Gotowe bibliografie tematyczne / Theory of mixed solvent

Gotowa bibliografia na temat „Theory of mixed solvent”

Autor: Grafiati
Data publikacji: 18 maja 2024

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Artykuły w czasopismach na temat "Theory of mixed solvent"

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Wang, Jianji, Yang Zhao, Kelei Zhuo i Ruisen Lin. "Viscosity Properties of Electrolytes in Propylene Carbonate Based Lithium Battery Electrolyte Solutions". Zeitschrift für Physikalische Chemie 217, nr 6 (1.06.2003): 637–52. http://dx.doi.org/10.1524/zpch.217.6.637.20445.

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AbstractViscosities of LiClO4 and LiBr have been measured in solvent mixtures of propylene carbonate (PC) with dimethylformamide (DMF), tetrahydrofuran (THF), acetonitrile (AN) and methyl formate (MF) at 298.15K. The dependence of viscosity on the composition of the mixed solvents was fitted with an equation without adjustable parameter. Viscosity B-coefficients for lithium salts and the corresponding activation free energies (Δμ0,≠) for viscous flow have been evaluated. At the same time, viscosity B-coefficients were predicted by the dielectric friction theory. The unsuccessful prediction of the composition dependence of the B-coefficients indicates that improvements will be necessary on the theory with taking account of the short-range interaction and molecular nature of the solvents. Furthermore, solute–solvent interactions in these mixed solvents are discussed in terms of the B-coefficients and activation parameters.
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Tyunina, E. Yu, i M. D. Chekunova. "LiAsF6 SOLUTIONS IN THE MIXED SOLVENTS OF PROPYLENE CARBONATE – DIMETHYL SULFOXIDE: ELECTRIC CONDUCTIVITY AND ELECTROCHEMICAL STABILITY". Электрохимия 59, nr 12 (1.12.2023): 872–83. http://dx.doi.org/10.31857/s0424857023120137.

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The specific conductivities of LiAsF6 solutions in a mixed solvent of propylene carbonate (PC) –dimethyl sulfoxide (DMSO) were measured at temperatures of 253.15, 263.15, 273.15, 283.15, 293.15, 303.15, 313.15, 323.15 and 333.15 K being a ionophore concentration of 0.2 to 1.4 mol / kg. The portion of DMSO in the mixed solvent was varied in the range of (0.2 - 0.75) mole fractions. The specific conductivities of LiAsF6 in DMSO were studied in the temperature range of (293.15 – 333.15) K. Concentration dependences of specific conductivity of the system can be described by the Casteel-Amis equation. The contributions of the solvent and ionophore to the activation energy of the ionic conduction process are determined on the base of the transition state theory. It has been found that the LiAsF6 solutions in a mixed PC – DMSO solvent have a narrower electrochemical window compared to the solutions of this ionophore in pure PC and DMSO solvents.
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Xiao, Rui, Jin Qian i Shaoxing Qu. "Modeling Gel Swelling in Binary Solvents: A Thermodynamic Approach to Explaining Cosolvency and Cononsolvency Effects". International Journal of Applied Mechanics 11, nr 05 (czerwiec 2019): 1950050. http://dx.doi.org/10.1142/s1758825119500509.

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If gel swells in binary solvents, two unusual phenomena may appear. Two solvents with relatively low swelling ability may become a good solvent for the polymer with high swelling ability when mixed, which is known as a cosolvency effect. In contrast, a cononsolvency effect indicates polymer is less soluable in solvent mixtures than it is in each of the cosolvents. In this work, we develop a thermodynamic theory to describe the equilibrium swelling behaviors of gels in binary solvents based on the Flory–Huggins lattice model. The model can reproduce both cosolvency and cononsolvency effects, showing that these effects are caused by the preferential absorption of the solvent by polymer together with solvent–solvent interactions. The model is also applied to describe experimentally observed cosolvency and cononsolvency effects in the literature, which shows an acceptable agreement.
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Anderson, Lester, Evan Yu i Wan-Ting Chen. "Chemical Recycling of Mixed Plastics in Electronic Waste Using Solvent-Based Processing". Processes 10, nr 1 (29.12.2021): 66. http://dx.doi.org/10.3390/pr10010066.

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Currently, less than 20% of electronic waste (E-waste) produced in the U.S. is recycled. To improve the recycling rate of E-waste, the study aimed to: (1) identify the major plastics found within electronic shredder residue (ESR), (2) design solvents and processing conditions capable of separating out 90% of the plastic in ESR, and (3) estimate the energy efficiency of the solvent-based process developed. Preliminary screening showed 25 wt.% of the ESR was composed of plastics, with two polymers dominating the sorted plastic fraction—polystyrene (PS, 40 wt.%) and acrylonitrile butadiene styrene (ABS, 25 wt.%). Subsequently, solvents and anti-solvents were screened using Hansen Solubility Parameter Theory for PS, ABS, and ESR dissolution. The pre-screening results showed dichloromethane (DCM) and tetrahydrofuran (THF) as the most effective solvents for PS and ABS, with methanol (MeOH) and ethylene glycol (EG) as the most effective anti-solvents. By optimizing the dissolution time and the solvents used, the highest polymer dissolution yield (99 wt.%) was achieved using DCM for 48 h. Both MeOH and EG precipitated 71 wt.% of the polymer fraction of ESR. EG removed more phosphorus containing flame retardants (94 wt.%) than MeOH (69 wt.%). Energy analysis indicated that the solvent-based processes could save 25–60% of the embodied energy for PS and ABS. Characterization showed that the solvent-based processing could preserve the high molecular weight fraction of the polymers while removing flame retardants at the same time. The results from this study prove the potential of solvent-based processing to produce secondary plastic materials from E-waste for cross-industry reuse.
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RASIDGAZI, HARUN AL, HEMANT K. KASHYAP i RANJIT BISWAS. "Solvent sorting in (mixed solvent + electrolyte) systems: Time-resolved fluorescence measurements and theory". Journal of Chemical Sciences 127, nr 1 (styczeń 2015): 61–70. http://dx.doi.org/10.1007/s12039-014-0750-5.

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van Leuken, Stijn H. M., Rolf A. T. M. van Benthem, Remco Tuinier i Mark Vis. "Theoretically predicting the solubility of polydisperse polymers using Flory–Huggins theory". Journal of Physics: Materials 7, nr 1 (16.11.2023): 015005. http://dx.doi.org/10.1088/2515-7639/ad08d1.

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Abstract Polydispersity affects physical properties of polymeric materials, such as solubility in solvents. Most biobased, synthetic, recycled, mixed, copolymerized, and self-assembled polymers vary in size and chemical structure. Using solvent fractionation, this variety in molecular features can be reduced and a selection of the sizes and molecular features of the polymers can be made. The significant chemical and physical dispersity of these polymers, however, complicates theoretical solubility predictions. A theoretical description of the fractionation process can guide experiments and material design. During solvent fractioning of polymers, a part of the polydisperse distribution of the polymers dissolves. To describe this process, this paper presents a theoretical tool using Flory–Huggins theory combined with molecular mass distributions and distributions in the number of functional groups. This paper quantifies how chemical and physical polydispersity of polymers affects their solubility. Comparison of theoretical predictions with experimental measurements of lignin in a mixture of solvents shows that multiple molecular features can be described well using a single set of parameters, giving a tool to theoretically predict the selective solubility of polymers.
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Shulgin, Ivan L., i Eli Ruckenstein. "A protein molecule in an aqueous mixed solvent: Fluctuation theory outlook". Journal of Chemical Physics 123, nr 5 (sierpień 2005): 054909. http://dx.doi.org/10.1063/1.2011388.

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Roy, Nath, Lovely Sarkar i Kumar Sarkar. "Study of solute-solvent interactions of nicotinic acid and benzoic acid in methanol and its binary solvent systems". Journal of the Serbian Chemical Society 73, nr 12 (2008): 1235–46. http://dx.doi.org/10.2298/jsc0812235r.

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The apparent molar volumes, ?V, and viscosity B-coefficients, B, for nicotinic acid (NA) and benzoic acid (BA) in mixed solvents containing 10, 20, 30 mass % of n-amyl alcohol (n-AmOH) or isoamyl alcohol (i-AmOH) in methanol and in pure methanol (MeOH) were determined from the solution density and viscosity measurements at 298.15 K as function of concentrations of NA and BA. These results were, in conjunction with the results obtained in pure methanol, used to deduce the partial molar volumes of transfer, 0 ??V , and viscosity B-coefficients of transfer, ?B, for NA and BA from methanol to different mixed methanol solvents, in order to rationalize various interactions in the ternary solutions. An increase in the transfer properties of NA and BA with increasing mass % of n-AmOH and i-AmOH in methanol was observed and explained by the effect of structural changes and preferential solvation. Also, the free energies of viscous flow, ? 0? 1 ? and ? 0? ?2 , per mole of solvent and solute, respectively, were calculated and analyzed on the basis of the transition state theory of relative viscosity.
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Wang, Jiayuan, Lingyu Zhu i Richard Lakerveld. "A Hybrid Framework for Simultaneous Process and Solvent Optimization of Continuous Anti-Solvent Crystallization with Distillation for Solvent Recycling". Processes 8, nr 1 (2.01.2020): 63. http://dx.doi.org/10.3390/pr8010063.

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Anti-solvent crystallization is frequently applied in pharmaceutical processes for the separation and purification of intermediate compounds and active ingredients. The selection of optimal solvent types is important to improve the economic performance and sustainability of the process, but is challenged by the discrete nature and large number of possible solvent combinations and the inherent relations between solvent selection and optimal process design. A computational framework is presented for the simultaneous solvent selection and optimization for a continuous process involving crystallization and distillation for recycling of the anti-solvent. The method is based on the perturbed-chain statistical associated fluid theory (PC-SAFT) equation of state to predict relevant thermodynamic properties of mixtures within the process. Alternative process configurations were represented by a superstructure. Due to the high nonlinearity of the thermodynamic models and rigorous models for distillation, the resulting mixed-integer nonlinear programming (MINLP) problem is difficult to solve by state-of-the-art solvers. Therefore, a continuous mapping method was adopted to relax the integer variables related to solvent selection, which makes the scale of the problem formulation independent of the number of solvents under consideration. Furthermore, a genetic algorithm was used to optimize the integer variables related to the superstructure. The hybrid stochastic and deterministic optimization framework converts the original MINLP problem into a nonlinear programming (NLP) problem, which is computationally more tractable. The successful application of the proposed method was demonstrated by a case study on the continuous anti-solvent crystallization of paracetamol.
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Matteoli, Enrico. "Analysis of the enthalpy of solvation in mixed solvents using the Kirkwood-Buff theory. The interplay of preferential solvation and solvent-solvent interactions". Journal of Molecular Liquids 79, nr 2 (luty 1999): 101–21. http://dx.doi.org/10.1016/s0167-7322(98)00106-8.

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Rozprawy doktorskie na temat "Theory of mixed solvent"

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Pradhan, Rajendra. "Molecular interactions in mixtures of some industrially important solvents: a physico-chemical study". Thesis, University of North Bengal, 2018. http://ir.nbu.ac.in/handle/123456789/2698.

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Summers, Timothy Corneal. "HOW HACKERS THINK: A MIXED METHOD STUDY OF MENTAL MODELSAND COGNITIVE PATTERNS OF HIGH-TECH WIZARDS". Case Western Reserve University School of Graduate Studies / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=case1427809862.

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Choudhury, Ankan. "Physico-chemical investigation of solute-solute, solute-solvent and solvent-solvent interactions of some compounds in non-aqueous and mixed solvent media". Thesis, Th 541.34:C552p, 2005. http://hdl.handle.net/123456789/704.

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Bhattarai, Ajaya. "Polyelectrolyte-surfactant interactions in mixed solvent media". Thesis, University of North Bengal, 2010. http://hdl.handle.net/123456789/1321.

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Dakua, Vikas Kumar. "Physico-chemical studies on interactions between ion-solvent, ion-ion and solvent-solvent in aqueous and non-aqueous pure and mixed solvent systems". Thesis, University of North Bengal, 2008. http://hdl.handle.net/123456789/707.

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Aggarwal, S. "Studies on simulated nuclear waste of mixed solvent type". Thesis, University of Salford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.255339.

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Thanthiriwatte, Kanchana Sahan. "Solvent methods in coupled-cluster theory". Diss., Mississippi State : Mississippi State University, 2009. http://sun.library.msstate.edu/ETD-db/theses/available/etd-04032009-090013/.

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Hamilton, Patrick Neal. "The behavior and separation of polystyrene in mixed solvent systems". [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1256.

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Chavez, Krystle J. "Crystallization of pseudopolymorphic forms of sodium naproxen in mixed solvent systems". Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29759.

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Thesis (Ph.D)--Chemical Engineering, Georgia Institute of Technology, 2009.
Committee Chair: Rousseau, Ronald; Committee Member: Meredith, Carson; Committee Member: Prausnitz, Mark; Committee Member: Teja, Amyn; Committee Member: Wilkinson, Angus. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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Nandi, Prabir. "Solution properties of sodium carboxymethylcellulose in acetonitrile-water mixed solvent media". Thesis, University of North Bengal, 2009. http://hdl.handle.net/123456789/1350.

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Książki na temat "Theory of mixed solvent"

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Ulrich, Langer. Preconditioned Uzawa-type iterative methods for solving mixed finite element equations: Theory, applications, software. Karl-Marx-Stadt: Wissenschaftliche Schriftenreihe der Technischen Universität, 1987.

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Kokosa, John M. Solvent microextraction: Theory and practice. Hoboken, N.J: Wiley, 2009.

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M, Steenbrink J. H., red. Mixed hodge structures. Berlin: Springer, 2008.

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Yanagihara, Mitsuyoshi, i Minoru Kunizaki, red. The Theory of Mixed Oligopoly. Tokyo: Springer Japan, 2017. http://dx.doi.org/10.1007/978-4-431-55633-6.

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Jannsen, Uwe. Mixed Motives and Algebraic K-Theory. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/bfb0085080.

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Jannsen, Uwe. Mixed motives and algebraic K-theory. Berlin: Springer-Verlag, 1990.

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Hesse-Biber, Sharlene Nagy. Mixed methods research: Merging theory with practice. New York: Guilford Press, 2010.

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Coloring mixed hypergraphs: Theory, algorithms and applications. Providence, R.I: American Mathematical Society, 2002.

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Mixed methods research: Merging theory with practice. New York: Guilford Press, 2010.

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Hesse-Biber, Sharlene Nagy. Mixed methods research: Merging theory with practice. New York: Guilford Press, 2010.

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Części książek na temat "Theory of mixed solvent"

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Mohamed, Ali Khater, Ali Wagdy Mohamed, Ehab Zaki Elfeky i Mohamed Saleh. "Solving Constrained Non-linear Integer and Mixed-Integer Global Optimization Problems Using Enhanced Directed Differential Evolution Algorithm". W Machine Learning Paradigms: Theory and Application, 327–49. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-02357-7_16.

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Levine, Marc. "K-theory". W Mixed Motives, 357–69. Providence, Rhode Island: American Mathematical Society, 1998. http://dx.doi.org/10.1090/surv/057/08.

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Durlauf, Steven N., i Lawrence E. Blume. "Mixed Strategy Equilibrium". W Game Theory, 235–39. London: Palgrave Macmillan UK, 2010. http://dx.doi.org/10.1057/9780230280847_24.

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Levine, Marc. "Mixed Motives". W Handbook of K-Theory, 429–521. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/978-3-540-27855-9_10.

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Levine, Marc. "K-theory and motives". W Mixed Motives, 107–89. Providence, Rhode Island: American Mathematical Society, 1998. http://dx.doi.org/10.1090/surv/057/03.

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Tadros, Tharwat. "Mixed Film Theory". W Encyclopedia of Colloid and Interface Science, 730. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-20665-8_119.

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Călugăreanu, Grigore, Simion Breaz, Ciprian Modoi, Cosmin Pelea i Dumitru Vălcan. "Mixed groups". W Exercises in Abelian Group Theory, 295–317. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-0339-0_19.

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Călugăreanu, Grigore, Simion Breaz, Ciprian Modoi, Cosmin Pelea i Dumitru Vălcan. "Mixed groups". W Exercises in Abelian Group Theory, 95–104. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-017-0339-0_9.

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Lefebvre, Claire, i Pieter Muysken. "Module Interaction and Category Theory". W Mixed Categories, 273–87. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-3403-0_8.

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Espinola-Arredondo, Ana, i Felix Muñoz-Garcia. "Mixed Strategy Nash Equilibrium". W Game Theory, 105–49. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-37574-3_5.

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Streszczenia konferencji na temat "Theory of mixed solvent"

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Hu, Fan, Xuefang Zheng, Aisong Zhou, Shenmin Li, Dong-Qing Wei i Xi-Jun Wang. "The Mixed Quantum-Classical Molecular Dynamics Study of Vibrational Frequency Shift of I[sub 2] in Argon Solvent Confined by SWNT". W THEORY AND APPLICATIONS OF COMPUTATIONAL CHEMISTRY—2008. AIP, 2009. http://dx.doi.org/10.1063/1.3108375.

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Al-Murayri, M. T., A. AlFadhli, B. Baroon, A. Soltani, R. Garifullin, D. Rousseau, S. Bekri i E. Delamaide. "A Holistic EOS Model for Characterization of Northern Kuwait Extra-Heavy Oil Mixed with Liquid Solvents". W SPE Improved Oil Recovery Conference. SPE, 2024. http://dx.doi.org/10.2118/218273-ms.

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Abstract Liquid solvent injection is envisaged for extra-heavy oil extraction from the Lower Burgan Abdali (ADBG) reservoir in North Kuwait. This is a deep reservoir (9000 ft) where steam-assisted EOR methods are associated with a wide array of tehno-ecnomic challenges. This paper presents a methodology for creating a holistic Equation of State (EOS) describing the thermophysical properties of the selected solvents, extra-heavy oil, and their blend at different conditions. Such a model is essential for studying subsurface-to-surface variations in the mixture properties to assess the viability of solvent-assisted production. Representative extra-heavy downhole oil samples and two multi-component liquid solvents were investigated by performing high-pressure laboratory testing. Fluid density and viscosity were measured under varying conditions. A cubic EOS model was built to reproduce the extra-heavy oil lab-based PVT data. Simultaneously, another EOS model was developed for the two solvents. These EOS models were merged into a unified model to ensure pseudo-component overlap representation and lumping of the components for a correct extra-heavy oil and solvent mixture prediction. The viscosity modelling challenges and solutions for extra heavy-oil (with and without minor dissolved gas) and solvent mixtures were also investigated in detail. Lab evaluation using representative downhole oil samples (with minor dissolved gas) showed significant differences in the molecular weight of C36+ and the measured viscosity. A single EOS model was created using multi-fluid regression. The heaviest fraction had to be split into two pseudo-components coexisting in both samples but at different molar fractions. The components existing in both extra-heavy oil and solvent were lumped to avoid overlapping. It was demonstrated that the resulting EOS model can accurately reproduce the phase and volumetric behaviour of extra-heavy oil, solvent and their blend at different pressures and the reservoir temperature. Furthermore, it was noticed that the modified Lohrenz-Bray-Clark (LBC Heavy Oil) can predict the viscosities at isothermal conditions. For non-isothermal conditions, the viscosity of each pseudo-component is to be calculated at different temperatures in a tabulated format.
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"Mixed finite element method for solving problems of elasticity theory". W Уфимская осенняя математическая школа - 2022. 2 часть. Baskir State University, 2022. http://dx.doi.org/10.33184/mnkuomsh2t-2022-09-28.106.

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Gong, Xu, Hossein Shahandeh, Gordon Maclsaac, Hamed Motahhari, Mark Beckman i Lu Dong. "Cyclic Solvent Process Commercial Optimization". W SPE Canadian Energy Technology Conference. SPE, 2022. http://dx.doi.org/10.2118/208965-ms.

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Abstract Cyclic Solvent Process (CSP) is a non-thermal solvent-based heavy oil recovery technology that was invented and developed by Imperial Oil Resources Limited through a multi-year integrated research program. The commercial viability of potential development concepts and their associated uncertainties are also an active area of investigation. A key input to an economic model is the global (or development level) flow stream. The conventional approach of developing the global flow stream involves the determination of well schedule through a well prioritization algorithm that adheres to a set of flow stream capacity constraints. The resulting flow streams can then be passed to an economic tool to evaluate a set of KPIs (Key Performance Indicators) in an uncoupled manner. One of the main challenges encountered in this approach is that it is difficult to optimize the overall economic performance due to (1) the absence of well-defined objective function, (2) the decoupling of the flow stream generation and the economic calculations, (3) the pre-defined characteristics of the well prioritization algorithm. The main objective of this study is to develop a mathematical optimization model for CSP commercial projects. A two-stage optimization framework, which integrates Genetic Algorithm (GA) as master optimizer and Mixed Integer Linear Programming (MILP) as sub-optimizer, is described. A conceptual commercial scenario is simulated as a case study and economic uplift is demonstrated.
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Jang, Yong-Chull, H. J. Kim i Weonjong Lee. "Multi GPU Performance of Conjugate Gradient Solver with Staggered Fermions in Mixed Precision". W XXIX International Symposium on Lattice Field Theory. Trieste, Italy: Sissa Medialab, 2012. http://dx.doi.org/10.22323/1.139.0309.

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Ivanychev, D. A. "Solving the Mixed Problem of Elasticity Theory with Mass Forces for Transversal-Isotropic Body". W 2020 2nd International Conference on Control Systems, Mathematical Modeling, Automation and Energy Efficiency (SUMMA). IEEE, 2020. http://dx.doi.org/10.1109/summa50634.2020.9280697.

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Moustafa, Amira. "A Mixed Decision-Level Approach for Solving the Operating Room Scheduling Problem: A Case Study". W 2022 32nd International Conference on Computer Theory and Applications (ICCTA). IEEE, 2022. http://dx.doi.org/10.1109/iccta58027.2022.10206294.

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Haidl, J., Z. Chára i V. Matoušek. "Experimental Validation of Granular Flow Kinetic Theory Under Turbulent Flow Conditions". W Topical Problems of Fluid Mechanics 2022. Institute of Thermomechanics of the Czech Academy of Sciences, 2022. http://dx.doi.org/10.14311/tpfm.2022.011.

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The mixed classical and extended kinetic theory of granular flows is used for modeling the characteristics of particles-water turbulent sheet flow. The open-source solver sedFoam v3.1 is used for the 1-D and 2-D flow simulations. The simulation results are compared to the experimental data measured in the open channel. After that, the simulation parameters are optimized to achieve the best possible agreement between the simulation and the experimental results. The unsatisfactory performance of the KT models and the observed simulation instabilities are discussed.
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Terziev, Momchil, Tahsin Tezdogan i Atilla Incecik. "Influence of Mixed Flows on Ship Hydrodynamics in Dredged Channels". W ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/omae2019-95445.

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Abstract Although there is a significant body of research devoted to the shallow water hydrodynamic aspects of ships, several unexamined topics remain. Among these is that of critical outer flow in a dredged channel and its influence on parameters of interest. While empirical methods can be used with ease to resolve this, they can provide results with reliability sufficient only for an early design stage. On the other hand, more sophisticated potential flow theories are either inapplicable or do not perform well at the critical limit. However, RANS (Reynolds Averaged Navier-Stokes) – based tools can accurately capture all underlying phenomena without relying on limiting assumptions. This paper presents an attempt at comparing some results obtained via a CFD-based RANS solver and the slender body theory for critical outer flow in a dredged channel.
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Salimi, Hamidreza, Amin Ameri i Jan Nieuwerf. "Dimethyl Ether DME Solvent Based Enhanced-Oil-Recovery Technology - A Laboratory and Subsurface Study". W SPE Conference at Oman Petroleum & Energy Show. SPE, 2022. http://dx.doi.org/10.2118/200223-ms.

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Abstract DME as a water-soluble solvent for enhanced oil recovery has been introduced and some study results of DME enhanced waterflooding have recently been reported. However, DME-based EOR has not yet been implemented because of high prices of DME, the consequent need to recycle and reinject DME, and uncertain incremental oil per injected DME. This paper describes new insights into the different aspects (lab, subsurface, and economic) of DME-based EOR technology. An experimental protocol was defined to study the IFT, viscosity, and density of DME-Oil-brine mixtures as a function of T, P, and salinity, and DME compatibility with heavy components (e.g., asphaltenes), and adsorption on minerals. A compositional fractured-reservoir dynamic model that honors the PVT characteristics of DME was developed to investigate the performance of DME flood into fractured and unfractured reservoirs with light and heavy crudes. A business case as a function of DME recycling efficiencies, incremental oil, and phase implementation was discussed. The experimental results revealed that the oil viscosity 31 cP is significantly reduced to below 2 cP when mixed with DME in small volume ratios. No asphaltene precipitation (asphaltene content = 6.4 wt%) was observed when the oil was mixed with DME at increasing ratios up to 80 v/v%. Compatibility tests with formation water (total salinity 9.2 wt%) showed that DME is soluble in the formation water without any incompatibility or salting-out effect. The DME partitioning into oleic phase improves when temperature and brine-salinity increase. Imbibition tests at 5 bars and 50°C with DME-saturated formation water and limestone core plugs (permeability: 1.3–2.2 mD) increased the ultimate recovery to 70%. The simulation results indicate that DME injection into unfractured reservoirs does not improve the displacement efficiency, but it accelerates oil production because of improved injectivity up to 30%. However, DME injection into heavy-oil fractured reservoirs can improve displacement efficiency initially by enhancing imbibition rates from the matrix to the fracture system. However, this improved displacement efficiency decreases as DME injection continues because of DME breakthrough and there will be a point at which the DME displacement efficiency becomes the same as water. Nonetheless, DME significantly increases the recovery factor from heavy-oil fractured reservoirs (up to 200%). The economic results demonstrate that to have an economic DME-based EOR technology, the DME-recycling efficiency must be higher than 80%, incremental oil must be higher than 15%, and development must be a phased development plan.
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Raporty organizacyjne na temat "Theory of mixed solvent"

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Cummings, P. T., i J. P. O'Connell. Theoretical and experimental study of mixed solvent electrolytes. Office of Scientific and Technical Information (OSTI), styczeń 1990. http://dx.doi.org/10.2172/6453447.

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Cummings, P. T., i J. P. O'Connell. Theoretical and experimental study of mixed solvent electrolytes. Office of Scientific and Technical Information (OSTI), lipiec 1991. http://dx.doi.org/10.2172/6957847.

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Anderko, Andrzej, Peiming Wang, Robert D. Young, Douglas P. Riemer, Patrice McKenzie, Malgorzata M. Lencka, Sudarsanam Suresh Babu i Peter Angelini. Prediction of Corrosion of Alloys in Mixed-Solvent Environments. Office of Scientific and Technical Information (OSTI), czerwiec 2003. http://dx.doi.org/10.2172/811533.

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Jayaweera, Palitha. Mixed-Salt Based Transformational Solvent Technology for CO2 Capture. Office of Scientific and Technical Information (OSTI), marzec 2024. http://dx.doi.org/10.2172/2337752.

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Clark, Sue B. Controlling Actinide Hydration in Mixed Solvent Systems: Towards Tunable Solvent Systems to Close the Fuel Cycle. Office of Scientific and Technical Information (OSTI), październik 2016. http://dx.doi.org/10.2172/1330466.

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P.T. Cummings i J.P. O'Connell. Theoretical and experimental study of mixed solvent electrolytes. Final report. Office of Scientific and Technical Information (OSTI), styczeń 1995. http://dx.doi.org/10.2172/764042.

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Burrows, Wes, John S. Winterle, Robert B. Wilson i Jr. Services for Research into the Reactivity of Mustard in Mixed Solvent. Fort Belvoir, VA: Defense Technical Information Center, październik 1985. http://dx.doi.org/10.21236/ada161068.

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Prokopyev, Oleg A. New Theory and Methods in Stochastic Mixed Integer Programming. Fort Belvoir, VA: Defense Technical Information Center, lipiec 2014. http://dx.doi.org/10.21236/ada610045.

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Liaga, Emmaculate Asige. Towards Local Approaches and Inclusive Peacebuilding in South Sudan. RESOLVE Network, październik 2021. http://dx.doi.org/10.37805/pn2021.24.lpbi.

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The post-liberation peacebuilding in South Sudan, which largely drew from liberal peace theory, was employed between 2005 (after the signing of the Comprehensive Peace Agreement (CPA) and before the referendum, secession, and independence in 2011) and December 2013 (when it imploded into a civil conflict) and proved insufficient to sustain the fragile peace that briefly existed after the country’s secession from Sudan. After a protracted conflict lasting almost half a decade and the presence of multiple peace actors, the lack of a comprehensive and coordinated peacebuilding strategy proved detrimental. This failure is partly due to poor coordination between stakeholders and lack of local/domestic legitimacy, leading to insufficient peacebuilding and an aggravation of the 2013 conflict. Over the years, liberal peacebuilding strategies, which emphasize formal institution-building and statebuilding in fragile and conflict-affected environments, continue to produce mixed to poor results and fragile peace. This decline has resulted in the shifting of discourses and operations within peacebuilding, a paradigm shift that pays greater attention to localization and the local context in the conceptualization of peacebuilding objectives and strategies. This transformation promotes local ownership and inclusivity in peace processes and their dividends. The dialogue on inclusive peace has thus gained momentum, bearing a need to fully engage both states and societies in this process. The “local” in peacebuilding forms an important resource when solving root causes of conflicts, as in South Sudan, by improving awareness of the cultural and historical diversity in a given context.
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Stull, R. B. A theory for mixed-layer-top levelness over irregular topography. Office of Scientific and Technical Information (OSTI), grudzień 1992. http://dx.doi.org/10.2172/10112422.

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