Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 25 for “"solution theory"”.
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Binary gas adsorption on molecular sieves. Experimental data for the adsorption of oxygen, nitrogen and oxygen-nitrogen mixtures on five molecular sieve adsorbents at various temperatures and pressures and a comparison with theoretical models.
… model of Gonzalez and Holland, the vacancy solution model, the statistical thermodynamic model and a mathematical equation similar to the Hill-de Boer model. With the exception of the kinetic model, good curve fitting was obtained. Binary equilibria data have been measured, using a constant …
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Experimental and Theoretical Studies of Supercritical Fluid Behavior
… pressures, 1000, 2000 and 5000 psig and ideal solution theory as applied to mixtures of solids in a fluid suggest that a separation could be affected. However, the mixed solid solubility data indicate that no separation at 50(DEGREES)C is possible.
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The comparison of experimental and theoretical hydrate numbers
… with hydrate numbers calculated from the solid solution theory of van der Waals and Platteeuw as extended by Saito et al. and Nagata et al. Two methods were used for each experimental determination. Method I involved calculation of the difference in the number of moles of free gas in a closed …
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Binary molecular diffusivities in liquids: prediction and comparison with experimental data
"The Eyring rate theory equation has been modified successfully to enable predictions of binary molecular diffusivities for a wide variety of liquid-liquid systems. The activation free energy for binary diffusion has been evaluated in terms of the activation free energies for self diffusion of the …
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The Volumetric Properties for Selected Impurities in Dense CO2 Destined for Re-Injection
… Energy Equations of State and Fluctuation Solution Theory models. The optimized mixing parameters were validated by comparison to existing density measurements and/or bubble / dew point data. Finally, the mixing coefficients were utilized in a Gibbs Energy Minimization routine to optimize …
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Phase separation in solid mixtures of helium-3 and helium-4
… determined are in good agreement with regular solution theory and give little support for an asymmetry in the coexistence curve expected from a Nosanow-type model and reported from previous experiments using other signatures of phase separation. Differences in phase separation temperatures …
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Lithium-ion battery modeling using non-equilibrium thermodynamics
… Traditional battery modeling uses dilute solution kinetics and a fit form of the open circuit potential to model the discharge. This work expands on this original set of equations to include concentrated solution kinetics as well as thermodynamics-based modeling of the open circuit …
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Electrolyte Structure with Explicit Solvent in Nanoslit Capacitors using Classical Density Functional Theory
… such as electrochemistry, polymer science, and solution theory. Classical models to understand double layer thermodynamics is typically based on the Poisson-Boltzmann equation where solvent is treated implicitly as a dielectric background and ions are treated as point charges. Although this …
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Measurements of the Molar Heat Capacity and the Molar Excess Enthalpy for Various Alkanolamines in Aqueous Solutions
… (1-DEAP) in aqueous solutions by means of a C80 heat flow calorimeter over the entire range of mole fractions at different temperatures. The heat capacity measurements were carried out from 303.15K to 353.15K, whereas the excess enthalpies were measured at 298.15, …
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The development of h Homogeneous nucleation rate model for thermoplastic foams based on a molecular partition function and Fickian diffusion
… like those derived from classical nucleation theory, is made up of two parts, one that determines the size of the energy barrier in the nucleation process and one that estimates the forward rate of the process. A statistical-mechanical approach was used to create an energy term that is based …
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Investigation of injection moulding for novel drug delivery systems. An investigation into the use of injection moulding to produce pharmaceutical dosage forms and to understand the relationship between materials, processing conditions and performance, in particular drug release and stability
… of an amorphous molecular dispersion (i.e solid solution) in the case of all four systems. The phase separation behaviour and the amorphous stability of the systems was studied at various stress conditions. This revealed the “surface crystallisation” behaviour of the ibuprofen-HPMCAS systems. …
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Electrocatalytically induced liberation of mineral matter from coal
… while the balance may be attributed to acid dissolution and the loss of material during handling. Scanning electron micrographs of the coal samples taken before and after treatment show morphological changes consistent with the proposed EIL mechanism. The technique has been used successfully to …
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Synthesis and Characterization of Highly Porous Borazine-Linked Polymers via Dehydrogenation/Dehydrocoupling of Borane-Amine Adducts and Their Applications to Gas Storage
… 40 bar was calculated using the Ideal Adsorbed Solution Theory (IAST) to determine their performance as carbon capture and sequestration materials. Additionally, non-borazine containing nanoporous organic polymers (NPOFs) consisting of all carbon and hydrogen atoms were also synthesized and …
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Coupling in SPDEs and spectral analysis of heavy-tailed random operators
… Hilbert space, and the main contribution is a solution theory for such SPDEs when the coefficient in front of the white noise is only Hölder continuous with respect to the solution. The proof assumes non-degeneracy of the noise, and uses a generalized coupling technique that is the mixture of a …
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Designed Synthesis of Halogenated Borazine-Linked Polymers and Their Applications in Gas Storage and Separation
… for each polymer according to the ideal adsorbed solution theory (IAST). Three of the polymers, BLP-1(Br), BLP-2(Br), and BLP-10(Cl), possess excellent selectivity capabilities over 20 even at low pressures for all molar ratios. Additionally, these selectivity values increase further with …
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Migration of additives from thermoplastic polymers
… This implies the validity of simple regular solution theory to provide an adequate basis for understanding the solubility of additives in polymers The volubility of stabilisers from low density polyethylene films showed that of an additive from a polymer can be expressed in terms of a …
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The synergistic interaction between dithiophosphate and frothers at the air-water and mineral-water interface
… interface. At the air-water interface a regular solution theory approach, critical coalescence experiments and foam stability tests were used to quantify the interactions between DTP and frothers and compare them to xanthate and frothers. Microflotation and induction time experiments were …
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Building the 3D Genome from the Ground Up: Local Interactions Give Rise to Global Order
… a theoretical framework based on Flory-Huggins solution theory to derive pairwise internucleosome contact energies from the results of condense-seq, a novel experimental technique that measures the phase separation likelihood of native nucleosomes. I then use these derived energies to …
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Extreme Disorder in Metal–Organic Frameworks
… with surface area, virial, ideal adsorption solution theory and non-local density functional theory analyses. The results suggest disorder can be used to tune the adsorption capacity and selectivity in framework materials. Chapter 5 studies how disorder can be progressively introduced into …
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A comparison of thermodynamic models for the prediction of phase behavior in aqueous-polymer two-phase systems
… effort has been expended in the area of polymer solution theory, the theory of why these systems exhibit this extraordinary two-phase behavior that characterizes them as viable liquid-liquid extraction systems for use with biologically-active molecules is not completely understood. A …
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