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Relevant bibliographies by topics / Solid state gas phase equilibria

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Academic literature on the topic 'Solid state gas phase equilibria'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 February 2022

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Journal articles on the topic "Solid state gas phase equilibria"

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Shishatskii, Y. I., A. A. Derkanosova, and S. A. Tolstov. "Thermodynamics of phase equilibrium in solid-liquid and solid-gas systems." Proceedings of the Voronezh State University of Engineering Technologies 83, no. 1 (June 3, 2021): 30–35. http://dx.doi.org/10.20914/2310-1202-2021-1-30-35.

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The thermodynamic equilibrium of a two-phase system is described by the Gibbs equation, which includes state parameters. On the basis of the Gibbs equation and the combined equation of the first and second laws of thermodynamics, thermodynamic potentials are written: internal energy, enthalpy and Gibbs free energy. If the two phases are in equilibrium, then the temperatures, pressures and chemical potentials of these phases are equal to each other. Equalities express the conditions of thermal and mechanical equilibrium, as well as the condition for the absence of a driving force for the transfer of a component across the interface. For a two-phase system, the Gibbs-Duhem equation connects the volume and entropy of 1 mole of the mixture, the content of any component, expressed in mole fractions. Extraction from lupine particles with cheese whey (solid-liquid system) is considered. The driving force of the extraction process in the solid-liquid system is the difference between the concentration of the solvent at the surface of the solid C and its average concentration C0 in the bulk of the solution. The concentration at the interface is usually taken to be equal to the concentration of a saturated solution of Cn, since equilibrium is established rather quickly near the surface of a solid. Then the driving force of the process is expressed as Cn – C0. A curve for the extraction of extractives from lupine with cheese whey was plotted by superimposing low-frequency mechanical vibrations.

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Khan, Shadman H., Anupama Kumari, G. Dixit, Chandrajit B. Majumder, and Amit Arora. "Thermodynamic modeling and correlations of CH4, C2H6, CO2, H2S, and N2 hydrates with cage occupancies." Journal of Petroleum Exploration and Production Technology 10, no. 8 (September 14, 2020): 3689–709. http://dx.doi.org/10.1007/s13202-020-00998-y.

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Abstract The present work focuses on developing a framework for accurate prediction of thermodynamic conditions for single-component hydrates, namely CH4, CO2, N2, H2S, and C2H6 (coded in MATLAB). For this purpose, an exhaustive approach is adopted by incorporating eight different equations of states, namely Peng–Robinson, van der Waals, Soave–Redlich–Kwong, Virial, Redlich–Kwong, Tsai-Teja, Patel, and Esmaeilzadeh–Roshanfekr, with the well-known van der Waals–Platteeuw model. Overall, for I–H–V phase region, the Virial and van der Waals equation of state gives the most accurate predictions with minimum AAD%. For Lw–H–V phase region, Peng–Robinson equation of state is found to yield the most accurate predictions with overall AAD of 3.36%. Also, genetic programming algorithm is adopted to develop a generalized correlation. Overall, the correlation yields quick estimation with an average deviation of less than 1%. The accurate estimation yields a minimal AAD of 0.32% for CH4, 1.93% for C2H6, 0.77% for CO2, 0.64% for H2S, and 0.72% for N2. The same correlation can be employed for fitting phase equilibrium data for other hydrates too. The tuning parameter, n, is to be used for fine adjustment to the phase equilibrium data. The findings of this study can help for a better understanding of phase equilibrium and cage occupancy behavior of different gas hydrates. The accuracy in phase equilibria is intimately related to industrial applications such as crude oil transportation, solid separation, and gas storage. To date, no single correlation is available in the literature that can accurately predict phase equilibria for multiple hydrate species. The novelty of the present work lies in both the accuracy and generalizability of the proposed correlation in predicting the phase equilibrium data. The genetic programming generalized correlation is convenient for performing quick equilibrium prediction for industrial applications.

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Rosén, Erik, Barbro Saitton, Einar Uggerud, Jon Songstad, Harri Lönnberg, Enrique Colacio, A. M. Mulichak, et al. "Solid-State Emf Studies of Equilibria in the System Ca-S-O, using the Solid Couple (Cu, Cu2S) as Gas-Phase Buffer." Acta Chemica Scandinavica 43 (1989): 164–67. http://dx.doi.org/10.3891/acta.chem.scand.43-0164.

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BRILLIANTOV, NIKOLAI V., JÜRGEN SCHMIDT, and FRANK SPAHN. "NUCLEATION AND GROWTH OF A SOLID PHASE IN A GAS EXPANDING INTO VACUUM." International Journal of Modern Physics C 18, no. 04 (April 2007): 676–84. http://dx.doi.org/10.1142/s0129183107010930.

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We study kinetics of homogeneous nucleation in over-saturated vapor expanding from a reservoir through a long channel into vacuum. Assuming adiabatic conditions for the gas, we derive an equation of state which accounts for the phase transformation of vapor into the condensed phase. To describe the growth rate of particles of the new phase gas kinetic theory is employed. We find the size-distribution of these particles, the temperature and flux velocity along the channel. Calculations are performed for the particular case of water vapor expanding to vacuum from its equilibrium state at the triple point. These conditions correspond presumably to the formation of the gas-dust plume, recently detected at Enceladus – the icy moon of Saturn. Our results, therefore, shed some light on this interesting astrophysical phenomenon.

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Radić-Perić, J. "Formation of Gas Phase Boron and Carbon-Containing Molecular Species at High Temperatures." Materials Science Forum 555 (September 2007): 171–76. http://dx.doi.org/10.4028/www.scientific.net/msf.555.171.

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The formation of gas phase boron and carbon containing molecular species at high temperatures (thermal plasma) is investigated theoretically, by computing the equilibrium composition of the gas mixture containing boron, carbon, hydrogen and argon. The calculations are performed for the temperature range between 500 and 6000 K, B/C=1 and 2 and for the total pressure in the system of 1 bar. Use is made of the fact that the thermal plasma is plasma in local thermodynamic equilibrium, which makes possible theoretical determination (by employing the Gibbs free energy data for the compounds present in the system) of its equilibrium composition. From the calculated compositions of the investigated gas systems, presented in this paper, it was concluded that the initial molecule for cluster formation, as a connection between individual molecules and the solid state, in the case of the synthesis of solid boron carbide by means of thermal plasma should be the B2C molecule.

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Springer, Ronald D., Peiming Wang, and Andrzej Anderko. "Modeling the Properties of H2S/CO2/Salt/Water Systems in Wide Ranges of Temperature and Pressure." SPE Journal 20, no. 05 (October 20, 2015): 1120–34. http://dx.doi.org/10.2118/173902-pa.

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Summary To address the need to predict the properties of fluids in severe environments in the oil and gas industry, a comprehensive thermodynamic model has been developed for mixtures containing hydrogen sulfide (H2S), carbon dioxide (CO2), H2O, and selected salts. The model is based on the previously developed mixed-solvent electrolyte framework, which combines an equation of state for standard-state properties of individual species, an excess-Gibbs-energy model, and an algorithm for solving phase and chemical equilibria in multiphase systems. The standard-state properties are calculated from the Helgeson-Kirkham-Flowers (Helgeson et al. 1974a, 1974b, 1976, 1981; Tanger and Helgeson 1988) equation, whereas the excess Gibbs energy is expressed as a sum of a long-range electrostatic-interaction term expressed by a Pitzer-Debye-Hückel equation (Pitzer 1980), a virial coefficient-type term for interactions between ions, and a short-range term for interactions involving neutral molecules. The model has been parameterized using critically evaluated phase equilibrium data for various binary and ternary subsystems of the H2S/CO2/H2O/Na/Ca/Cl system and has been validated for temperatures ranging from 0 to 300°C, pressures up to approximately 3,500 atm, and salt concentrations up to solid saturation. The model reproduces chemical speciation in acid gas/brine systems as exemplified by the accurate prediction of pH. Because of its capability of predicting pH and activities of solution species, the model can serve as a foundation for studying metal/environment interactions in severe oil and gas environments.

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Kalyuzhnyi, S., A. Veeken, and B. Hamelers. "Two-particle model of anaerobic solid state fermentation." Water Science and Technology 41, no. 3 (February 1, 2000): 43–50. http://dx.doi.org/10.2166/wst.2000.0054.

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A structured mathematical model of anaerobic solid state fermentation (ASSF) has been developed. Since a stable ASSF requires addition of significant quantities of methanogenic seed sludge and mass-transfer limitation becomes important, the model postulates the existence of two different types of particles inside the fermenting solid mass – so-called “seed” particles with low biodegradability and high methanogenic activity and so-called “waste” particles with high biodegradability and low methanogenic activity. Any particle is assumed to be a completely mixed reactor and mass transfer of solutes between the particles is brought about by diffusion. The model includes multiple-reaction stoichiometry, microbial growth kinetics, material balances, liquid-gas interactions and liquid phase equilibrium chemistry. The theoretical model agrees on the qualitative level with existing experimental studies of ASSF. Hypothetical computer simulations are presented to illustrate the influence of biodegradabilityand mass transfer intensity on the stability of ASSF. On this basis, possible measures are proposed to prevent accumulation of volatile fatty acids inside the “seed” particles beyond their assimilative methanogenic capacity.

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Wardach-Święcicka, Izabela, and Dariusz Kardaś. "Modeling of heat and mass transfer during thermal decomposition of a single solid fuel particle." Archives of Thermodynamics 34, no. 2 (June 1, 2013): 53–71. http://dx.doi.org/10.2478/aoter-2013-0010.

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Abstract The aim of this work was to investigate the heat and mass transfer during thermal decomposition of a single solid fuel particle. The problem regards the pyrolysis process which occurs in the absence of oxygen in the first stage of fuel oxidation. Moreover, the mass transfer during heating of the solid fuels is the basic phenomenon in the pyrolysis-derived alternative fuels (gas, liquid and solid phase) and in the gasification process which is focused on the generation of syngas (gas phase) and char (solid phase). Numerical simulations concern pyrolysis process of a single solid particle which occurs as a consequence of the particle temperature increase. The research was aimed at an analysis of the influence of particle physical properties on the devolatilization process. In the mathematical modeling the fuel grain is treated as an ideal sphere which consists of porous material (solid and gaseous phase), so as to simplify the final form of the partial differential equations. Assumption that the physical properties change only in the radial direction, reduces the partial derivatives of the angular coordinates. This leads to obtaining the equations which are only the functions of the radial coordinate. The model consists of the mass, momentum and energy equations for porous spherical solid particle heated by the stream of hot gas. The mass source term was determined in the wide range of the temperature according to the experimental data. The devolatilization rate was defined by the Arrhenius formula. The results of numerical simulation show that the heating and devolatilization time strongly depend on the physical properties of fuel. Moreover, proposed model allows to determine the pyrolysis process direction, which is limited by the equilibrium state.

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Shahbazi, Mahboobeh, Henrietta Cathey, Natalia Danilova, and Ian Mackinnon. "Single Step Process for Crystalline Ni-B Compounds." Materials 11, no. 7 (July 22, 2018): 1259. http://dx.doi.org/10.3390/ma11071259.

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Crystalline Ni2B, Ni3B, and Ni4B3 are synthesized by a single-step method using autogenous pressure from the reaction of NaBH4 and Ni precursors. The effect of reaction temperature, pressure, time, and starting materials on the composition of synthesized products, particle morphologies, and magnetic properties is demonstrated. High yields of Ni2B (>98%) are achieved at 2.3–3.4 MPa and ~670 °C over five hours. Crystalline Ni3B or Ni4B3 form in conjunction with Ni2B at higher temperature or higher autogenous pressure in proportions influenced by the ratios of initial reactants. For the same starting ratios of reactants, a longer reaction time or higher pressure shifts equilibria to lower yields of Ni2B. Using this approach, yields of ~88% Ni4B3 (single phase orthorhombic) and ~72% Ni3B are obtained for conditions 1.9 MPa < Pmax < 4.9 MPa and 670 °C < Tmax < 725 °C. Gas-solid reaction is the dominant transformation mechanism that results in formation of Ni2B at lower temperatures than conventional solid-state methods.

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Nowakowska-Langier, Katarzyna, Rafal Chodun, and Krzysztof Zdunek. "Synthesis of multicomponent metallic layers during impulse plasma deposition." Materials Science-Poland 33, no. 4 (December 1, 2015): 841–46. http://dx.doi.org/10.1515/msp-2015-0077.

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AbstractPulsed plasma in the impulse plasma deposition (IPD) synthesis is generated in a coaxial accelerator by strong periodic electrical pulses, and it is distributed in a form of energetic plasma packets. A nearly complete ionization of gas, in these conditions of plasma generation, favors the nucleation of new phase of ions and synthesis of metastable materials in a form of coatings which are characterized by amorphous and/or nanocrystalline structure. In this work, the Fe–Cu alloy, which is immiscible in the state of equilibrium, was selected as a model system to study the possibility of formation of a non-equilibrium phase during the IPD synthesis. Structural characterization of the layers was done by means of X-ray diffraction and conversion-electron Mössbauer spectroscopy. It was found that supersaturated solid solutions were created as a result of mixing and/or alloying effects between the layer components delivered to the substrate independently and separately in time. Therefore, the solubility in the Fe–Cu system was largely extended in relation to the equilibrium conditions, as described by the equilibrium phase diagram in the solid state.

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Dissertations / Theses on the topic "Solid state gas phase equilibria"

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Smith, Vicky S. "Solid-fluid equilibria in natural gas systems." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/10095.

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Jäger, Andreas [Verfasser], Roland [Akademischer Betreuer] Span, and Cornelia [Akademischer Betreuer] Breitkoph. "Complex phase equilibria of gas hydrates and other solid and fluid phases modeled with highly accurate equations of state / Andreas Jäger. Gutachter: Roland Span ; Cornelia Breitkoph." Bochum : Ruhr-Universität Bochum, 2016. http://d-nb.info/1082425524/34.

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Philipp, Frauke. "Prinzipien der Syntheseplanung in der anorganischen Festkörperchemie: Analyse der Phasenbildung in Systemen M/P/Te, M = Ti,Ce,Si." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1234301400524-98886.

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Die ternären Systeme Ti/P/Te, Ce/P/Te und Si/P/Te wurden in der vorliegenden Dissertation hinsichtlich der Existenz neuer Verbindungen untersucht. Diese Verbindungen wurden insbesondere in Bezug auf ihre thermochemischen Eigenschaften charakterisiert. Durch Kombination von experimentellen Untersuchungen und thermodynamischen Modellierungen der ablaufenden Festkörper-Gasphasen-Gleichgewichte konnten die Synthesen der neuen Verbindungen optimiert werden. Abschließend erfolgte zudem die physikalische und kristallographische Charakterisierung der gefundenen Phosphidtelluride.

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Philipp, Frauke. "Prinzipien der Syntheseplanung in der anorganischen Festkörperchemie: Analyse der Phasenbildung in Systemen M/P/Te, M = Ti,Ce,Si." Doctoral thesis, Technische Universität Dresden, 2008. https://tud.qucosa.de/id/qucosa%3A23662.

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Die ternären Systeme Ti/P/Te, Ce/P/Te und Si/P/Te wurden in der vorliegenden Dissertation hinsichtlich der Existenz neuer Verbindungen untersucht. Diese Verbindungen wurden insbesondere in Bezug auf ihre thermochemischen Eigenschaften charakterisiert. Durch Kombination von experimentellen Untersuchungen und thermodynamischen Modellierungen der ablaufenden Festkörper-Gasphasen-Gleichgewichte konnten die Synthesen der neuen Verbindungen optimiert werden. Abschließend erfolgte zudem die physikalische und kristallographische Charakterisierung der gefundenen Phosphidtelluride.

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McKendrick, K. G. "Studies of gas phase species produced by infra-red lasers." Thesis, University of Oxford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355765.

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Nordström, Fredrik. "Solid-liquid Phase Equilibria and Crystallization of Disubstituted Benzene Derivatives." Doctoral thesis, KTH, Teknisk strömningslära, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4742.

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The Ph.D. project compiled in this thesis has focused on the role of the solvent in solid-liquid phase equilibria and in nucleation kinetics. Six organic substances have been selected as model compounds, viz. ortho-, meta- and para-hydroxybenzoic acid, salicylamide, meta- and para-aminobenzoic acid. The different types of crystal phases of these compounds have been explored, and their respective solid-state properties have been determined experimentally. The solubility of these crystal phases has been determined in various solvents between 10 and 50 oC. The kinetics of nucleation has been investigated for salicylamide by measuring the metastable zone width, in five different solvents under different experimental conditions. A total of 15 different crystal phases were identified among the six model compounds. Only one crystal form was found for the ortho-substituted compounds, whereas the meta-isomeric compounds crystallized as two unsolvated polymorphs. The para-substituted isomers crystallized as two unsolvated polymorphs and as several solvates in different solvents. It was discovered that the molar solubility of the different crystal phases was linked to the temperature dependence of solubility. In general, a greater molar solubility corresponds to a smaller temperature dependence of solubility. The generality of this relation for organic compounds was investigated using a test set of 41 organic solutes comprising a total of 115 solubility curves. A semi-empirical solubility model was developed based on how thermodynamic properties relate to concentration and temperature. The model was fitted to the 115 solubility curves and used to predict the temperature dependence of solubility. The model allows for entire solubility curves to be constructed in new solvents based on the melting properties of the solute and the solubility in that solvent at a single temperature. Based on the test set comprising the 115 solubility curves it was also found that the melting temperature of the solute can readily be predicted from solubility data in organic solvents. The activity of the solid phase (or ideal solubility) of four of the investigated crystal phases was determined within a rigorous thermodynamic framework, by combining experimental data at the melting temperature and solubility in different solvents and temperatures. The results show that the assumptions normally used in the literature to determine the activity of the solid phase may give rise to errors up to a factor of 12. An extensive variation in the metastable zone width of salicylamide was obtained during repeated experiments performed under identical experimental conditions. Only small or negligible effects on the onset of nucleation were observed by changing the saturation temperature or increasing the solution volume. The onset of nucleation was instead considerably influenced by different cooling rates and different solvents. A correlation was found between the supersaturation ratio at the average onset of nucleation and the viscosity of the solvent divided by the solubility of the solute. The trends suggest that an increased molecular mobility and a higher concentration of the solute reduce the metastable zone width of salicylamide.
QC 20100831

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McNaghten, Edward Dennison. "Some studies of gas phase vibrational energy transfer processes using the IR-UV double resonance technique." Thesis, Queen's University Belfast, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329391.

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Wright, Timothy Grahame. "Studies of some gas-phase oxidation reactions using electron spectroscopy and the electronic structure of some small molecules." Thesis, University of Southampton, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358873.

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Lazzaroni, Michael John. "Optimizing solvent selection for separation and reaction." Thesis, Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-07092004-124758/unrestricted/lazzaroni%5Fmichael%5Fj%5F200407%5Fphd.pdf.

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Thesis (Ph. D.)--School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 2005. Directed by Charles A. Eckert.
Charles L. Liotta, Committee Co-Chair ; Charles A. Eckert, Committee Chair ; Amyn S. Teja, Committee Member ; J. Carson Meredith, Committee Member ; Rigoberto Hernandez, Committee Member. Vita. Includes bibliographical references.

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Gamini, G. N. "Adriatic wave propagation in solid and gaseous Hesup(4) : a low temperature study of second sound in solid Hesup(4) and first sound in the gas phase." Thesis, University of Kent, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356565.

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Books on the topic "Solid state gas phase equilibria"

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Pedra, W. de Siqueira (Walter de Siqueira), 1975-, ed. Non-cooperative equilibria of Fermi systems with long range interactions. Providence, Rhode Island: American Mathematical Society, 2013.

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Book chapters on the topic "Solid state gas phase equilibria"

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Garrett, Steven L. "Attenuation of Sound." In Understanding Acoustics, 673–98. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44787-8_14.

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Abstract We will capitalize on our understanding of thermoviscous loss to develop an understanding of the attenuation of sound waves in fluids that are not influenced by proximity to solid surfaces. Such dissipation mechanisms are particularly important at very high frequencies and short distances (for ultrasound) or very low frequencies over geological distances (for infrasound). The Standard Linear Model of viscoelasticity introduced the nondimensional frequency, ωτR, that controlled the medium’s elastic (in-phase) and dissipative (quadrature) responses. Those response curves were “universal” in the sense that causality linked the elastic and dissipative responses through the Kramers-Kronig relations. That relaxation-time perspective is essential for attenuation of sound in media that can be characterized by one or more relaxation times related to those internal degrees of freedom that make their equation of state a function of frequency. Examples of these relaxation-time effects include the rate of collisions between different molecular species in a gas (e.g., nitrogen and water vapor in air), the pressure dependence of ionic association-dissociation of dissolved salts in sea water (e.g., MgSO4 and H3BO3), and evaporation-condensation effects when a fluid is oscillating about equilibrium with its vapor (e.g., fog droplets in air or gas bubbles in liquids).

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Fulara, Jan. "Matrix and Gas - Phase Spectroscopic Studies of Possible DIB Carriers." In Solid State Astrochemistry, 175–210. Dordrecht: Springer Netherlands, 2003. http://dx.doi.org/10.1007/978-94-010-0062-8_7.

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Montaño-Miranda, Gerardo, and Anthony Muscat. "Etching of Silicon Dioxide with Gas Phase HF and Water: Initiation, Bulk Etching, and Termination." In Solid State Phenomena, 3–6. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/3-908451-46-9.3.

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Guo, Guang Sheng, Ying Wang, Wen Ren, Fu Bo Gu, and Hong You Guo. "Gas-Sensitive Properties of Fe₂O₃ Nanoparticles Prepared by Laser-Induced Vapor-Phase Reaction." In Solid State Phenomena, 61–64. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/3-908451-30-2.61.

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Bokoch, S. M., and Valentin A. Tatarenko. "A Semi-Empirical Parameterization of Interatomic Interactions Based on the Statistical-Thermodynamic Analysis of the Data on Radiation Dif-fraction and Phase Equilibria in F.C.C.-Ni–Fe Alloys." In Solid State Phenomena, 303–18. Stafa: Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/3-908451-49-3.303.

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Krummacher, S., M. Biermann, M. Neeb, A. Liebsch, and W. Eberhardt. "Experimental Investigation of the Electronic Structure of Gas-Phase and Solid C60." In Springer Series in Solid-State Sciences, 93–98. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-85049-3_14.

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Dartois, E., L. D’hendecourt, F. Boulanger, J. L. Puget, M. Jourdain de Muizon, M. Breitfellner, and H. J. Habing. "Molecular Gas Phase Counterparts to Solid State Grain Mantle Features." In Formation and Evolution of Solids in Space, 139–45. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4806-1_9.

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Cabani, Sergio, and Paolo Gianni. "Gas-Liquid and Solid-Liquid Phase Equilibria in Binary Aqueous Systems of Nonelectrolytes." In Thermodynamic Data for Biochemistry and Biotechnology, 259–75. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-71114-5_10.

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Colinet, C., and A. Antoni-Zdziobek. "CVM Calculation of the Solid-State Equilibria in the Fe-Co Phase Diagram." In Properties of Complex Inorganic Solids 2, 261–66. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/978-1-4615-1205-9_20.

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Jackson, B., and M. Persson. "Eley-Rideal Dynamics of the Reaction of Gas-Phase H(D) with D(H) on Cu(111)." In Springer Series in Solid-State Sciences, 26–35. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-61185-8_2.

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Conference papers on the topic "Solid state gas phase equilibria"

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Chakraborty, Anutosh, Bidyut Baran Saha, Shigeru Koyama, Ibrahim Ibrahim El-Sharkawy, and Kim Choon Ng. "Theoretical Insight of Physical Adsorption for a Single Component Adsorbent+Adsorbate System." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-42943.

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The thermodynamic property surfaces for a single-component adsorbent + adsorbate system have been derived and developed from the view point of classical thermodynamics. These thermodynamic frameworks enable us to compute the specific heat capacity, partial enthalpy and entropy for the analyses of adsorption processes thoroughly. A theoretical framework for the estimation of the isosteric heat of adsorption between an adsorbate (vapor) and an adsorbent (solid) is also derived for the thermodynamic requirements of chemical equilibrium, Maxwell relations and the entropy of the adsorbed phase. Conventionally, the specific heat capacity of the adsorbate is assumed to correspond to its liquid phase specific heat capacity and more recently to that of its gas phase. We have shown here that the derived specific heat capacity fills up the information gap with respect to the state of adsorbed phase to dispel the confusion as to what is the actual state of the adsorbed phase.

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Wang, Lifeng, Xinkui He, Hao Teng, and Zhiyi Wei. "Gas-induced phase match phenomenon in high-order harmonic generation." In Advanced Solid State Lasers. Washington, D.C.: OSA, 2013. http://dx.doi.org/10.1364/assl.2013.jth2a.07.

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Hossain, Kamal, Michael Buck, Wolfgang Bernnat, and G. Lohnert. "TH3D: A Three-Dimensional Thermal Hydraulic Tool for Design and Safety Analysis of HTRs." In Fourth International Topical Meeting on High Temperature Reactor Technology. ASMEDC, 2008. http://dx.doi.org/10.1115/htr2008-58178.

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The institute of nuclear engineering and energy systems (IKE), University of Stuttgart, Germany has developed a new thermal hydraulic tool which can be used for three-dimensional thermal hydraulic analysis of pebble bed as well as block type HTRs. During nominal operation, the flow inside the gas-cooled High Temperature Reactor is essentially single-phase, compressible, and non-isothermal. So, at least one gas phase has to be considered beside the solid phase for thermal hydraulic analysis of HTRs. Each phase (e.g. solid, gas) is considered as a continuum which occupies only its respective fraction of the control volume. Thermal non-equilibrium is considered between phases and time dependent energy conservation equations for solid and gas phases are solved. Simplified momentum conservation equation for gas obtained from porous media approximation is solved along with the time dependent mass conservation equation. Provisions for simulating more than one gas component are available in this newly developed code TH3D which could be required for simulating some accident situations (e.g air / water ingress by pipes break). The interaction between phases is made by a set of constitutive equations which rely on semi-empirical correlations obtained from different experiments. Finite volume method with a staggered grid approach is used for spatial discretization and a fully implicit, time adaptive, multi step method is used for time-dependent discretization. A benchmark calculation which is oriented to the pebble type fuel reactor PBMR-400 and a 3D calculation were presented in HTR-2006 conference and will also be published in Nuclear Engineering and Design (NED) journal. In order to demonstrate the capabilities of TH3D for simulating all block type HTRs, a benchmark calculation which is proposed by IAEA CRP-3 and oriented to the Gas Turbine Modular Helium Reactor (GT-MHR) is performed. Calculations are performed for the steady state case (nominal operation) as well as for Loss of Forced Cooling (LOFC) with and without depressurization. The results obtained from TH3D are compared with the results obtained from several countries participated in this benchmark calculation program by using different code system. In this paper, results of this benchmark calculation and comparisons will be presented. A fuel model for pebble type fuel is implemented in TH3D where heterogeneity of heat production inside the fuel pebble is taken into account. The assumption of homogeneous heat production could be justified for steady state calculation or for slow transient but for fast transient calculation, the assumptions of homogeneous and heterogeneous heat production produce a huge difference for coupled thermal hydraulics and neutronics calculation. In order to show the capabilities of this newly developed code TH3D to couple with a neutronics system, it was coupled with a point kinetics model for a fast reactivity insertion case. In this case all control rods were withdrawn very quickly (with a velocity of 1 m/sec) to the end position. It was assumed that the scram signals were not activated when power or temperature was increased beyond a limiting value during this withdrawal process but the control rods system continued to be withdrawn up to the top position instead of getting down and the coolant flow was reduced by controlling the blowers. The neutronics feedback during this fast reactivity insertion case with homogeneous and heterogeneous fuel model will also be presented.

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Lawal, A. S., E. T. Van der Laan, and R. K. M. Thambynayagam. "Four-Parameter Modification of the Lawal-Lake-Silberberg Equation of State for Calculating Gas-Condensate Phase Equilibria." In SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 1985. http://dx.doi.org/10.2118/14269-ms.

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Yamaguchi, T., S. Nozawa, M. Fujikawa, J. F. de Marneffe, R. Chanson, K. B. Gavan, A. Rezvanov, and Fr Lazzarino. "Gas Phase Pore Stuffing for Damage Mitigation during Plasma Etching." In 2018 International Conference on Solid State Devices and Materials. The Japan Society of Applied Physics, 2018. http://dx.doi.org/10.7567/ssdm.2018.ps-3-11.

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Eniolorunda, Oluwakemi Victoria, Antonin Chapoy, and Rod Burgass. "Solid-Fluid Phase Equilibria Measurement for Mixtures of Methane, Carbon-Dioxide and N-Hexadecane." In SPE Nigeria Annual International Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/208245-ms.

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Abstract In this study, new experimental data using a reliable approach are reported for solid-fluid phase equilibrium of ternary mixtures of Methane-Carbon-dioxide- n-Hexadecane for 30-73 mol% CO2 and pressures up to 24 MPa. The effect of varying CO2 composition on the overall phase transition of the systems were investigated. Three thermodynamic models were used to predict the liquid phase fugacity, this includes the Peng Robison equation of state (PR-EoS), Soave Redlich-Kwong equation of state (SRK-EoS) and the Cubic plus Association (CPA) equation of state with the classical mixing rule and a group contribution approach for calculating binary interaction parameters in all cases. To describe the wax (solid) phase, three activity coefficient models based on the solid solution theory were investigated: the predictive universal quasichemical activity coefficients (UNIQUAC), Universal quasi-chemical Functional Group activity coefficients (UNIFAC) and the predictive Wilson approach. The solid-fluid equilibria experimental data gathered in this experimental work including those from saturated and under-saturated conditions were used to check the reliability of the various phase equilibria thermodynamic models.

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Li, L. L., E. L. Holthoff, L. A. Shaw, C. B. Burgner, and K. L. Turner. "PHASE NOISE SQUEEZING BASED PARAMETRIC BIFURCATION TRACKING OF MIP-COATED MICROBEAM MEMS SENSOR FOR TNT EXPLOSIVE GAS SENSING." In 2014 Solid-State, Actuators, and Microsystems Workshop. San Diego: Transducer Research Foundation, 2014. http://dx.doi.org/10.31438/trf.hh2014.24.

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Risse, Enrico, Oliver Mehl, Thomas Riesbeck, Anca Mocofanescu, and Hans J. Eichler. "Continuously pumped all-solid-state laser systems with fiber phase-conjugate mirror." In XIII International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference. SPIE, 2001. http://dx.doi.org/10.1117/12.414044.

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Guo, Xishan, Jing Zhang, Yinong Chen, Yujie He, Liren Wang, and Yinfei Zheng. "Ultrasensitive Surface Acoustic Wave Gas Sensor for Trace VOCs Detection Based on Sensing Mechanism of Gas-Liquid Phase Transition." In 2021 21st International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers). IEEE, 2021. http://dx.doi.org/10.1109/transducers50396.2021.9495547.

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Berger, Sandrine, Stéphane Richard, Florent Duchaine, and Laurent Gicquel. "Variations of Anchoring Pattern of a Bluff-Body Stabilized Laminar Premixed Flame as a Function of the Wall Temperature." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-56473.

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Aircraft engine components are subject to hostile thermal environments. The solid parts in the hot stages encounter very high temperature levels and gradients that are critical for the engine lifespan. Combustion chamber walls in particular exhibit very heterogeneous thermal fields. The prediction of this specific thermal field is a very complex task as it results from complex interactions between fresh gas injections, cooling flow distributions, combustion, flame stabilization and thermal transfers to the solids. All these phenomena are tightly coupled and do not evolve linearly. Today, the design phase of a combustion chamber is strongly enhanced by the use of high fidelity computations such as Large Eddy Simulations (LES). However, thermal boundary conditions are rarely well known and are thus treated either as adiabatic or as approximated isothermal conditions. Such approximations on thermal boundary conditions can lead to several errors and inaccurate predictions of the combustion chamber flow field. With this in mind and to foresee the potential difficulties of LES based Conjugate Heat Transfer (CHT) predictions, the effect of the wall temperature on a laminar premixed flame stabilization is numerically investigated in this paper for an academic configuration. The considered case consists of a squared cylinder flame holder at a low Reynolds number for which several wall-resolved Direct Numerical Simulations (DNS) are performed varying the bluff-body wall thermal condition. In such a set-up, the reactive flow and the flame holder interact in a complex way with an underlying strong impact of the wall temperature. For a baseline configuration where the flame holder wall temperature is fixed at 700K, the flow field is steady with a flame stabilized thanks to the recirculation zone of the flame holder. As the wall temperature is decreased, the position of the stabilized flame moves further downstream. The flame remains steady until a threshold cold temperature is reached below which an instability appears. For solid temperatures above 700 K, the flame is seen to move further and further upstream. For very hot conditions, the flame even stabilizes ahead of the bluff-body. The various flow solution bifurcations as the flame stabilization evolves are detailed in this paper. Heat flux distribution along the bluff-body walls are observed to be dictated by the flame stabilization process illustrating different mechanisms while integration of these fluxes on the whole flame holder surface confirms that various theoretical equilibrium states may exist for this configuration. This suggests that computation of more realistic cases including thermal conduction in the bluff-body solid part could lead to different converged results depending on the initial thermal state.

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Reports on the topic "Solid state gas phase equilibria"

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Chen, W. W., J. M. Zhang, A. J. Ardell, and B. Dunn. Solid-State Phase Equilibria in the ZnS-CdS System. Fort Belvoir, VA: Defense Technical Information Center, September 1988. http://dx.doi.org/10.21236/ada198982.

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