scholarly journals Mathematical Modeling of Electrode Processes – Potential Dependent Transfer Coefficient in Electrochemical Kinetics

10.5772/34286 ◽  
2012 ◽  
Author(s):  
Przemysaw T. ◽  
Piotr M.
Keyword(s):  
Mathematical Modeling ◽  
Transfer Coefficient ◽  
Electrochemical Kinetics ◽  
Electrode Processes

Mathematical modeling and experimental study of electrode processes

2014 ◽  
Vol 19 (2) ◽  
pp. 599-606 ◽  
Author(s):  
Kh. Z. Brainina ◽  
L. G. Galperin ◽  
M. A. Bukharinova ◽  
N. Yu. Stozhko
Keyword(s):  
Mathematical Modeling ◽  
Experimental Study ◽  
Electrode Processes

Study of the Process of Wastewater Treatment with Activated Caron from Dimethylamine and Dimethylformamide in their Joint Presence

2021 ◽  
Vol 25 (2) ◽  
pp. 18-22
Author(s):  
Yu.V. Solovyova ◽  
V.P. Yustratov ◽  
N.S. Golubeva ◽  
I.V. Vasiljeva ◽  
E.V. Nazimova
Keyword(s):  
Mathematical Modeling ◽  
Mass Transfer ◽  
Wastewater Treatment ◽  
Activated Carbon ◽  
Aqueous Solutions ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Adsorption Column ◽  
Limiting Stage ◽  
Column Process

The regularities and mechanism of adsorption of dimethylformamide and dimethylamine by industrial activated carbon in their joint presence from aqueous solutions are considered. The characteristics of equilibrium adsorption, the limiting stage, and the mass transfer coefficient have been determined. The main parameters of the adsorption column process and the mode of continuous cleaning are calculated by the method of mathematical modeling.

scholarly journals Mathematical modeling of two-phase media heat transfer coefficient in air cooled condenser systems

2018 ◽  
Vol 36 (1) ◽  
pp. 319-324 ◽  
Author(s):  
Yanán Medina ◽  
Nislan Khandy ◽  
Ken Carlson ◽  
Oscar Fonticiella ◽  
Osvaldo Morales
Keyword(s):  
Mathematical Modeling ◽  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Two Phase

scholarly journals Definition of the transfer coefficient in electrochemistry (IUPAC Recommendations 2014)

2014 ◽  
Vol 86 (2) ◽  
pp. 259-262 ◽  
Author(s):  
Rolando Guidelli ◽  
Richard G. Compton ◽  
Juan M. Feliu ◽  
Eliezer Gileadi ◽  
Jacek Lipkowski ◽  
...  
Keyword(s):  
Transfer Coefficient ◽  
Current Density ◽  
Cathodic Current Density ◽  
Anodic Current Density ◽  
Anodic Current ◽  
Cathodic Current ◽  
Electrode Processes ◽  
Green Book ◽  
Definition Of ◽  
Applied Electric Potential

Abstract The transfer coefficient α is a quantity that is commonly employed in the kinetic investigation of electrode processes. An unambiguous definition of the transfer coefficient, independent of any mechanistic consideration and exclusively based on experimental data, is proposed. The cathodic transfer coefficient αc is defined as –(RT/F)(dln|jc|/dE), where jc is the cathodic current density corrected for any changes in the reactant concentration on the electrode surface with respect to its bulk value, E is the applied electric potential, and R, T, and F have their usual significance. The anodic transfer coefficient αa is defined similarly, by simply replacing jc with the anodic current density and the minus sign with the plus sign. This recommendation aims at clarifying and improving the definition of the transfer coefficient reported in the 3rd edition of the IUPAC Green Book.

scholarly journals The analysis of uncertainty factors influence on mathematical modeling of ammonia compression in wet vapor area

2021 ◽  
Vol 5 (3) ◽  
pp. 30-38
Author(s):  
D. Kh. Sadvakasov ◽  
◽  
G. I. Chernov ◽  
V. L. Yusha ◽  
◽  
...  
Keyword(s):  
Mathematical Modeling ◽  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Variable Mass ◽  
Reciprocating Compressor ◽  
Compressor Stage ◽  
Uncertainty Factors ◽  
Working Chamber ◽  
The Heat Transfer Coefficient

The paper presents the influence analysis of such uncertainty factors as the heat transfer coefficient calculation method and the working chamber wall temperature on the mathematical modeling of the ammonia compression in a reciprocating compressor stage during the condensation of ammonia vapors. The mathematical model is based on the equation of the first law of thermodynamics for bodies with variable mass, the equation of state for real gases, the Clausius–Clapeyron and Newton–Richman equations. When determining the heat transfer coefficient value, several well-known dependencies for calculating these coefficients for dropwise and filmwise condensation have been considered. The calculation data shows that the instantaneous values of the ammonia pressure and temperature, as well as of the dryness fraction during compression in the wet steam region, significantly depends on the chosen method for calculating the heat transfer coefficient. Moreover, the walls temperature value of the compressor working chamber, where the compression occurs, has a considerable impact on the process under discussion. They are the determining factors and require special attention when the ammonia compression process is mathematically modelled in a reciprocating compressor stage, taking into account its vapors condensation.

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