Relevant bibliographies by topics / Aerated sulfuric acid aqueous solutions

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Aerated sulfuric acid aqueous solutions'

Author: Grafiati
Published: 4 June 2021
Last updated: 2 February 2022

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Journal articles on the topic "Aerated sulfuric acid aqueous solutions"

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Autsavapromporn, Narongchai, Jintana Meesungnoen, Ianik Plante, and Jean-Paul Jay-Gerin. "Monte Carlo simulation study of the effects of acidity and LET on the primary free-radical and molecular yields of water radiolysis — Application to the Fricke dosimeter." Canadian Journal of Chemistry 85, no. 3 (March 1, 2007): 214–29. http://dx.doi.org/10.1139/v07-021.

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Monte Carlo simulations are used to investigate the effects of acidity (pH) on the primary yields of various chemical species produced in the radiolysis of de-aerated aqueous sulfuric acid solutions over the range from neutral solution to 0.4 mol/L H2SO4. The effects of the quality of radiation, measured in terms of linear energy transfer (LET), have also been studied for LET varying from ~0.3 to 15 keV/µm at ambient temperature. Our results show that an increase in acidity (1 < pH < 4) leads to an increase in the yield [Formula: see text] of the "reducing" free radicals (hydrated electron and H• atom) and a slight increase in G·OH and [Formula: see text], while there is a slight decrease in [Formula: see text] At pH < 1, •OH radicals react with HSO4- anions to form SO4·– radicals, resulting in a steep decrease in G.OH. By contrast, in the range of pH from ~4 to 7, the calculated yield values are independent of sulfuric acid concentration. In both neutral water and 0.4 mol/L H2SO4 (pH 0.46) solutions, the primary molecular yields increase upon increasing LET to ~15 keV/µm with a concomitant decrease in those of free radicals. As an exception, GH. at first increases with LET, reaching a maximum near 6.5 keV/µm before decreasing steeply at higher LET. The results obtained are generally in good agreement with available experimental data over the whole acidity and LET ranges studied. Finally, as an application, we have simulated the radiation-induced oxidation of ferrous sulfate solutions in aerated aq. 0.4 mol/L H2SO4 (Fricke dosimeter) as a function of time up to ~50 s and addressed the effects of LET on the resulting ferric ion yield at 25 °C. The production of Fe3+ ions is highly sensitive to free-radical yields, especially H• atoms (via formation of HO2•), resulting in a marked decline of G(Fe3+) with increasing LET. The general trend of the observed variation of G(Fe3+) with radiation quality is well reproduced by our computed Fe3+ ion yield values.Key words: liquid water, acidic (H2SO4) aqueous solutions, radiolysis, free-radical and molecular yields, linear energy transfer (LET), Fricke dosimeter, Monte Carlo simulations.
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Sanders, Stephen J. "Modeling organics in aqueous sulfuric acid solutions." Industrial & Engineering Chemistry Process Design and Development 24, no. 4 (October 1985): 942–48. http://dx.doi.org/10.1021/i200031a008.

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Casas, J. M., F. Alvarez, and L. Cifuentes. "Aqueous speciation of sulfuric acid–cupric sulfate solutions." Chemical Engineering Science 55, no. 24 (December 2000): 6223–34. http://dx.doi.org/10.1016/s0009-2509(00)00421-8.

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Kameda, Yasuo, Kiyohiko Hosoya, Shuji Sakamoto, Hirohito Suzuki, Takeshi Usuki, and Osamu Uemura. "Hydrogen-bonded structure in aqueous sulfuric acid solutions." Journal of Molecular Liquids 65-66 (November 1995): 305–8. http://dx.doi.org/10.1016/0167-7322(95)00882-8.

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Hayduk, Walter, Haruki Asatani, and Benjamin C. Y. Lu. "Solubility of sulfur dioxide in aqueous sulfuric acid solutions." Journal of Chemical & Engineering Data 33, no. 4 (October 1988): 506–9. http://dx.doi.org/10.1021/je00054a033.

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Kruchinin, N. P., V. V. Romanov, V. G. Kulichikhin, A. S. Semenova, and V. E. Sorokin. "Creep of oksalon fibres in aqueous sulfuric acid solutions." Fibre Chemistry 16, no. 6 (1985): 431–33. http://dx.doi.org/10.1007/bf00546266.

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Lisitsyn, Yu A., and L. V. Grigor’eva. "Electrochemical amination. Dilute aqueous organic solutions of sulfuric acid." Russian Journal of Electrochemistry 45, no. 2 (February 2009): 132–38. http://dx.doi.org/10.1134/s1023193509020025.

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Jankovska, Katica, Lidija Soptrajanova, and Ilinka Spirevska. "Protonation of maleic and fumaric acid in aqueous sulfuric acid solutions." Journal of the Serbian Chemical Society 65, no. 10 (2000): 695–708. http://dx.doi.org/10.2298/jsc0010695j.

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The protonations of maleic and fumaric acid in an acidic medium (aqueous solutions of sulfuric acid) were followed spectrophotometrically at room temperature. The acid-base equilibria were characterised qualitatively and quantitatively. The pKBH+ values were determined using the Hammett equation, employing several acid functions in order to determine which of them describes best the protonation process of the studied organic acids. The thermodynamic pKBH+ values as well as those of the solvation parameters m, m* and ? and of the thermodynamic protonation constants (or, rather, the pKa,p values) were also defermined. The method of characteristic vector analysis (CVA) was used to reconstruct the experimental spectra.
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Zhestkova, T. P., T. N. Zhukova, and I. E. Makarov. "Specifics of radiolytic degradation of oxalic acid in aerated aqueous solutions." High Energy Chemistry 45, no. 2 (March 2011): 85–88. http://dx.doi.org/10.1134/s0018143911020159.

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10

Keeffe, J. R., A. J. Kresge, and J. Toullec. "Acid-catalyzed enolization of acetophenone: catalysis by bisulfate ion in sulfuric acid solutions." Canadian Journal of Chemistry 64, no. 6 (June 1, 1986): 1224–27. http://dx.doi.org/10.1139/v86-203.

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Rates of acid-catalyzed enolization of acetophenone in dilute aqueous solution, measured under conditions where the solvated proton is the only acidic species present, give a hydrogen ion catalytic coefficient, [Formula: see text], that is 35% smaller than the value obtained by X acidity function extrapolation of measurements made in moderately concentrated sulfuric acid solutions. The difference may be attributed to catalysis by bisulfate ion in the sulfuric acid solutions; this is supported by direct measurement of the bisulfate ion catalytic coefficient in dilute sulfuric acid. This revised value of [Formula: see text] leads to new, but only slightly different, values of the keto–enol equilibrium constant for acetophenone in aqueous solution, pKE = 7.96 ± 0.04, the acidity constant for acetophenone ionizing as a carbon acid, [Formula: see text] and the encounter-controlled rate constant for the reaction of acetophenone enol with molecular bromine, k = (3.2 ± 0.4) × 109 M−1 s−1.
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Dissertations / Theses on the topic "Aerated sulfuric acid aqueous solutions"

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Tippayamontri, Thititip. "Simulation Monte-Carlo de la radiolyse du dosimètre de Fricke par des neutrons rapides." Mémoire, Université de Sherbrooke, 2009. http://savoirs.usherbrooke.ca/handle/11143/4013.

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Monte-Carlo calculations are used to simulate the stochastic effects of fast neutron-induced chemical changes in the radiolysis of the ferrous sulfate (Fricke) dosimeter. To study the dependence of the yield of ferric ions, G(Fe[superscript 3+]), on fast neutron energy, we have simulated, at 25 [degree centigrade], the oxidation of ferrous ions in aerated aqueous 0.4 M H[subscript 2]SO[subscript 4] (pH 0.46) solutions when subjected to ~0.5-10 MeV incident neutrons, as a function of time up to ~50 s. The radiation effects due to fast neutrons are estimated on the basis of track segment (or"escape") yields calculated for the first four recoil protons with appropriate weighting according to the energy deposited by each of these protons. For example, a 0.8-MeV neutron generates recoil protons of 0.505, 0.186, 0.069, and 0.025 MeV, with linear energy transfer (LET) values of ~41, 69, 82, and 62 keV/[micro]m, respectively. In doing so, we consider that further recoils make only a negligible contribution to radiation processes. Our results show that the radiolysis of dilute aqueous solutions by fast neutrons produces smaller radical yields and larger molecular yields (relative to the corresponding yields for the radiolysis of water by [superscript 60]Co [gamma]-rays or fast electrons) due to the high LET associated to fast neutrons. The effect of recoil ions of oxygen, which is also taken into account in the calculations, is shown to decrease G(Fe[superscript 3+]) by about 10%. Our calculated values of G(Fe[superscript 3+]) are found to increase slightly with increasing neutron energy over the energy range covered in this study, in good agreement with available experimental data. We have also simulated the effect of temperature on the G(Fe[superscript 3+]) values in the fast neutron radiolysis of the Fricke dosimeter from 25 to 300 [degree centigrade]. Our results show an increase of G(Fe[superscript 3+]) with increasing temperature, which is readily explained by an increase in the yields of free radicals and a decrease in those of molecular products. For 0.8-MeV incident neutrons (the only case for which experimental data are available in the literature), there is a ~23% increase in G(Fe[superscript 3+]) on going from 25 to 300 [degree centigrade]. Although these results are in reasonable agreement with experiment, more experimental data, in particular for different incident neutron energies, would be needed to test more rigorously our Fe[superscript 3+] ion yield results at elevated temperatures.
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Vielma, T. (Tuomas). "Thermodynamic properties of concentrated zinc bearing solutions." Doctoral thesis, Oulun yliopisto, 2019. http://urn.fi/urn:isbn:9789526223193.

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Abstract Zinc is a common metal, and has a central role in the production of galvanised bulk products, battery applications and fertilisers. Its production relies mainly on the leaching of zinc minerals with sulfuric acid, followed by purification and electrowinning. In this thesis an internally consistent thermodynamic model for the industrially important ZnSO₄-H₂SO₄-H₂O system was developed. Model parameters were optimised using available literature data and new experimental freezing point and density data determined in this work. With Gibbs energy minimisation algorithms embedded in commercial software, such as ChemSheet and FactSage, the developed model can be used to calculate easily phase equilibria and thermodynamic properties of aqueous zinc sulfate solutions and solid zinc sulfate phases, including activity coefficients, enthalpy changes, heat capacities, densities and solubilities, in a wide range of temperature, pressure and sulfuric acid concentrations. Solution non-ideality was treated with the original Pitzer model with electrostatic mixing terms included. Applicability of thermodynamic approach and the developed model was demonstrated by two separate case studies on the hydrometallurgical zinc process. Precipitation of amorphous silica during hot acid leach was studied experimentally. Its solubility in the process solution was also successfully predicted using the thermodynamic approach. To study crystallisation of gypsum during the gypsum precipitation stage, the model was expanded by addition of the Ca²⁺ ion. The model calculations showed good agreement with the experienced Ca²⁺ levels. The results of this thesis have found immediate use in understanding the various stages of the electrolytic zinc process. The obtained results also form a basis on which new, more advanced tools for managing and studying the process can be developed
Tiivistelmä Sinkki on yleinen metalli, ja sillä on keskeinen rooli sinkittyjen terästuotteiden, paristojen ja jopa lannoitteiden valmistuksessa. Sen tuotanto perustuu sinkkipitoisten mineraalien rikkihappoliuotukseen, muodostuneen prossessiliuoksen puhdistukseen ja lopulta metallisen sinkin elektrolyysitalteenottoon. Tässä työssä kehitettiin termodynaaminen malli teollisesti tärkeälle ZnSO₄-H₂SO₄-H₂O -systeemille. Malliparametrit määritettiin kirjallisuudessa esitetyistä tuloksista ja tässä työssä tehdyistä uusista jäätymispiste- ja tiheysmittauksista. Käyttämällä kaupallisia Gibbsin energian minimointialgoritmiin perustuvia ohjelmistoja, kuten ChemSheet tai FactSage, tässä työssä kehitetyllä mallilla voidaan helposti kuvata sinkkisulfaattipitoisten vesiliuosten faasitasapainoja ja laskea systeemin termodynaamisia ominaisuuksia. Malliin sisällytettyihin ominaisuuksiin kuuluvat systeemin komponenttien aktiivisuudet, entalpiamuutokset, lämpökapasiteetit sekä tiheydet laajalla lämpötila-, paine- ja rikkihapon pitoisuusalueella. Liuoksen epäideaalisuutta kuvattiin Pitzerin ioniaktiivisuusmallilla. Työssä sinkkisulfaattiliuoksille kehitettyä mallia testattiin kahdessa sinkintuotannon kannalta keskeisessä tapaustutkimuksessa. Amorfisen piidioksidin saostumista vahvahappoliuotuksen aikana tutkittiin kokeellisesti ja laskennallisesti. Amorfisen piidioksidin liukoisuus prosessiliuokseen ennustettiin onnistuneesti. Kipsinpoistoprosessin tutkimusta varten mallia laajennettiin lisäämällä siihen Ca²⁺-ioni. Mallilla laskettiin kipsin liukoisuus prosessiliuokseen. Saadut tulokset vastasivat hyvin käytännössä havaittuja arvoja. Tutkimuksen tuloksia on suoraan hyödynnetty sinkintuotantoprosessin ymmärtämisessä. Ne myös mahdollistavat jatkossa edistyneempien työkalujen kehittämisen niin prosessin hallintaan kuin tutkimukseenkin
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Book chapters on the topic "Aerated sulfuric acid aqueous solutions"

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Böttcher, Markus, and Thomas Koop. "Immersion Freezing in Emulsifi ed Aqueous Sulfuric Acid Solutions Containing AgI Particles." In Nucleation and Atmospheric Aerosols, 466–70. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-6475-3_93.

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Kameda, Yasuo, Kiyohiko Hosoya, Shuji Sakamoto, Hirohito Suzuki, Takeshi Usuki, and Osamu Uemura. "Hydrogen-bonded structure in aqueous sulfuric acid solutions." In Studies in Physical and Theoretical Chemistry, 305–8. Elsevier, 1995. http://dx.doi.org/10.1016/s0167-6881(06)80796-2.

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Conference papers on the topic "Aerated sulfuric acid aqueous solutions"

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Subagja, Rudi, Iwan Setiawan, and Januar Irawan. "Nickel dissolution from nickel matte into the aqueous sulfuric acid solutions." In 1ST INTERNATIONAL SEMINAR ON ADVANCES IN METALLURGY AND MATERIALS (i-SENAMM 2019). AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0017385.

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Subagja, Rudi, Iwan Setiawan, and Ahmad Rizky Rhamdani. "Copper dissolution into the aqueous sulfuric acid solutions from printed circuit board waste sludge." In PROCEEDINGS OF THE 4TH INTERNATIONAL SEMINAR ON METALLURGY AND MATERIALS (ISMM2020): Accelerating Research and Innovation on Metallurgy and Materials for Inclusive and Sustainable Industry. AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0060152.

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Alhelfi, Ali, and Bengt Sunden. "Predictions of Temperature and Pressure Fields due to Collapse of a Bubble in Sulfuric Acid Solution Under Ultrasound." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-37595.

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A gas bubble under the influence of an ultrasonic field so strong to destroy any material due to high pressures and temperatures reached during the collapse, is the topic of the present paper. In the current work, simulations have been performed to describe the radial dynamics of a gas (argon) bubble being strongly forced to periodic oscillation in a highly viscous liquid like aqueous sulfuric acid solution. The basic equations for nonlinear bubble oscillation in a sound field are given, together with a survey of some important existing studies. All hydrodynamics forces acting on the bubble are considered in the typical solutions. Bubble oscillation and its characteristics under the action of a sound wave are presented. The theory permits one to predict correctly the bubble radius–time behavior and the characteristics of a microsize bubble in sulfuric acid solutions, such as the peak temperature and pressure fields generated at this occasion.
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