les boues ste constituent un dechet radioactif principalement compose de sulfate de baryum. Pour elaborer un materiau ceramique a partir de ce dechet, la synthese solide-solide du titanate de baryum a partir de sulfate de baryum et d'anatase a ete etudiee. Une application des resultats au dechet simule est presentee. Trois proprietes physico-chimiques importantes pour le conditionnement ceramique de dechets radioactifs sont etudiees: le frittage, la lixiviation et l'irradiation du titanate de baryum elabore a partir du sulfate de baryum a haute temperature
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Zezulová, Anežka. "Vliv oxidu barnatého na tvorbu a vlastnosti portlandského slínku." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2014. http://www.nusl.cz/ntk/nusl-217077.

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Portland clinker is thanks to its large-scale production a continuously studied topic. Clinker, or Portland cement, is used for construction purposes, or for insulation and special applications. One of these special applications could be shielding of different types of radiation by making use of the content of barium ions. The present master’s thesis examines the influence of barium oxide on the formation and properties of Portland clinker, which could be, by incorporation of barium ions into the system, used as a binder for buildings resistant to various types of radiation. Barium sulfate and barium carbonate were added to the raw meal in order to prepare clinkers with different content of barium oxide. The effect of barium on the formation of clinker phases was studied (by XRD – Rietveld analysis and by the microscopic point integration), as well as the effects on the variations of temperature of the phase formation (TG-DTA) and the rate of alite formation under isothermal conditions. Furthermore, the ability of barium to become a part of clinker minerals was studied by SEM with EDS, and the solubility of barium phases by ICP-OES. The hydration of clinker minerals containing barium was studied by isothermal calorimetry.
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Books on the topic "Barium sulfide"

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Lueck, Larry. Petrologic and geochemical characterization of the Red Dog and other base-metal sulfide and barite deposits in the Delong Mountains, western Brooks Range, Alaska. Fairbanks, Alaska: School of Mineral Engineering, University of Alaska-Fairbanks, 1986.

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National Association of Corrosion Engineers. Laboratory screening test to determine the ability of scale inhibitors to prevent the precipitation of barium sulfate and/or strontium sulfate (for oil and gas production systems). Houston: NACE, 1997.

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The 2006-2011 World Outlook for Barium Compounds Excluding Barium Carbonate, Barium Sulfate, and Pigment Grades. Icon Group International, Inc., 2005.

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Parker, Philip M. The 2007-2012 World Outlook for Barium Compounds Excluding Barium Carbonate, Barium Sulfate, and Pigment Grades. ICON Group International, Inc., 2006.

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Parker, Philip M. The 2007 Import and Export Market for Natural Barium Sulfate (Barytes) and Natural Barium Carbonate (Witherite) Excluding Purified Barium Oxide in China. ICON Group International, Inc., 2006.

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Parker, Philip M. The World Market for Natural Barium Sulfate (Barytes) and Natural Barium Carbonate (Witherite) Excluding Purified Barium Oxide: A 2007 Global Trade Perspective. ICON Group International, Inc., 2006.

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The World Market for Natural Barium Sulfate (Barytes) and Natural Barium Carbonate (Witherite) Excluding Purified Barium Oxide: A 2004 Global Trade Perspective. Icon Group International, Inc., 2005.

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Laboratory screening test to determine the ability of scale inhibitors to prevent the precipiation of barium sulfate and/or strontium sulfate from solution (for oil and gas production systems). Houston: NACE, 2002.

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Book chapters on the topic "Barium sulfide"

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Bährle-Rapp, Marina. "Barium Sulfide." In Springer Lexikon Kosmetik und Körperpflege, 59. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_985.

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Hirota, E., K. Kuchitsu, T. Steimle, J. Vogt, and N. Vogt. "38 BaHS Barium hydrogen sulfide." In Molecules Containing No Carbon Atoms and Molecules Containing One or Two Carbon Atoms, 68. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-540-70614-4_39.

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Masikevych, Yurij, Musii Tseitlin, Valentyna Raiko, Oleksii Shestopalov, and Vladimir Panasenko. "Comparative Evaluation of the Contact Elements Efficiency for Barium Sulfide Solution Carbonization." In Lecture Notes in Mechanical Engineering, 177–86. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-06044-1_17.

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Bährle-Rapp, Marina. "Barium Sulfate." In Springer Lexikon Kosmetik und Körperpflege, 59. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_984.

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Gooch, Jan W. "Barium Sulfate." In Encyclopedic Dictionary of Polymers, 67. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_1075.

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Gooch, Jan W. "Precipitated Barium Sulfate." In Encyclopedic Dictionary of Polymers, 583. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_9367.

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de Oliveira, Mário Ferraz. "Barium Sulfate, Esophageal Inclusions." In Encyclopedia of Pathology, 90. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-40560-5_1563.

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Antony, Alice, and Pierre Le-Clech. "Barium Sulfate (BaSO4), Fouling Due to." In Encyclopedia of Membranes, 1–2. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-40872-4_1712-1.

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Hanor, Jeffrey S. "4. Barite-Celestine Geochemistry and Environments of Formation." In Sulfate Minerals, edited by Charles N. Alpers, John L. Jambor, and D. Nordstrom, 193–276. Berlin, Boston: De Gruyter, 2001. http://dx.doi.org/10.1515/9781501508660-006.

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Ithnin, R., D. J. Gilbert, S. Arnold, and J. V. Acrivos. "Sulfur intercalated into barium-copper-rare earth sulfides." In Chemical Physics of Intercalation, 507–9. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4757-9649-0_46.

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Conference papers on the topic "Barium sulfide"

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Fowles, Robert G., Simon J. M. Levey, and Clayton S. Smith. "An Advanced Method for Preparing Ferrous Sulfide and Testing Potential Inhibitors." In SPE International Oilfield Scale Conference and Exhibition. SPE, 2014. http://dx.doi.org/10.2118/spe-169808-ms.

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Abstract Ferrous-sulfide (iron II sulfide) scale typically forms in the wellbore under anaerobic conditions and may cause a reduction in well productivity. It has been proposed that ferrous ions react with bisulfide formed from dissolved hydrogen sulfide to form a complex iron bisulfide intermediate, which further reacts to produce black solid ferrous sulfide. Treatment of this type of scale typically involves mineral acids or chelants, which themselves provide additional challenges for pipeline integrity. The Weatherford flow assurance laboratory carries out tests that determine the best inhibitors for scale problems. Compared to calcite, barium, and gypsum scales, little work has been done to study prevention of ferrous sulfide scale. For calcite, barium, and gypsum scales, the dynamic-flow loop is commonly used. However, for ferrous-sulfide scale, there is a challenge for a quick and reliable test method. The preparation of ferrous sulfide under sour conditions is not straight forward due to both the difficulty in achieving sufficiently anaerobic conditions and the associated hazards of managing H2S. The presence of oxygen will result in ferric sulfide instead of ferrous sulfide. This paper describes in detail laboratory experiments to safely prepare ferrous sulfide scale using H2S and also test potential inhibitors. Comparisons were made between using metal sulfide instead of H2S. Using the H2S method to prepare ferrous sulfide provided a quick and robust way to select potential inhibitors under various conditions, which can be used to improve flow assurance assessments. This paper will demonstrate selected chemicals compared to tetrakis (hydroxymethyl) phosphonium sulfate (THPS) in preventing the formation of ferrous sulfide under sour conditions and ambient or elevated pressures and temperatures when applied at low concentrations. Some inhibitors that are successful under sour ferrous sulfide preparations are not effective when metal sulfide ions are used instead of H2S, which means potential inhibitors are being missed due to inappropriate test methods. Overall, a technological advancement was made with an anaerobic and sour method to test effectively ferrous sulfide inhibitors that would perform at low concentrations.
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Gamal, Hany, Saad Al-Afnan, Salaheldin Elkatatny, and Mohamed Bahgat. "Increasing ESP Lifetime by Employing Novel Non-Corrosive Acid System for Scales Removal." In SPE/ICoTA Well Intervention Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/204405-ms.

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Abstract The scales precipitated on the electric submersible pump (ESP) will lead to trapped heat, lower the motor's cooling capacity, decrease the pump lifetime, and finally pump failure. Removal of oil field scales commonly requires low pH acid that can cause corrosion, hydrogen sulfide evolution, ferric and ferrous hydroxide precipitation, iron sulfide as a by-product, and/or sulfur precipitation. Scales typically occur in the near wellbore, tubing, downhole pumps, and surface equipment. A mineral deposition is widespread with a change in pressure, temperature, pH, and incompatible mixing between injected seawater and formation water. This paper presents a new scale dissolver that is non-corrosive and has a high scale dissolution performance for barium sulfate scales. The study explains a series of comprehensive experimental lab tests such as X-ray diffraction (XRD), X-ray fluorescence (XRF), brine compositional analysis, fluid compatibility and stability, solubility test, precipitation tendency for the dissolved solids, and corrosion test to evaluate and simulate the field application of the new dissolver using two field scale types that mainly contain barium sulfate (BaSo4) scales. The obtained successful results indicated that the novel dissolver had a great dissolution efficiency for two real barium scale samples as the results showed that the dissolution rate recorded 91.3 and 78.4 % at 90 °C for samples 1 and 2 respectively. The novel dissolver showed a very low precipitation tendency for the scale dissolved solids (1.9 and 3.2 % for samples 1 and 2 respectively). Without any additives of corrosion inhibitors, the corrosion rate was 0.00376 lb/ft2 at 1000 psi and 50 °C for 6 hours. The obtained successful results will help to dissolve the barium sulfate scales, maintain the ESP performance, increase the lifetime, and save extra cost for the pump operational problems due to scale precipitations.
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Gamal, Hany, Salaheldin Elkatatny, Abdulaziz A. Al-Majed, Saad Al-Afnan, and Mohamed Bahgat. "Increasing ESP Lifetime by Employing Novel Non-Corrosive Acid System for Scales Removal." In International Petroleum Technology Conference. IPTC, 2022. http://dx.doi.org/10.2523/iptc-22512-ea.

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Abstract The scales precipitated on the electric submersible pump (ESP) will lead to trapped heat, lower the motor's cooling capacity, decrease the pump lifetime, and finally pump failure. Removal of oil field scales commonly requires low pH acid that can cause corrosion, hydrogen sulfide evolution, ferric and ferrous hydroxide precipitation, iron sulfide as a by-product, and/or sulfur precipitation. Scales typically occur in the near wellbore, tubing, downhole pumps, and surface equipment. A mineral deposition is widespread with a change in pressure, temperature, pH, and incompatible mixing between injected seawater and formation water. This paper presents a new scale dissolver that is non-corrosive and has a high scale dissolution performance for barium sulfate scales. The study explains a series of comprehensive experimental lab tests such as X-ray diffraction (XRD), X-ray fluorescence (XRF), brine compositional analysis, fluid compatibility and stability, solubility test, precipitation tendency for the dissolved solids, and corrosion test to evaluate and simulate the field application of the new dissolver using two field scale types that mainly contain barium sulfate (BaSo4) scales. The obtained successful results indicated that the novel dissolver had a great dissolution efficiency for two real barium scale samples as the results showed that the dissolution rate recorded 91.3 and 78.4 % at 90 °C for samples 1 and 2 respectively. The novel dissolver showed a very low precipitation tendency for the scale dissolved solids (1.9 and 3.2 % for samples 1 and 2 respectively). Without any additives of corrosion inhibitors, the corrosion rate was 0.00376 lb/ft2 at 1000 psi and 50 °C for 6 hours. The obtained successful results will help to dissolve the barium sulfate scales, maintain the ESP performance, increase the lifetime, and save extra cost for the pump operational problems due to scale precipitations.
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Subedi, Kamala Khanal, Ebin Bastola, Indra Subedi, Adam B. Phillips, Michael J. Heben, Nikolas J. Podraza, and Randy J. Ellingson. "Bifacial CdS/CdTe Solar Cell using Transparent Barium Copper Sulfide as a Hole Transport Layer." In 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC). IEEE, 2019. http://dx.doi.org/10.1109/pvsc40753.2019.8980936.

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Wang, Yanqing, Zhe Liu, Yuchen Zhang, and Jun Lu. "Exploiting Natural Nonconservative Geochemical Data to Obtain Reservoir Information." In SPE Annual Technical Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/206350-ms.

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Abstract Geochemical data in produced water contain important reservoir information but are seldomly exploited, especially for the nonconservative chemicals. Some conservative chemical data have been integrated in history matching workflow to obtain better knowledge of reservoirs. However, assuming reservoir chemicals being conservative is impractical because most chemicals are involved in interactions with other chemicals or reservoir rock, and mistakenly regarding nonconservative chemicals as being conservative can cause large error. Nevertheless, once the interactions can be accurately described, nonconservative chemical data can be used to obtain more reservoir information. In this work, a new physicochemical model is proposed to describe the transport of natural nonconservative chemicals (barium and sulfate) in porous media. Both physical reactions, such as ion adsorption and desorption, and chemical reactions, such as barite deposition, are integrated. Based on the new model, the ensemble smoother with multiple data assimilations (ES-MDA) method is employed to update reservoir model parameters by assimilating oil production rate, water production rate, and chemical data (barium and sulfate concentration). Data assimilation results show that integrating geochemical data in ES-MDA algorithm yields additional improvements in estimation of permeability. Besides, clay content distribution, which is critical in injection water breakthrough percentage calculation, can be accurately estimated with relative root mean square error (rRMSE) being as small as 0.1. However, mistakenly regarding nonconservative chemicals as conservative can cause large errors in reservoir parameters estimation. Accurately modeling the chemical interactions is crucial for integrating chemical data in history matching algorithm.
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Bhandari, Narayan, Manojkumar Bhandari, Ian Littlehales, and Sean Potter. "Developments on Metal Sulfide Scale Management in Oil and Gas Production." In SPE International Conference on Oilfield Chemistry. SPE, 2021. http://dx.doi.org/10.2118/204305-ms.

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Abstract Metal sulfide scaling issue in the oil and gas production continue to present significant flow assurance challenge. Recently, a novel polymeric chemistry that can effectively control FeS scale deposition in oil and gas production system was reported. However, how to manage finely dispersed FeS particulates at surface disposal facilities and whether this polymer is capable of mitigating ZnS and PbS deposition is largely unknown. Therefore, this study continues to seek an efficient treatment option for metal sulfide scale management. Static bottle tests and dynamic scale loop tests under anoxic conditions were conducted to understand the efficacy of the novel polymeric chemistry towards metal sulfide scaling control. To mimic various field conditions; individual metal sulfide (FeS, ZnS and PbS) as well as mixed scaling scenarios were simulated. Various coagulant and oxidant chemistries were tested to understand the impact of the upstream treatment on safe disposal of FeS nanoparticles at surface facilities. This novel polymeric chemistry was found to be not only effective towards FeS scaling control, but also towards dispersion of ZnS and PbS as well. The primary mechanism of metal sulfide scale deposition control is identified to be crystal growth inhibition and crystal surface modification. Laboratory test results indicated no negative impact of new chemistry on the performance of other chemicals (coagulant, oxidizer etc.). In fact, an enhanced efficiency of iron sulfide oxidation was observed possibly due to the large surface area of finely dispersed particles. A field throughput study results indicated superior performance compared to that of various incumbent chemistries. Based on the laboratory results, it is anticipated that this chemistry will provide a new treatment option for metal sulfide scaling/deposition control. Additionally, the new chemistry did not leave any negative footprint for safe disposal of metal sulfide particulate at surface. As opposed to the calcite/barite scale, nucleation inhibition of metal sulfide may not be desired as the dissolved sulfide may cause further corrosion/deposition downstream. Therefore, the value this paper brings to the management of metal sulfides is a systematic testing and evaluation approach which confirms dispersion rather than nucleation inhibition is effective control mechanism.
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Miller, James W., and John J. O'Neil. "Structure/Performance Relationships For Barium Sulfate And Strontium Sulfate Antiscalants." In SPE Latin American Petroleum Engineering Conference. Society of Petroleum Engineers, 1991. http://dx.doi.org/10.2118/23608-ms.

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McGinty, Jim, Thomas E. McHugh, and Elaine A. Higgins. "Barium Sulfate: A Protocol for Determining Higher Site-Specific Barium Cleanup Levels." In E&P Environmental and Safety Conference. Society of Petroleum Engineers, 2007. http://dx.doi.org/10.2118/106802-ms.

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Yue, Zhiwei David, Andrew Slocum, Xiaohong Lucy Tian, Linping Ke, Megan Westerman, and John Hazlewood. "An Integrated Scale Protection Package for Offshore Fractured Wells Under Designed Shut-In Extension." In SPE International Conference on Oilfield Chemistry. SPE, 2021. http://dx.doi.org/10.2118/204363-ms.

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Abstract After fracturing, it is common practice to leave offshore wells shut-in from days to weeks for operational purposes. During the recent historic decline of demand for global crude, a trend has been witnessed to shut in even newly fractured wells under design for an extended period. The cause of these extended shut-ins can be attributed to various factors including operational logistics as well as economic factors. The shut-in extension brings some unique scaling challenges for well designs. In this paper, an integrated scale inhibitor (SI)/fracturing fluid package is presented with detailed laboratory prerequisites data to validate its efficacy for long-term scale protection during the extended shut-in. Utilizing seawater in offshore fracturing can provide significant cost savings to an operation. Unfortunately, in regions with barium-rich formations, the use of seawater brings tremendous barite scaling risk. In order to solve this challenge, the investigation focused on the selection of the most effective inhibitors for long-term barite inhibition under the simulated reservoir conditions. Along with the scale inhibitor selection, the crosslinked gel had to be carefully optimized to eliminate any potential negative interference the gel additives could impart to the performance of the inhibitor. Furthermore, the inhibitor was tested in the crosslinking system to meet optimum rheology requirements. Utilizing the broken gel containing the designed inhibitor package, barite precipitation could be prevented for months under the simulated testing conditions. Due to high levels of sulfate from seawater and the barium originating from the formation, barite scale formed immediately upon mixing of the two types of water in absence of the appropriate scale inhibitors. Solid scale products featuring slow releasing of the inhibitor ingredients was proven insufficient for this application. With extensive laboratory screening, the candidate chemistry demonstrated great brine-calcium tolerance, superior scale inhibition performance for both sulfate and carbonate scales, and the minimum interferences for the crosslinking engineering to meet necessary proppant carrying capacity. To mimic the gel-breaking process and heterogeneous bleeding from the formation water, the inhibitor was crosslinked with the gel at various loading rates (1 gpt to 10 gpt) and broken at the elevated reservoir temperature, then mixed with the different ratios of the formation water. Reliable scale inhibition performance was achieved for an extended period of time for up to six weeks. Incorporating SI into the fracturing stimulation package is a convenient method for operators to include a scale-control program into well-defined fracturing designs with minimal adjustment and also add significant cost-saving for offshore logistics and rig time (Fitzgerald, et al., 2008). The scale inhibitor product presented in this paper shows a superior solution to protect assets from scale deposition for an extended shut-in period.
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Mahmud, Walid Mohamed, and Mansur Ermila. "Case Study: Barium Sulfate Scale Removal by Dynamic Underbalance." In SPE International Conference and Exhibition on Formation Damage Control. Society of Petroleum Engineers, 2020. http://dx.doi.org/10.2118/199232-ms.

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Reports on the topic "Barium sulfide"

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Liseroudi, M. H., O. H. Ardakani, P. K. Pedersen, R. A. Stern, J M Wood, and H. Sanei. Diagenetic and geochemical controls on H2S distribution in the Montney Formation, Peace River region, western Canada. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/329785.

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The Lower Triassic Montney Formation is a major siltstone dominated unconventional tight gas play in the Western Canadian Sedimentary Basin (WCSB). In the Peace River region, the Montney Formation contains a regionally variable amount of hydrogen sulfide (H2S) in gas-producing wells with western Alberta's wells having the highest concentrations. Previous studies on the source and distribution of H2S in the Montney Formation mainly focused on variations of H2S concentration and its relationship with other hydrocarbon and non-hydrocarbon gases, sulfur isotope composition of H2S, as well as organo-sulfur compounds in the Montney Formation natural gas. None of those studies, however, focused on the role of diagenetic and geochemical processes in the formation of dissolved sulfate, one of the two major ingredients of H2S formation mechanisms, and pyrite within the Montney Formation. According to the results of this study, the Montney Formation consists of two different early and late generations of sulfate minerals (anhydrite and barite), mainly formed by the Montney Formation pore water and incursion of structurally-controlled Devonian-sourced hydrothermal sulfate-rich fluids. In addition, pyrite the dominate sulfide mineral, occurred in two distinct forms as framboidal and crystalline that formed during early to late stages of diagenesis in western Alberta (WAB) and northeast British Columbia (NEBC). The concurrence of the late-stage anhydrite and barite and various types of diagenetic pyrite with high H2S concentrations, particularly in WAB, their abundance, and spatial distribution, imply a correlation between the presence of these sulfate and sulfide species and the diagenetic evolution of sulfur in the Montney Formation. The sulfur isotope composition of anhydrite/barite, H2S, and pyrite demonstrates both microbial and thermochemical sulfate reduction (MSR and TSR) controlled the diagenetic sulfur cycle of the Montney Formation. The relationship between the delta-34S values of the present-day produced gas H2S and other sulfur-bearing species from the Montney and other neighboring formations verifies a dual native and migrated TSR-derived origin for the H2S gas with substantial contributions of in situ H2S in the Montney reservoir.
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