Relevant bibliographies by topics / Counter-ion exchange

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  2. Dissertations / Theses
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  4. Book chapters
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Academic literature on the topic 'Counter-ion exchange'

Author: Grafiati
Published: 4 June 2021
Last updated: 12 February 2022

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Journal articles on the topic "Counter-ion exchange"

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Murayama, Y., and M. Sano. "Collapsing Transition of DNA and Counter Ion Exchange." Seibutsu Butsuri 43, supplement (2003): S28. http://dx.doi.org/10.2142/biophys.43.s28_4.

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Coryn, G., A. Speecke, and J. Hoste. "An Electronic Drop Counter for Ion Exchange Chromatography." Bulletin des Sociétés Chimiques Belges 66, no. 1 (September 1, 2010): 650–53. http://dx.doi.org/10.1002/bscb.19570660154.

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Luo, Tao, Florian Roghmans, and Matthias Wessling. "Ion mobility and partition determine the counter-ion selectivity of ion exchange membranes." Journal of Membrane Science 597 (March 2020): 117645. http://dx.doi.org/10.1016/j.memsci.2019.117645.

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Srikanth, M. V., S. A. Sunil, N. S. Rao, M. U. Uhumwangho, and K. V. Ramana Murthy. "Ion-Exchange Resins as Controlled Drug Delivery Carriers." Journal of Scientific Research 2, no. 3 (August 24, 2010): 597. http://dx.doi.org/10.3329/jsr.v2i3.4991.

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Ion exchange resins (IER) are insoluble polymers that contain acidic or basic functional groups and have the ability to exchange counter-ions within aqueous solutions surrounding them. Based on the nature of the exchangeable ion of the resin as a cation or anion, it is classified as cationic or anionic exchange resins, respectively. The efficacy of ion exchange resins mainly depends upon their physical properties such as degree of cross-linking, porosity, acid base strength, stability, purity and particle size. Modified release of drugs from resinate (drug-resin complexes) is another potential application of ion exchange resins. Due to the versatile utility of ion exchange resins, they are being used for various drug delivery and therapeutic applications. Resins used are polymers that contain appropriately substituted acidic groups, such as carboxylic and sulfonic for cation exchangers; or basic groups, such as quaternary ammonium group for anion exchangers. This review addresses different types of ion exchange resin, their properties, the chemistry; role of IER in controlled drug delivery systems, its therapeutic applications, methods of preparation of IER along with their resonates. Keywords: Anion exchange; Cation exchange; Resin; Controlled release; Resinates; Drug delivery. © 2010 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved. DOI: 10.3329/jsr.v2i3.4991 J. Sci. Res. 2 (3), 599-613 (2010)
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Zerdoumi, Ridha, Kafia Oulmi, and Salah Benslimane. "Enhancement of counter-ion transport through ion-exchange membranes in electrodialytic processes." Desalination and Water Treatment 56, no. 10 (October 17, 2014): 2631–36. http://dx.doi.org/10.1080/19443994.2014.972734.

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Rubinstein, Isaak. "Theory of concentration polarization effects in electrodialysis on counter-ion selectivity of ion-exchange membranes with differing counter-ion distribution coefficients." Journal of the Chemical Society, Faraday Transactions 86, no. 10 (1990): 1857. http://dx.doi.org/10.1039/ft9908601857.

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Kimizuka, Hideo, Hirohiko Waki, Akira Matsubara, and Y\={o}ichi Arimoto. "Additivity Law for the Activity of a Counter Ion in Ion-Exchange Resin." Bulletin of the Chemical Society of Japan 60, no. 5 (May 1987): 1613–15. http://dx.doi.org/10.1246/bcsj.60.1613.

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Gan, L. "Micellar Effects on the Formation of the 1,3,5-Trinitrobenzene-Cyanide Complex in Water." Australian Journal of Chemistry 38, no. 8 (1985): 1141. http://dx.doi.org/10.1071/ch9851141.

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The anionic σ-complex from cyanide ion and 1,3,5-trinitrobenzene in water was stabilized by cationic micelles. The binding of counter ions to the micellar head groups in hexadecyl-trimethylammonium cyanidefollowed a distribution model with the counter ion binding constant KCN = 1400 mol-1 dm3. The bromide-cyanide ion exchange constant, KCNBr, was equal to 1.28. These results rendered further support to the general applicability of the distribution model.
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Prajapati, M. N., P. M. Gaur, and B. D. Dasare. "Brackish water desalination by a continuous counter-current ion-exchange technique." Desalination 52, no. 3 (January 1985): 317–26. http://dx.doi.org/10.1016/0011-9164(85)80041-2.

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Nikolaev, N. P., V. A. Ivanov, V. I. Gorshkov, V. A. Nikashina, and N. B. Ferapontov. "Counter-current ion-exchange separation of strontium from brines with acrylic-type cation-exchange resins." Reactive Polymers 18, no. 1 (August 1992): 25–33. http://dx.doi.org/10.1016/0923-1137(92)90291-9.

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Dissertations / Theses on the topic "Counter-ion exchange"

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Ouahid, Soumia. "Transport facilité du glucose à travers une membrane échangeuse d'anions avec l'ion borate comme transporteur." Rouen, 1994. http://www.theses.fr/1994ROUES029.

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Par couplage diffusion-réaction, le transport d'un substrat non ionique à travers une membrane échangeuse d'ions, peut être facilité en choisissant un contre-ion apte à réagir réversiblement avec le substrat. Dans ce travail, nous avons réalisé le transport facilité à travers une membrane échangeuse d'anions. L'ion borate était utilisé comme transporteur et sa teneur dans la membrane était fixée par l'activité de l'acide borique. Nous avons mené simultanément la modélisation et l'expérimentation du transport. Par des études d'équilibre et de conductivité, nous avons déterminé les paramètres physicochimiques, tels que le coefficient de stabilité du complexe glucose-borate et le coefficient de diffusion des différentes espèces présentes. Nous avons, de plus, mis en évidence en présence de glucose, deux aspects originaux: la variation de l'accessibilité des sites membranaires et la variation de leurs interactions avec certains contre-ions. Dans la majorité des cas, nous avons choisi une activité d'acide borique relativement faible afin que les polyborates soient minoritaires devant les autres contre-ions. Dans une première série de mesures, nous avons réalisé le transport facilité du glucose en fonction de son activité, en maintenant constante celle de l'acide borique. Dans une seconde série, le transport a été réalisé en fonction de l'activité du transporteur. A partir des paramètres préalablement déterminés, nous avons élaboré un modèle théorique qui permet de comparer les valeurs théoriques et expérimentales des flux du glucose. Nous parvenons à un bon accord lorsque le transport a été réalisé en imposant pour l'acide borique une activité pour laquelle les paramètres du modèle ont été caractérisés
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Tamoto, Rumi. "Nano/micro auto-assemblages chiraux de tensioactifs cationiques : du comportement dynamique des architectures supramoléculaires jusqu’aux nanomatériaux hybrides." Thesis, Bordeaux 1, 2011. http://www.theses.fr/2011BOR14464/document.

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Nous avons étudié les comportements dynamiques d'auto-assemblage des tensioactifs cationiques non-chiral en présence du contre-anion chiral.Lorsque le nucléotide anionique chiral est ajouté à des vésicules cationiques, la transition morphologique se produit et transforme in situ des vésicules sphériques en hélices micrométriques.D'autres types de Gemini tensioactifs cationiques forment des rubans nanométriques hélicoïdaux, en présence de tartrate contre-anions. La forme et l'hélicité de ces rubans peuvent être contrôlés in situ par la variation de l'excès énantiomérique.En outre, les nanohélices organiques peuvent être transcrite en nanohélices 3D de silice via une polycondensation sol-gel.Ces nanohélices de silice fonctionnalisées avec des groupes aminés peuvent interagir fortement avec des nanoparticules d'or (GNPs; 1 ~ 20 nm). Le réseau 3D de -nanohélices GNPs/silice sont potentiellement utilisables pour des applications de capteurs basée sur les SERS comme ceux chimiques et biologiques ultra-sensibles en phase liquide
We have studied the dynamic self-assembly behaviors of non-chiral cationic surfactants in thepresence of chiral counter-anion.When the chiral anionic nucleotides are added to cationic vesicles, morphology transitionoccurs and spherical vesicles transform in situ to micrometric helices.Other types of cationic surfactant, gemini surfactants form nanometric helical ribbons in thepresence of tartrate counter-anion. The shape and helicity of these self-assembled structurescan be controlled in situ by the variation of enantiomeric excess.In both cases, they form gels in water by creating extended networks of nanometric tomicrometric chiral fibers.Additionally, the organic nanohelices can be transcribed to 3D silica nanostructures via solgelpolycondensation. These silica nanohelices functionalized with amino group can interactstrongly with gold nanoparticles (1 ~ 20 nm). The 3D network of GNPs/silica-nanohelices canpotentially be used for SERS-based sensing applications such as ultra-sensitive chemical andbiological sensors in liquid phase
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Books on the topic "Counter-ion exchange"

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Meer, Andries Piet van der. On counter-current fluidized ion-exchange columns. [Delft?: S. n., 1985.

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Book chapters on the topic "Counter-ion exchange"

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Wesselingh, J. A., and A. P. Meer. "Counter-Current Ion Exchange." In Ion Exchange: Science and Technology, 289–318. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4376-6_11.

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Senior, J. P. "Ion Chromatography and Pharmaceutical Research - A Study of Counter-Ions." In Recent Developments in Ion Exchange, 60–66. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3449-8_7.

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Nikolaev, N. P., V. A. Ivanov, and V. I. Gorshkov. "MULTICOMPONENT COUNTER-CURRENT ION-EXCHANGE CHROMATOGRAPHY." In Progress in Ion Exchange, 486–94. Elsevier, 1997. http://dx.doi.org/10.1533/9781845698652.5.486.

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"Methods of solving the ion exchange inverse problem in counter-current columns." In Ill-Posed Problems in Natural Sciences, 482–86. De Gruyter, 1992. http://dx.doi.org/10.1515/9783112313930-055.

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Harrison, Roger G., Paul W. Todd, Scott R. Rudge, and Demetri P. Petrides. "Liquid Chromatography and Adsorption." In Bioseparations Science and Engineering. Oxford University Press, 2015. http://dx.doi.org/10.1093/oso/9780195391817.003.0010.

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Liquid chromatography and adsorption processes are based on the differential affinity of various soluble molecules for specific types of solids. In these processes, equilibrium is approached between a solid phase, often called the resin, or stationary phase, and the soluble molecules in a liquid phase. The solid phase is “stationary” because it is often packed in a fixed column. Since the liquid phase is often flowing past the solid phase, it is referred to as the mobile phase. Chromatography and adsorption are related unit operations. In chromatography, typically multiple solutes are separated from each other, with the target product solute being one of many that might be recovered at the end of the process step. In adsorption, there are typically only three groups of solutes: those that do not adsorb to the stationary phase (sometimes called “flow through”); secondly, those that adsorb and then are subsequently recovered by an elution step; and thirdly, those solutes that are nearly irreversibly bound and can only be removed from the adsor­bent by regenerating the adsorbent, which usually results in the chemical destruction of these solutes. The word “adsorption” is used both to describe the physical adherence of a solute to a stationary phase, and as the name of the unit operation described above. Adsorption is a subset of the “sorption” phenomena, absorption (transfer of a solute from one phase into another) and ion exchange (exchange of a counter-ion between two opposing co-ions) being the other two sorption phenomena. The unit operations chromatography and adsorption can rely on any of these three sorption processes individually or in combination. In chromatography and adsorption, a mixture of solutes in a feed solution is introduced at the inlet of a column containing the stationary phase and separated into zones of individual solutes over the length of the column. The solutes are carried by the convective action of an elution solvent that is continuously fed to the column after the feed solution has been introduced.
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Adachi, S., and R. Matsuno. "Effects of swelling pressure of resin and complex formation with a counter-ion on the apparent distribution coefficient of a saccharide onto a cation-exchange resin." In Progress in Biotechnology, 87–92. Elsevier, 2000. http://dx.doi.org/10.1016/s0921-0423(00)80018-0.

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Conference papers on the topic "Counter-ion exchange"

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Drescher, Adam, Brandon De Luna, Marjolein Pasman, Derek Haas, and Sheldon Landsberger. "Revamping of a Graduate Radiochemistry Course for Nuclear Forensics Applications." In 2018 26th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/icone26-81593.

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Laboratories in traditional radiochemistry courses typically involve basic and fundamental understanding in solvent extraction, ion exchange, precipitation, etc. procedures. With the increased focus on nuclear forensics in pre- and post-detonation scenarios different skill sets are now required for the student to learn. At the University of Texas we have developed two independent graduate courses in gamma-ray spectrometry and radiochemistry. Currently, we have amalgamated these two courses to 1. better serve our nuclear engineering graduate students, many of which are involved in nuclear forensics and 2. to attract both undergraduate and graduate students from the Chemistry Department. We incorporated gamma-ray spectrometry laboratories with several others which are nuclear forensics related. The seven laboratory sessions include half-life measurement of 137mBa (the daughter produce of 137Cs) and secular equilibrium, basic gamma and beta shielding, and gamma-ray spectrometry calibration, resolution and uncertainty in statistics. These labs have been augmented with four others including uranium fission product identification, 137Cs soil profile with Compton suppression, tritium analysis in water with a liquid scintillation counter and double replacement reaction.
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Mimura, Hitoshi, Minoru Matsukura, Tomoya Kitagawa, Fumio Kurosaki, Akira Kirishima, Daisuke Akiyama, and Nobuaki Sato. "Evaluation of Adsorption Properties of U(VI) for Various Inorganic Adsorbents." In 2018 26th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/icone26-81338.

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Large amounts of highly contaminated water over 800,000 m3 accumulated in the reactor, turbine building and the trench in the facility were generated from the nuclear accident of Fukushima NPS (BWR) caused by the Great East Japan Earthquake. At present, the cold shutdown is completed stably by the circulating injection cooling system (SARRY, KURION) for the decontamination of radioactive nuclides such as 134Cs and 137Cs using zeolites and crystalline silicotitanate (CST). Further, the Advanced Liquid Processing System (ALPS) is under operation for the decontamination of 62 nuclides such as 90Sr, 129I and 60Co, etc. However, the adsorption behaviors of actinoids through the decontamination systems are complicated, and especially their adsorption properties for zeolites and CST, major inorganic adsorbents, are not yet clarified. In near future, the decontamination of actinoids leached from the crushed fuel debris will be an important subject. In this study, the practical adsorption properties of U(VI) for various inorganic adsorbents were evaluated under different solution conditions. The adsorption properties (distribution behaviors and adsorption kinetics) were evaluated by batch adsorption method; 19 kinds of inorganic adsorbents including zeolites and CST (crystalline silicotitanate) were contacted with U(VI)) solutions. The conditions of 5 kinds of U(VI) solutions were as follows; Solution 1: [U(VI)] = 50 ppm, initial pH = 0.5 ∼ 5.5 Solution 2: [U(VI)] = 50 ppm, [NaCl] = 0.1 M, initial pH = 4.0 Solution 3: [U(VI)] = 50 ppm, [CaCl2] = 0.1 M, initial pH = 4.0 Solution 4: [U(VI)] = 4.84 mM, [NaCl] = 0.1 M, initial pH = 3.18 Solution 5: [U(VI)] = 4.86 mM, 2,994 ppm boric acid/30% seawater, initial pH = 4.25 The uptake (%) and distribution coefficient (Kd. cm3/g) were estimated by counting the radioactivity using NaI(Tl) scintillation counter and liquid scintillation counter. In the simple Solution 1, the Kd values for zeolites increased linearly with equilibrium pH up to pH 7. The Kd value for tin hydroxide had a maximum profile around pH 7 and a relatively large Kd value above 104 cm3/g was obtained. In the presence of NaCl and CaCl2 (Solution 2 and 3), relatively large Kd values above 102 cm3/g were obtained, other than mordenite and clinoptilolite, and the effect of [Ca2+] on U(VI) uptake was larger than that of [Na+]. In Solution 4 containing high concentration of U(VI), the uptake(%) was considerably lowered, while that for zeolite A, X and Y was estimated over 20%. Similar tendency was observed in Solution 5, and, in the case of granulated potassium titanate, yellow precipitate was observed on the surface due to the increase of equilibrium pH up to 5.25. The adsorption behavior of U(VI) on inorganic adsorbents is mainly governed by three steps; ion exchange, surface precipitation of hydrolysis species and sedimentation depending on equilibrium pH, and hence it should be noted the change of U(VI) chemical species. These basic adsorption data are useful for the selection of inorganic adsorbents in the Fukushima NPS decontamination process.
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Wilhelm, S., and A. Henschen. "ON THE IDENTIFICATION OF POLYMORPHIC SITES IN HUMAN FIBRINOGEN PEPTIDE CHAINS." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643327.

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Human fibrinogen has repeatedly been shown to occur in a great number of different molecular forms. Some types of heterogeneity are evident already from variations in solubility properties and in ion-exchange-chromatographic as well as gel-electrophoretic behaviour of the total molecule and of its peptide chain components. The reason for these variations are partly known.Thus, degradation of the C-terminal parts and phosphorylation of two serine residues gives rise to heterogeneity in the Aα-chain. Differences in the sialylation of the carbohydrate side chain causes heterogeneity both in the Bβ- and the γ-chain. Differences in chain length at the C-terminus of the γ-chain are responsible for additional variation. All these variants are expected to exist in each human being. An other category of human fibrinogen variants may be due to genetic polymorphism within the population, i.e. the presence of inherited, common, normal variants. Seven sites of microheterogeneity have so far been tentatively identified, mainly by disagreements between protein and DNA sequence analyses. Three of the sites are located in the Aα-chain (positions 47, 296 and 312), three in the Bβ-chain (positions 162, 296 and 44-8) and one in the γ-chain (position 88). The aim of the present study was to identify these sites on the proteinchemical level in pooled plasma as well as in plasma from single individuals, especially various members of the same family. For this purpose suitable fibrinogen fragments containing the tentatively microheterogeneous sites were isolated after cleavage of fibrinogen with cyanogen bromide, trypsin and/or chymotrypsin by repeated fractionations by means of conventional and reversed-phase high-performance liquid chromatography and counter-current distribution. The components were characterized by N-terminal sequence and amino acid composition. Polymorphism in human fibrinogen has previously only once been identified by restriction fragment length analysis in a non-transcribed region of the Aα-chain locus but never in the transcribed regions, i.e. the peptide chains.The present investigation will allow the estimation of the number of peptide chain haplotypes and their possible correlation to other genetic variants of fibrinogen.
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Ågren, Niklas D., Mats O. Westermark, Michael A. Bartlett, and Torbjörn Lindquist. "First Experiments on an Evaporative Gas Turbine Pilot Power Plant: Water Circuit Chemistry and Humidification Evaluation." In ASME Turbo Expo 2000: Power for Land, Sea, and Air. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/2000-gt-0168.

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The evaporative gas turbine (EvGT), also known as the humid air turbine (HAT) cycle, is a novel advanced gas turbine cycle that has attracted considerable interest for the last decade. This high efficiency cycle shows the potential to be competitive with Diesel engines or combined cycles in small and intermediate scale plants for power production — and/or cogeneration. A 0.6 MW natural gas fired EvGT pilot plant has been constructed by a Swedish national research group in cooperation between universities and industry. The plant is located at the Lund Institute of Technology, Lund, Sweden. The pilot plant uses a humidification tower with metallic packing in which heated water from the flue gas economizer is brought into direct counter current contact with the pressurized air from the compressor. This gives an efficient heat recovery and thereby a thermodynamically sound cycle. As the hot sections in high temperature gas turbines are sensitive to particles and alkali compounds, water quality issues need to be carefully considered. As such, apart from evaluating the thermodynamic and part load performance characteristics of the plant, and verifying the operation of the high pressure humidifier, much attention is focused on the water chemistry issues associated with the recovery and reuse of condensate water from the flue gas. A water treatment system has been designed and integrated into the pilot plant. This paper presents the first water quality results from the plant. The experimental results show that the condensate contains low levels of alkali and calcium, around 2 mg/l Σ(K,Na,Ca), probably originating from the unfiltered compressor intake. About 14 mg/l NO2− + NO3− comes from condensate absorption of flue gas NOx. Some Cu is noted, 16 mg/l, which originates from copper corrosion of the condenser tubes. After CO2-stripping, condensate filtration and a mixed bed ion exchanger, the condensate is of suitable quality for reuse as humidification water. The need for large quantities of demineralized water has by many authors been identified as a drawback for the evaporative cycle. However, by cooling the humid flue gas, the recovery of condensed water cuts the need of water feed. A self supporting water circuit can be achieved, with no need for any net addition of water to the system. In the pilot plant, this was achieved by cooling the flue gas to around 35°C.
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Reports on the topic "Counter-ion exchange"

1

Wester, Dennis W., Robert K. Leugemors, and Paul W. Taylor. Pilot-Scale Test of Counter-Current Ion Exchange (CCIX) Using UOP IONSIV IE-911. Office of Scientific and Technical Information (OSTI), September 2001. http://dx.doi.org/10.2172/786812.

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Wester, Dennis W., Fernando Fondeur, Richard Dennis, Jeff Pike, Robert K. Leugemors, Paul W. Taylor, and Thong Hang. Pilot-Scale Test of Counter-Current Ion Exchange (CCIX) Using UOP IONSIV IE-911. Office of Scientific and Technical Information (OSTI), September 2001. http://dx.doi.org/10.2172/15001146.

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