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Ramesh C. Sharma - One of the best experts on this subject based on the ideXlab platform.
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Conductance Studies of Tetrabutylammonium Bromide, Sodium Bromide, and Sodium Tetraphenylborate in 2-Butoxyethanol (1) + Water (2) Mixtures at (298.15, 303.15, 308.15, and 313.15) K
Journal of Chemical & Engineering Data, 2012Co-Authors: Binod Sharma, Ramesh C. SharmaAbstract:Electrical conductances of solutions of tetrabutylammonium bromide (Bu4NBr), sodium bromide (NaBr), and sodium tetraphenylborate (NaBPh4) in 2-butoxyethanol (1) + water (2) mixture with 0.017, 0.037, 0.061, 0.092, and 0.132 mole fraction of 2-butoxyethanol have been reported at (298.15, 303.15, 308.15, and 313.15) K. The experimental values of electrical conductances are analyzed using the 1978 Fuoss conductance–Concentration Equation to obtain the values of limiting molar conductance (Λ0), ionic association constant (KA), and the association diameter (R). The values of KA and R obtained for these three salts, namely, tetrabutylammonium bromide, sodium bromide, and sodium tetraphenylborate, suggests a weak electrostatic ion–solvent interaction and that they exist as free ions in all the solvent compositions and the temperature range covered in this study. The Walden products of these salts deviate from ideal behavior with varying temperature and solvent composition.
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conductance studies of tetrabutylammonium bromide sodium bromide and sodium tetraphenylborate in 2 butoxyethanol 1 water 2 mixtures at 298 15 303 15 308 15 and 313 15 k
Journal of Chemical & Engineering Data, 2012Co-Authors: Binod Sharma, Ramesh C. SharmaAbstract:Electrical conductances of solutions of tetrabutylammonium bromide (Bu4NBr), sodium bromide (NaBr), and sodium tetraphenylborate (NaBPh4) in 2-butoxyethanol (1) + water (2) mixture with 0.017, 0.037, 0.061, 0.092, and 0.132 mole fraction of 2-butoxyethanol have been reported at (298.15, 303.15, 308.15, and 313.15) K. The experimental values of electrical conductances are analyzed using the 1978 Fuoss conductance–Concentration Equation to obtain the values of limiting molar conductance (Λ0), ionic association constant (KA), and the association diameter (R). The values of KA and R obtained for these three salts, namely, tetrabutylammonium bromide, sodium bromide, and sodium tetraphenylborate, suggests a weak electrostatic ion–solvent interaction and that they exist as free ions in all the solvent compositions and the temperature range covered in this study. The Walden products of these salts deviate from ideal behavior with varying temperature and solvent composition.
Binod Sharma - One of the best experts on this subject based on the ideXlab platform.
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Conductance Studies of Tetrabutylammonium Bromide, Sodium Bromide, and Sodium Tetraphenylborate in 2-Butoxyethanol (1) + Water (2) Mixtures at (298.15, 303.15, 308.15, and 313.15) K
Journal of Chemical & Engineering Data, 2012Co-Authors: Binod Sharma, Ramesh C. SharmaAbstract:Electrical conductances of solutions of tetrabutylammonium bromide (Bu4NBr), sodium bromide (NaBr), and sodium tetraphenylborate (NaBPh4) in 2-butoxyethanol (1) + water (2) mixture with 0.017, 0.037, 0.061, 0.092, and 0.132 mole fraction of 2-butoxyethanol have been reported at (298.15, 303.15, 308.15, and 313.15) K. The experimental values of electrical conductances are analyzed using the 1978 Fuoss conductance–Concentration Equation to obtain the values of limiting molar conductance (Λ0), ionic association constant (KA), and the association diameter (R). The values of KA and R obtained for these three salts, namely, tetrabutylammonium bromide, sodium bromide, and sodium tetraphenylborate, suggests a weak electrostatic ion–solvent interaction and that they exist as free ions in all the solvent compositions and the temperature range covered in this study. The Walden products of these salts deviate from ideal behavior with varying temperature and solvent composition.
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conductance studies of tetrabutylammonium bromide sodium bromide and sodium tetraphenylborate in 2 butoxyethanol 1 water 2 mixtures at 298 15 303 15 308 15 and 313 15 k
Journal of Chemical & Engineering Data, 2012Co-Authors: Binod Sharma, Ramesh C. SharmaAbstract:Electrical conductances of solutions of tetrabutylammonium bromide (Bu4NBr), sodium bromide (NaBr), and sodium tetraphenylborate (NaBPh4) in 2-butoxyethanol (1) + water (2) mixture with 0.017, 0.037, 0.061, 0.092, and 0.132 mole fraction of 2-butoxyethanol have been reported at (298.15, 303.15, 308.15, and 313.15) K. The experimental values of electrical conductances are analyzed using the 1978 Fuoss conductance–Concentration Equation to obtain the values of limiting molar conductance (Λ0), ionic association constant (KA), and the association diameter (R). The values of KA and R obtained for these three salts, namely, tetrabutylammonium bromide, sodium bromide, and sodium tetraphenylborate, suggests a weak electrostatic ion–solvent interaction and that they exist as free ions in all the solvent compositions and the temperature range covered in this study. The Walden products of these salts deviate from ideal behavior with varying temperature and solvent composition.
Purushottam Haldar - One of the best experts on this subject based on the ideXlab platform.
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Electrical Conductances of Tetraethylammonium Bromide and Tetrapropylammonium Bromide in 2-Ethoxyethanol (1) + Water (2) Mixtures at (308.15, 313.15, 318.15, and 323.15) K
Journal of Chemical & Engineering Data, 2005Co-Authors: Purushottam HaldarAbstract:The electrical conductances of the solutions of tetraethylammonium bromide (Et4NBr) and tetrapropylammonium bromide (Pr 4 NBr) in 2-ethoxyethanol (1) + water (2) mixed solvent media containing 0.25, 50, and 0.75 mass fractions of 2-ethoxyethanol (ω 1 ) have been reported at (308.15, 313.15, 318.15, and 323.15) K. The conductance data have been analyzed by the 1978 Fuoss conductance-Concentration Equation in terms of the limiting molar conductance (A°), the association constant (K A ), and the association diameter (R). These two electrolytes are found to exist essentially as free ions in the solvent mixtures with ω 1 = 0.25 and 50 over the entire temperature range; however, slight ionic association was observed in the mixed solvent medium richest in 2-ethoxyethanol. The electrostatic ion-solvent interaction is found to be very weak for the tetraalkylammonium ions in the aqueous 2-ethoxyethanol mixtures investigated.
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electrical conductances of tetraethylammonium bromide and tetrapropylammonium bromide in 2 ethoxyethanol 1 water 2 mixtures at 308 15 313 15 318 15 and 323 15 k
Journal of Chemical & Engineering Data, 2005Co-Authors: Purushottam HaldarAbstract:The electrical conductances of the solutions of tetraethylammonium bromide (Et4NBr) and tetrapropylammonium bromide (Pr 4 NBr) in 2-ethoxyethanol (1) + water (2) mixed solvent media containing 0.25, 50, and 0.75 mass fractions of 2-ethoxyethanol (ω 1 ) have been reported at (308.15, 313.15, 318.15, and 323.15) K. The conductance data have been analyzed by the 1978 Fuoss conductance-Concentration Equation in terms of the limiting molar conductance (A°), the association constant (K A ), and the association diameter (R). These two electrolytes are found to exist essentially as free ions in the solvent mixtures with ω 1 = 0.25 and 50 over the entire temperature range; however, slight ionic association was observed in the mixed solvent medium richest in 2-ethoxyethanol. The electrostatic ion-solvent interaction is found to be very weak for the tetraalkylammonium ions in the aqueous 2-ethoxyethanol mixtures investigated.
Wang Lizhen - One of the best experts on this subject based on the ideXlab platform.
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viscosity splitting scheme for Concentration Equation of miscible displacement with solute absorption in porous media
International Conference on Model Transformation, 2011Co-Authors: Cao Yanhua, Lv Guanghong, Wang LizhenAbstract:A lot of chemical reagents have been used to improve recovery ratio in petroleum exploitation, this process refers to solute absorption problem. On the condition of incompressible fluid, its mathematical scheme can be put in the form which is coupling nonlinear partial difference Equations about pressure, Concentration, and solute Concentration absorbing on the media surface. This paper introduces the miscible displacement problem first and then gives one operator-splitting method: Viscosity-Splitting method and its error analysis.
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viscosity splitting scheme for a class of Concentration Equation of miscible displacement with solute absorption in porous media
Journal of Jinggangshan University, 2011Co-Authors: Wang LizhenAbstract:We introduce a class of Concentration Equation of miscible displacement with solute absorption in porous media.Furthermore,we propose the viscosity-splitting method and its error analysis.
Zhiqiang Sun - One of the best experts on this subject based on the ideXlab platform.
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Simulation and experiment on airarc characteristics in low-voltage circuit breaker considering wall ablation
Diangong Jishu Xuebao Transactions of China Electrotechnical Society, 2009Co-Authors: Qiang Ma, Tie Jun Xu, Mingzhe Rong, Yi Wu, Anthony B Murphy, T Xu, Zhiqiang SunAbstract:The mathematical model of 3-dimentional air arc plasma considering the ablation of lateral walls is set up based on magnetic hydro-dynamics (MHD). The mass Concentration Equation is introduced to the model on the basis of traditional mass, momentum and energy Equations. The influence of wall ablation on the thermodynamic and transport properties is considered. The method of "view factors" is used to calculate the radiation reaching the lateral wall. By adopting the commercial computational fluid dynamics (CFD) package based on control-volume method, the above MHD model is solved and the distribution of temperature field, Concentration field, flow field and electrical potential field in the arc chamber is calculated. The simulation results indicate that the vapor Concentration behind the arc column is higher than that in front of the arc column because of the existence of "vortex" in the arc chamber. The use of gassing material causes arc voltage increase 19.2%, and causes the average arc velocity increase 20.1%. The experimental results prove the validity of the arc model.
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Simulation and experimental research on air arc movement characteristics in low-voltage circuit breaker considering electrodes erosion
Zhongguo Dianji Gongcheng Xuebao Proceedings of the Chinese Society of Electrical Engineering, 2009Co-Authors: Qiang Ma, Tie Jun Xu, Zhiqiang Sun, Mingzhe Rong, Yi Wu, Anthony B Murphy, Z.-q. SunAbstract:The mathematical model of 3-dimentional arc plasma considering the erosion of electrodes was set up based on magnetic hydro-dynamics (MHD). The Cu vapor mass Concentration Equation was introduced to the model on the basis of traditional mass, momentum and energy Equations. The influence of electrodes erosion on the thermodynamic and transport properties was considered. The arc-cathode model and arc-anode model were built aiming at the difference of cathode and anode. By adopting the commercial computational fluid dynamics (CFD) package based on control-volume method, the above MHD model was solved and the distribution of temperature field, Concentration field, flow field and electrical potential field in the arc chamber were calculated. The simulation results indicate that the maximal Cu vapor Concentration locates at the region behind the arc root because of the existence of 'double vortex' near electrodes. The simulated arc voltage considering the influence of Cu vapor is 12.3% lower than the result without considering the influence of Cu vapor. The simulated arc average speed considering the influence of Cu vapor is 21.3% lower than the result without considering the influence of Cu vapor. The experimental results prove the validity of the arc model. © 2009 Chin. Soc. for Elec. Eng.