Composition, Enthalpy, and Vaporization Temperature Calculation of Ag?SiO2 Plasmas with Air in the Temperature Range from 1000 to 6000�K and for Pressure Included between 1 and 50 bars

Rochette, David; Bussière, William; André, Pascal

doi:10.1007/s11090-004-2280-2

Cited by 29 publications

(15 citation statements)

References 13 publications

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“…The chemical equilibrium composition is determined as a function of temperature and pressure by finding the composition that minimizes the Gibbs free energy, which is a standard technique in equilibrium chemistry and described comprehensively in Refs. [27][28][29][30]. This method is applicable to closed isothermal and isobaric systems.…”

Section: Methods Of Calculation Of Plasma Compositionmentioning

confidence: 99%

Thermophysical Properties of High-Temperature Reacting Mixtures of Carbon and Water in the Range 400–30,000 K and 0.1–10 atm. Part 1: Equilibrium Composition and Thermodynamic Properties

Wang

Murphy

Yan

et al. 2011

Plasma Chem Plasma Process

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This paper is devoted to the calculation of the chemical equilibrium composition and thermodynamic properties of reacting mixtures of carbon and water at high temperature. Equilibrium particle concentrations and thermodynamic properties including mass density, molar weight, entropy, enthalpy and specific heat at constant pressure, sonic velocity, and heat capacity ratio are determined by the method of Gibbs free energy minimization, using species data from standard thermodynamic tables. The calculations, which assume local thermodynamic equilibrium, are performed in the temperature range from 400 to 30,000 K for pressures of 0.10, 1.0, 3.0, 5.0 and 10.0 atm. The properties of the reacting mixture are affected by the possible occurrence of solid carbon formation at low temperature, and therefore attention is paid to the influence of the carbon phase transition by comparing the results obtained with and without considering solid carbon formation. The results presented here clarify some basic chemical process and are reliable reference data for use in the simulation of plasmas in reacting carbon and water mixtures together with the need of transport coefficients computation.

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Section: Methods Of Calculation Of Plasma Compositionmentioning

confidence: 99%

Thermophysical Properties of High-Temperature Reacting Mixtures of Carbon and Water in the Range 400–30,000 K and 0.1–10 atm. Part 1: Equilibrium Composition and Thermodynamic Properties

Wang

Murphy

Yan

et al. 2011

Plasma Chem Plasma Process

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“…The internal energy of SiO 2 -Ag plasma is given in figure 8(c). The plasma internal energy defines the energy for a given set of the thermodynamic amounts: temperature, volume (or pressure for example in [23]) and density (amount of SiO 2 and Ag). In other words for a given amount of vaporized material one obtains the maximum energy which can be accumulated within the plasma.…”

Section: Electrical and Thermal Considerationsmentioning

confidence: 99%

“…And one has to keep in mind that theoretical studies concerned by fuses have to provide useful informations for industrial purposes. Figure 10 and Ag defined in weight percentage, the weight percentage of air being set to 2%) [23]. First for a given pressure the influence of the weight air percentage on the vaporization temperature is insignificant up to 2% air whatever the material.…”

Section: Electrical and Thermal Considerationsmentioning

confidence: 99%

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Electric fuses operation, a review: 1. Pre-arcing period

Bussière

2012

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Electrical needs are continously growing because of many various factors linked to increasing consumption and a green perception. This development -geographical, increasing production, growth of transport network, interconnection of continental networks, diversity of the transport technologies … -can not be dissociated from electrical safety considerations whatever the voltage level. For the three main levels of electric network -High Voltage, Middle Voltage and Low Voltage -one has to provide efficient electrical safety techniques or schemas which integrate different electrical safety apparatus. Among well-known apparatus we can cite SF 6 breakers, HV and MV switchgears (such as MV cells, MV and LV high current vacuum switchgears), and fuses. Electrical fuses are especially used in the MV and LV domains, sometimes as an additional safety device and sometimes as the main electrical safety component which is linked to the electrical current breaking function of electric fuse. In the paper, we will quickly depict the various kinds of electric fuses. We will especially focuss on the physical mechanisms -whatever the type of work, experimental, theoretical, modelling or empirical -prevailing during the pre-arcing period of the electric fuse operation.

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“…Nevertheless, in most of these papers, even at high pressure (>30 bar), only the first-order Debye-Hückel correction is taken into account [2,17]. Although this correction is necessary at high temperatures to consider the Coulombic interactions between the charged particles and others, it is not sufficient for low temperatures (around 300 K), where molecule interactions are important.…”

Section: Introductionmentioning

confidence: 99%

The Virial Effect—Applications for SF6 and CH4 Thermal Plasmas

2019

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A tool based on the mass action law was developed to calculate plasma compositions and thermodynamic properties for pure gases and mixtures, assuming a local thermodynamic equilibrium for pressures of up to 300 bar. The collection of the data that was necessary for tool calculation was automated by another tool that was written using Python, and the formats for the model were adapted directly from the NIST and JANAF websites. In order to calculate the plasma compositions for high pressures, virial correction was introduced. The influences of the parameters that were chosen to calculate the Lennard–Jones (12-6) potential were studied. The results at high pressure show the importance of virial correction for low temperatures and the dependence of the dataset used. Experimental data are necessary to determine a good dataset, and to obtain interaction potential. However, the data available in the literature were not always provided, so they are not well-adapted to a large pressure range. Due to this lack, the formulation provided by L. I. Stiel and G. Thodos (Journal of Chemical and Engineering Data, vol. 7, 1962, p. 234–236) is a good alternative when the considered pressure is not close to the critical point. The results may depend strongly on the system studied: examples using SF6 and CH4 plasma compositions are given at high pressure.

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Composition, Enthalpy, and Vaporization Temperature Calculation of Ag?SiO2 Plasmas with Air in the Temperature Range from 1000 to 6000�K and for Pressure Included between 1 and 50 bars

Cited by 29 publications

References 13 publications

Thermophysical Properties of High-Temperature Reacting Mixtures of Carbon and Water in the Range 400–30,000 K and 0.1–10 atm. Part 1: Equilibrium Composition and Thermodynamic Properties

Thermophysical Properties of High-Temperature Reacting Mixtures of Carbon and Water in the Range 400–30,000 K and 0.1–10 atm. Part 1: Equilibrium Composition and Thermodynamic Properties

Electric fuses operation, a review: 1. Pre-arcing period

The Virial Effect—Applications for SF6 and CH4 Thermal Plasmas

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