Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 40 for “"sodium carbonate"”.
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Corrosion by molten mixtures of sodium carbonate and vanadium pentoxide
… of heavy petroleum fuels which contain sodium and vanadium becomes very severe when the temperature of the metal exceeds 550 to 600°C, thus placing undesirable limitations on both the manufacturers and users of heavy fuel oil fired boilers and turbines. To contribute to the understanding …
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Experimental study of the grain model using the sulfur dioxide-sodium carbonate reaction
Includes bibliographical references (pages 198-204).
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A study of fast reactions in nozzle type reactors
… studies involving aqueous solutions of sodium carbonate (Na₂Co₂) and sulphuric acid (H₂SO₄) were carried out at varying molar ratios and flow rates in 0.55 x 10¯³ m³ and 5.13 x 10¯³ m³ nozzle reactors respectively. The product samples were determined volumetrically; the yield of the …
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Characterisation and improvement of the rehydration behaviour of high-protein milk powder
… to analyse the effect of pH on rehydrating MPI. Sodium carbonate, as an alkali food additive, was firstly studied at rehydrating dairy powder. However, alkalization of MPI followed by neutralization has been thoroughly investigated. Consequently, considering the effect of calcium chelation on …
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Experimental and theoretical studies on the nucleation, growth and habit modification of some inorganic carbonates, phosphates and sulphates
… and growth of some inorganic sulphates and carbonates, in view of their growing importance as enviromentally friendly high surface area powders in detergent applications. Predictions of the crystal morphology based on lattice geometry laws have been obtained and compared to the growth …
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o-Nitrosophenol complexes and their synthetic potential
… The hydrochlorides on neutralisation with sodium carbonate gave, in most cases, the parent N(2-hydroxybenzene)- iminotriphenyl phosphorene.
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Analysis and reproduction of geopolymer concrete
… optimum texture was produced when the amount of sodium carbonate and lime are proportionally increased relative to the rest of the materials.
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An investigation of a Hudson River clay deposit of the Terry Brick Corp
… Goldrick clay with shale, and the addition of sodium carbonate and chestnut extract as electrolytes in the stiff mud process were investigated. The uses of Goldrick clay as a slip clay to produce a glaze was investigated. Particle size determinations of samples taken from points over the entire …
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The effect of carbonate concentration in cyanide metal plating solutions
… of this study was to determine the effect of carbonate concentration in copper, cadmium, silver, and gold cyanide plating solutions on the properties of the deposits and the plating range. A 267 milliliter Hull cell was used to investigate this problem. By using this apparatus the …
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Pore-scale characterization of transverse mixing-induced calcium carbonate precipitation of relevance to geological carbon sequestration
This study examines the reaction between carbonate and calcium to precipitate calcium carbonate in an experimental model. This model is a small micro-fluidic device that incorporates a flow channel with an imprinted homogeneous pore structure to replicate the porous nature of groundwater flow. …
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Synthesis of dichlorine monoxide
… the reaction of Cl<sub>2</sub> with anhydrous sodium carbonate. The chlorine was diluted to approximately 25 mole percent with Nitrogen. The bed was periodically fluidized ("pulsed-fluidization") using only nitrogen. The surface the glass reactor was heated from 290° to 300°. Analyses were …
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Acyclic Imidate and Thiomidate Normal-Oxides: Nitrones of Esters and Thioesters (alpha-Alkoxynitrones, Alpha-Alkylthionitrones, Normal - Alkylthiohydroxamic Acids, X-Ray)
… from the corresponding hydroiodides with sodium carbonate or bicarbonate in water. The thioimidate N-oxides and their hydroiodides were characterized spectroscopically and their equilibrium ratios were determined in bromobenzene and acetone, respectively. The E/Z stereochemistry of the …
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New sustainable approaches for control of postharvest diseases of citrus fruit
… in different combined mixtures with hot water, sodium carbonate, sodium bicarbonate, ASM and chitosan. Combined applications of sodium bicarbonate, hot water and biocontrol agents efficiently controlled green mold when treatments were applied 24 and 48 hours before the pathogen inoculation. When …
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Understanding The Mechanism Of Gaseous Iodine Capture Using Sodium-Loaded Carbon Foams
… surface area carbon monolithic foam with sodium as a new approach for capturing 129I, a radioactive volatile emitted during the processing of nuclear waste. Iodine is emitted during the vitrification processing of low activity waste at the Hanford site as the glass melt is heated to above …
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Manufacturing of synthetic soda ash
… study the manufacturing of synthetic soda ash (sodium carbonate, Na2CO3) on an industrial scale. Currently all Soda ash that is used in South Africa for manufacturing glass is imported at a high cost, and the company Nampak Wiegand Glass (South Africa) is investigating the possibility to locally …
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Biological and Chemical Oxidation of Sulfidic Minerals at Alkaline pH
… used for this study. For chemical oxidation, the carbonate effect which occurs due to the presence of sodium carbonate and bicarbonate was evaluated. Various parameters such as pH, temperature, pulp density, time, and changes in media were altered to determine the optimal oxidative parameters. …
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Sorption of Boron and Chromium Onto Solids of Environmental Significance: Implications for Sampling and Removal in Water Treatment
… In relation to treatment, it was determined that sodium carbonate softening at pH 10.3 is a viable method of removing various inorganic contaminants including chromium from drinking water sources. The nationwide survey revealed that removals varied widely and were dependent on solution …
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