Academic literature on the topic 'Hydrated and anhydrous salts'

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Journal articles on the topic "Hydrated and anhydrous salts"

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M., L. Parmar, and Sharma Praveen. "A comparative study on viscosities of some hydrated and anhydrous salts of transition metal sulphates and magnesium sulphate in water at different temperatures." Journal of Indian Chemical Society Vol. 85, Nov 2008 (2008): 1146–47. https://doi.org/10.5281/zenodo.5820476.

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Department of Chemistry, Himachal Pradesh University, Summer Hill, Shimla-171 005, Himachal Pradesh, India <em>Manuscript received 31 March 2008, revised 26 June 2008, accepted 25 August 2008</em> Relative viscosities for the aqueous solutions of some hydrated and anhydrous salts of transition metal sulphates viz. cobalt sulphate, nickel sulphate, copper sulphate and zinc sulphate, and magnesium sulphate have been determined (in the concentration range 0.005-0.100 &plusmn; 0.001 mol kg-1) at five equidistant [298.15, 303.15, 308.15, 313.15 and 318.15 K]&nbsp;temperatures. The data have been ev
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Sugiyarto, KH, DC Craig, AD Rae, and HA Goodwin. "Structural, Magnetic and Mössbauer Spectral Studies of Salts of Bis[2,6-bis(pyrazol-3-yl)pyridine]iron(II)—a Spin Crossover System." Australian Journal of Chemistry 47, no. 5 (1994): 869. http://dx.doi.org/10.1071/ch9940869.

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The magnetic and Mossbauer spectral properties of hydrated and anhydrous complex salts [Fe( bpp )2] X2, where bpp = [2,6-bis(pyrazol-3-yl)pyridine] and X = PF6, BF4, Br, I, NO3, are indicative of a temperature-induced singlet (1A1) ↔ quintet (5T2) transition in the complex cation. The nature of the transition depends on the anion and the degree of hydration. The transition is displaced to lower temperatures in the anhydrous species and for the hydrated is only partial above room temperature. The transition in the hydrated hexafluorophosphate salt occurs in two steps, and that in the anhydrous
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Boycov, Denis E., Ksenia V. Drozd, Alex N. Manin, Andrei V. Churakov, and German L. Perlovich. "New Solid Forms of Nitrofurantoin and 4-Aminopyridine Salt: Influence of Salt Hydration Level on Crystal Packing and Physicochemical Properties." Molecules 27, no. 24 (2022): 8990. http://dx.doi.org/10.3390/molecules27248990.

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The crystallization of the poorly soluble drug nitrofurantoin (NFT) with 4-aminopyridine (4AmPy) resulted in three multicomponent solid forms with different hydration levels: anhydrous salt [NFT+4AmPy] (1:1), salt monohydrate [NFT+4AmPy+H2O] (1:1:1), and salt tetrahydrate [NFT+4AmPy+H2O] (1:1:4). Each salt was selectively prepared by liquid-assisted grinding in the presence of acetonitrile or ethanol/water mixture at a specific composition. The NFT hydrated salts were characterized using single crystal X-ray diffraction. The [NFT+4AmPy+H2O] salt (1:1:1) crystallized as an isolated site hydrate
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Ferenc, Wieslawa, Agnieszka Walkóv-Dziewulska, and Janusz Chrusciel. "Spectral and thermal behaviors of rare earth element complexes with 3,5-dimethoxybenzoic acid." Journal of the Serbian Chemical Society 68, no. 10 (2003): 751–63. http://dx.doi.org/10.2298/jsc0310751f.

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The conditions for the formation of rare earth element 3,5-dimethytoxybenzoates were studied and their quantitative composition and solubilities in water at 293 K were determined. The complexes are anhydrous or hydrated salts and their solubilities are of the orders of 10-5 ? 10-4 mol dm-3. Their FTIR, FIR and X-ray spectra were recorded. The compounds were also characterized by thermogravimetric studies in air and nitrogen atmospheres and by magnetic measurements. All complexes are crystalline compounds. The carboxylate group in these complexes is a bidentate chelating ligand. On heating in a
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Braun, Doris, and Ulrich Griesser. "Insights into hydrate formation and stability of morphinanes." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C991. http://dx.doi.org/10.1107/s2053273314090081.

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The formation of multi-component crystals with water (hydrates) is a widespread phenomenon among organic molecules. Hydrate formation is of high practical relevance for industrially used materials, as it affects their physicochemical properties. [1,2] To exclude water or moisture in industrial processes is often difficult. Therefore knowledge about the existence and stability of hydrates and the understanding and control of the anhydrate/hydrate balance is mandatory for avoiding manufacturing problems. In order to improve our understanding of hydrate formation we selected representative substa
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Tan, Shuya, Yasuhito Sekine та Masayuki Kuzuhara. "Spatially Resolved Observations of Europa’s Surface with Subaru/IRCS at 1.0–1.8 μm: Upper Limits to the Abundances of Hydrated Cl-bearing Salts". Planetary Science Journal 3, № 3 (2022): 70. http://dx.doi.org/10.3847/psj/ac596c.

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Abstract Recent infrared observations at 1.5–4.0 μm using large ground-based telescopes have suggested that Cl-bearing salts are likely present on Europa’s surface as non-ice materials. The chemical compositions of those Cl-bearing salts are key to understanding Europa’s ocean chemistry and habitability. Here we report the results of ground-based telescope observations of Europa across two wavelength ranges, 1.0–1.5 μm and 1.5–1.8 μm, of which the former range includes absorption features due to some hydrated Cl-bearing salts. We obtained spatially resolved reflectance spectra using the Subaru
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Ferenc, W., K. Czapla, J. Sarzynski, and A. Zwolinska. "Comparison of some properties of 2,3 – and 3,4 – dimethoxybenzoates of Cu(II), Co(II) and Nd(III)." Eclética Química Journal 33, no. 2 (2018): 07. http://dx.doi.org/10.26850/1678-4618eqj.v33.2.2008.p07-12.

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The physicochemical properties of 2,4-, and 3,4-dimethoxybenzoates of Cu(II), Co(II) and Nd(III) were studied and compared to observe the -OCH3 substituent positions in benzene ring on the character of complexes. The analysed compounds are crystalline hydrated or anhydrous salts with colours depending on the kind of central ions: blue for Cu(II), pink for Co(II) and violet for Nd(III) complexes. The carboxylate groups bind as monodentate, bidentate bridging or chelating and even tridentate ligands. Their thermal stabilities were studied in air at 293-1173K. When heated the hydrated complexes r
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Ferenc, Wieslawa, Agnieszka Walkow-Dziewulska, Pawel Sadowsk, and Janusz Chrusciel. "Spectral, thermal and magnetic characterization of 2, 3-dimethoxybenzoates of Co(II), Ni(II) and Cu(II)." Journal of the Serbian Chemical Society 70, no. 6 (2005): 833–42. http://dx.doi.org/10.2298/jsc0506833f.

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Complexes of 2,3-dimethoxybenzoates of Co(II), Ni(II) and Cu(II) have been synthesized as hydrated or anhydrous polycrystalline solids and characterized by elemental analysis, IR, FIR and electronic spectroscopy, magnetic studies and X-ray diffraction measurements. The carboxylate groups bind as monodentate or symmetrical, bidentate chelating and bridging ligands. The thermal stabilities were determined in air. When heated they dehydrate to form anhydrous salts which are decomposed to the oxides of the respective metals. The magnetic susceptibilities of the complexes were measured over the ran
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Ferenc, Wieslawa, and Agnieszka Walków-Dziewulska. "Complexes of light lanthanides with 2,4-dimethoxybenzoic acid." Journal of the Serbian Chemical Society 65, no. 1 (2000): 27–35. http://dx.doi.org/10.2298/jsc0001027f.

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The complexes of light lanthanides with 2,4-dimethoxybenzoic acid of the formula: Ln(C9H9O4)3.nH2O where Ln = La(III), Ce(III), Pr(III), Nd(III), Sm(III), Eu(III), Gd(IIII), and n = 3 for La(III), Gd(III), n = 2 for Sm(III), Eu(III), and n = 0 for Ce(III), Pr(III), Nd(III) have been synthesized and characterized by elemental analysis, IR spectroscopy, thermogravimetric studies and X-ray diffraction measurements. The complexes have colours typical for Ln 3+ ions (La, Ce, Eu, Gd-white, Sm-cream, Pr-green, Nd-violet). The carboxylate group in these complexes is a symmetrical, bidentate, chelating
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Kawada, Jumpei, Yasuo Abe, Toshifumi Yui, Kenji Okuyama, and Kozo Ogawa. "Crystalline Transformation of Chitosan from Hydrated to Anhydrous Polymorph Via Chitosan Monocarboxylic Acid Salts." Journal of Carbohydrate Chemistry 18, no. 5 (1999): 559–71. http://dx.doi.org/10.1080/07328309908544019.

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Dissertations / Theses on the topic "Hydrated and anhydrous salts"

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Scott, Catherine Anne. "A chemico-physical study of anhydrous and hydrated hydraulic limes." Thesis, Keele University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.522663.

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Recently, there has been renewed interest in the use of hydraulic lime mortars. They are attractive not only to the modern architect, but also have extensive use in the restoration and protection of historic architecture. This has led to a demand for an increasing quantity of research into these materials as much current knowledge is drawn from anecdotal accounts rather than validated scientific research. In this thesis the link between the mineralogy and physico-chemical properties of a series of hydraulic limes was investigated; the series being chosen to represent the various commercial gra
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Koike, Gilberto Hirotsugu Azevedo. "Análise, desenvolvimento e ensaio de um dispositivo experimental para fornecer álcool etílico hidratado como segundo combustível para motores do ciclo diesel." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/18/18135/tde-12022016-162221/.

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Um grande problema atual do mundo é o efeito estufa causado pela combustão de petróleo e seus derivados. Além disso, as reservas de petróleo não são ilimitadas, nem renováveis. Uma maneira de minimizar o problema é a utilização de combustíveis renováveis, tais como o etanol, derivado da cana de açúcar. É o caso dos motores de ignição por centelha que usam o etanol há décadas no Brasil. Este trabalho descreve as tecnologias existentes para utilização de etanol em motores de ignição por compressão. Apresenta resultados energéticos e de consumo de mistura de etanol anidro com diesel em diversas p
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Chiu, Yu-Hsiu, and 邱鈺琇. "Thermal Properties and Structural Characterizations of New Types of Phase Change Material: Anhydrous and Hydrated Palmitic Acid/Camphene Solid Dispersions." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/9k3f6k.

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碩士<br>國立中央大學<br>化學工程與材料工程學系<br>101<br>Our aim is to find phase change material (PCM) mixtures which also have an increase in the heat capacity in solid or liquid state. Increasing heat capacity in liquid or solid state would enhance the part of heat storage which can be used in a wider temperature range, rather than just to absorb or release heat energy near the melting point or freezing point. We use low-temperature differential scanning calorimetry (LT-DSC) to determine the melting point and the equilibrium state, powder X-ray diffraction (PXRD) and small-angle X-ray scattering (SAXS) to d
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Tkachev, Sergey Nikolayevech. "Compressibility of hydrated and anhydrous sodium silicate-based liquids and glasses, as analogues for natural silicate melts, by brillouin scattering sepctroscopy." Thesis, 2005. http://hdl.handle.net/10125/11640.

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Mode of access: World Wide Web.<br>Thesis (Ph. D.)--University of Hawaii at Manoa, 2005.<br>Includes bibliographical references (leaves 94-111).<br>Electronic reproduction.<br>Also available by subscription via World Wide Web<br>xv, 111 leaves, bound ill. (some col.) 29 cm
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Book chapters on the topic "Hydrated and anhydrous salts"

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Sibie, Shereen K., Mohamed F. El-Amin, and Shuyu Sun. "Modeling and Simulation of Atmospheric Water Generation Unit Using Anhydrous Salts." In Computational Science – ICCS 2021. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-77980-1_22.

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Farid, Mohammed, and Ali Nasser Khalaf. "Performance of Direct Contact Latent Heat Storage Units with Two Hydrated Salts." In Thermal Energy Storage with Phase Change Materials. CRC Press, 2021. http://dx.doi.org/10.1201/9780367567699-11.

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Anderson, Susan N., Fred Basolo, and E. I. Onstott. "Hydrated Rhodium(III) Chloride, Chloroamminerhodium (III) Salts, and a Note on the Recovery of Rhodium Wastes." In Inorganic Syntheses. John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470132388.ch57.

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Skibsted, Jørgen, and Hans J. Jakobsen. "Characterization of the Calcium Silicate and Aluminate Phases in Anhydrous and Hydrated Portland Cements by 27Al and 29Si MAS NMR Spectroscopy." In Nuclear Magnetic Resonance Spectroscopy of Cement-Based Materials. Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-642-80432-8_1.

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Gunawati, M. N. Nasruddin, Adi Setiawan, K. Sebayang, A. Makruf, and Zakaria. "Design and Calibration of Temperature Monitoring Device for a Cold Box with Hydrated Salts as Phase Change Material (PCM)." In Proceedings of the 2nd International Conference on Experimental and Computational Mechanics in Engineering. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0736-3_20.

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"Chapter 7 Thermal dehydration of hydrated salts." In Thermal Decomposition of Ionic Solids. Elsevier, 1999. http://dx.doi.org/10.1016/s0167-6881(99)80009-3.

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Tafu, Masamoto, and Takeshi Toshima. "Production of Dicalcium Phosphate with Controlled Morphology and Reactivity." In Additive Manufacturing in Biomedical Applications. ASM International, 2022. http://dx.doi.org/10.31399/asm.hb.v23a.a0006884.

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Abstract Calcium phosphates react to form more stable salts in aqueous solutions. This phenomenon has been applied to the solidification process for the dental and medical cement calcium phosphate cement, which consists of multiple phases of calcium phosphates and calcium salts; solidification occurs by the formation of hydroxyapatite. Dicalcium phosphate consists of crystal water along with anhydrous and dihydrate salts. This article summarizes research achievements regarding dicalcium phosphate dihydrate (DCPD) production with controlled morphology and reactivity, including effects of an add
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Lopes Rui Pedro, Marques M. Paula M., Valero R., Tomkinson John, and Batista de Carvalho Luís A.E. "Guanine &ndash; A combined study using vibrational spectroscopy and theoretical methods." In Advances in Biomedical Spectroscopy. IOS Press, 2013. https://doi.org/10.3233/978-1-61499-184-7-127.

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The present work reports a conformational study of solid-state anhydrous guanine, using vibrational spectroscopy techniques &amp;ndash; infrared, Raman and inelastic neutron scattering &amp;ndash; coupled to quantum mechanical methods at the DFT level, both for the isolated molecule and the condensed state. In both cases, the 7H-keto-amino tautomer was found to be the prevalent form, contrary to aqueous solutions and hydrated polycrystalline guanine, where the 9H-keto-amino tautomer is the most favoured species. This study is a significant contribution for the existing spectroscopic characteri
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Durchschlag, Helmut, and Peter Zipper. "Anhydrous and Hydrated Protein Models Derived from High-Resolution and Low-Resolution Techniques." In Protein Structure. InTech, 2012. http://dx.doi.org/10.5772/38450.

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Rieke, Reuben D., and mark v. Hanson. "Active zinc in organic synthesis." In Organozinc Reagents. Oxford University PressOxford, 1999. http://dx.doi.org/10.1093/oso/9780198501213.003.0007.

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Abstract In 1849, Frankland prepared diethylzinc from the reaction of zinc metal with ethyl iodide.1 Since then, organozinc reagents have proven to be useful tools in organic synthesis.2 The expansion of Frankland’s method was hampered by the lack of reactivity of bulk zinc metal in the preparation of organozinc reagents directly from organohalides. This limitation is due primarily to oxide coating of the zinc surface, and an inherently small surface area. These factors can be alleviated by forming the zinc metal in an anhydrous, aprotic solvent, under an inert atmosphere, by the chemical redu
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Conference papers on the topic "Hydrated and anhydrous salts"

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Moreira, Anna Ramus, Zehbour Panossian, Célia A. L. Santos, Gislaine M. Bragagnolo, Marcelo C. Gandur, and Emerson Monteiro de Souza. "Corrosivity of Anhydrous Ethanol, Hydrated Ethanol and Fuel E25 (25% Ethanol/75% Gasoline)." In CORROSION 2010. NACE International, 2010. https://doi.org/10.5006/c2010-10078.

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Abstract The objective of the work was to study the corrosion of API 5LX 46 and API 5LX 65 alloys, used for pipelines, in anhydrous ethanol, hydrated ethanol and fuel E25 through laboratory immersion tests, NACE TM-0172 tests and dynamic tests (corrosion loops). Based on the results of this study, it was concluded that it is advisable that the internal surface of hydrated ethanol storage tanks be painted in order to avoid the corrosion of the internal walls which, despite being incipient, determines color changes which is unacceptable in the market. Furthermore, in pipelines used only for etha
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Schutt, H. U., and R. J. Horvath. "Crude Column Overhead Corrosion Problems Caused by Oxidized Sulfur Species." In CORROSION 1987. NACE International, 1987. https://doi.org/10.5006/c1987-87198.

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Abstract Accelerated corrosion experienced in the overhead system of an atmospheric crude distillation column has been analyzed to determine the cause of the corrosion occurring at temperatures above the aqueous dew point. Results of field monitoring tests, laboratory tests and thermodynamic considerations all confirm that the corrosion is caused by deposition of hydrated ammonium bisulfate salts and/or condensation of sulfuric acid. This corrosion can be controlled by reducing the concentration of sulfur oxides in the system, by avoiding operating conditions conducive to formation of these co
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Coutinho, Diogo Azevedo, Marcelo Araújo, Mariana Machado Galvão, et al. "Diversity of Microorganisms Related to Biocorrosion in Ethanol Samples." In CORROSION 2013. NACE International, 2013. https://doi.org/10.5006/c2013-02681.

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Abstract Ethanol is the most common alcohol and a renewable energy source that can be produced from biomass. Brazil and the United States are world leaders in ethanol production, using as raw material sugar cane and corn, respectively. In Brazil, ethanol is used as automotive fuel in two forms: hydrated, used in ethanol-using cars and flex fuel cars; or anhydrous alcohol, which is added to gasoline. Ethanol is capable of being metabolized by various microorganisms serving as a carbon source for them. Under favorable conditions, bacteria and fungi can form biofilms and participate actively in t
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Das, Gaurav, Ronald D. Springer, Jerzy Kosinski, and Andre Anderko. "Induction Time Modeling for Common Scaling Minerals in the Absence and Presence of Inhibitors Using a Novel Theoretical Framework." In CONFERENCE 2023. AMPP, 2023. https://doi.org/10.5006/c2023-18805.

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Abstract Mineral scaling in the oil and gas industry poses a significant challenge for flow assurance due to changes in process conditions, such as pressure and temperature changes, dissolved gases, or incompatibility between waters that are mixed in waterflooding process and chemical treatment operations. This study focuses on understanding the scaling threat of common mineral scales (barite, celestine, gypsum, calcite) and on the effectiveness of phosphonate inhibitors at various solution conditions including the concentrations of background electrolytes and temperature. We propose a novel m
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Balasubramanian, Ganesh, Mehdi Ghommem, Muhammad R. Hajj, William P. Wong, Jennifer A. Tomlin, and Ishwar K. Puri. "Thermochemical Energy Storage Using Salt Hydrates." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-39779.

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We investigate the capability of salt hydrates, using magnesium sulfate heptahydrate as a model salt, to store thermo-chemical energy as they dissociate into anhydrous salts or lower hydrates and water vapor upon heating. When salt hydrates are heated to the temperature required to activate the dehydration reaction, water desorption occurs from the compound. While thermal diffusion governs thermal transport below this reaction temperature, the heat transfer during the dehydration process is influenced by thermochemical kinetics. An anhydrous salt that has relatively higher energy content than
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Chevreux, P., S. Serp, and M. Duchateau. "Synthesis of actinide chlorides for molten salt preparation." In 12th International Conference of Molten Slags, Fluxes and Salts (MOLTEN 2024) Proceedings. Australasian Institute of Mining and Metallurgy (AusIMM), 2024. http://dx.doi.org/10.62053/icca8834.

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Molten salt reactor (MSR) is a promising advanced reactor system aiming to the transmutation of minor actinides such as americium in order to reduce the inventory of ultimate nuclear waste. The fuel is a molten salt in which actinides are homogeneously dissolved in the liquid phase. A chloride salt may be retained for this concept, as it provides low melting point, high solubility of actinides, harder neutron spectrum. To avoid corrosion and precipitation issues, molten salt composition has to be carefully controlled with impurity content as low as possible. Obtaining pure actinide chlorides w
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Sokolnikov, Andre. "THz characterization of hydrated and anhydrous materials." In SPIE Defense, Security, and Sensing. SPIE, 2011. http://dx.doi.org/10.1117/12.885646.

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Thomas, K. L., L. P. Keller, G. E. Blanford, and D. S. McKay. "Quantitative analyses of carbon in anhydrous and hydrated interplanetary dust particles." In Analysis of interplanetary dust: NASA/LPI workshop. AIP, 1994. http://dx.doi.org/10.1063/1.46532.

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Vasanthkumar, P., A. Santhoshkumar, P. Gopika, M. Murali, and C. Meera. "Analyses of Cold Thermal Energy Storage Systems Using Eutectic Mixtures of Inorganic Hydrated Salts as Phase Change Materials." In Automotive Technical Papers. SAE International, 2025. https://doi.org/10.4271/2025-01-5003.

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&lt;div class="section abstract"&gt;&lt;div class="htmlview paragraph"&gt;Cold thermal energy storage using phase changing materials is being researched to find freezing and thawing points. The use of inorganic hydrated salts, a type of phase changing material (PCM) used in cold energy storage systems without the use of existing renewable energy systems, allows for a longer cooling effect and saves energy. A high volumetric storage density and relatively high thermal conductivity make hydrated salts suitable materials for thermal energy storage. They can be used only as inorganic mixtures or e
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Pavlikova, Milena, and Zbysek Pavlik. "SALTS ACCUMULATION EFFECT ON DURABILITY OF NON-HYDROPHOBISED RENOVATION PLASTERS." In 23rd SGEM International Multidisciplinary Scientific GeoConference 2023. STEF92 Technology, 2023. http://dx.doi.org/10.5593/sgem2023/6.1/s26.40.

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This paper focuses on the experimental testing of hydrated lime-, natural hydraulic lime-, and lime-cement-based mortars with improved salt accumulation capacity. Moreover, the effect of varying content of non-hydrophobised expanded perlite (EP) in the mortars on their durability was investigated. The substation of silica sand by expanded perlite was 25%, 50%, 75% and 100% by volume. A modified method based on the adsorption of free salt ions from solution was used to measure the chloride binding isotherms. The salt concentration was analyzed using an apparatus working on liquid chromatography
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Reports on the topic "Hydrated and anhydrous salts"

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Haiges, Ralf, and Karl O. Christe. A New Synthesis of Anhydrous Cesium Salts. Defense Technical Information Center, 2001. http://dx.doi.org/10.21236/ada408096.

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