Πλοήγηση ανά Συγγραφέα "Tsiakaras, P. E."
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Adsorption and oxidation of methanol and ethanol on the surface of metallic and ceramic catalysts
Kirillov, S. A.; Tsiakaras, P. E.; Romanova, I. V. (2003)A short review of results obtained in latest infrared and Raman studies, with special reference to in situ measurements and first-principles quantum-mechanical investigations of adsorption and oxidation of alcohol molecules ... -
Basic principles for SOFC-based power plant exergetic analysis
Tsiakaras, P. E. (2009)In the present work, the basic theory of exergy analysis is presented and explained with simplified examples of SOFC-based power plants and the most important rules/ directions for the overall improvement are underlined. ... -
CeO2 based materials doped with lanthanides for applications in intermediate temperature electrochemical devices
Pikalova, E. Y.; Murashkina, A. A.; Maragou, V. I.; Demin, A. K.; Strekalovsky, V. N.; Tsiakaras, P. E. (2011)The present work aims at the investigation of the influence of different dopants' ionic radius and concentration on the lattice parameters and the density of Ce(1-x)Ln(x)O(2-delta) (x = 0-0.20; Ln = La, Nd, Sm, Eu, Gd, Dy, ... -
Charge transfer in mixed proton, oxygen ion and electron solid oxide conductor
Demin, A. K.; Gorbova, E. V.; Glumov, M. V.; Tsiakaras, P. E. (2005)Analysis of the equivalent scheme of the mixed proton-oxygen ion-electron conductor (MPOEC) allowed to obtain relationships between parameters of the membrane (total conductivity and transfer numbers) and parameters of the ... -
Charge transfer properties of BaCe(0.88)Nd(0.12)O(3-delta) co-ionic electrolyte
Gorbova, E.; Zhuravlev, B. V.; Demin, A. K.; Song, S. Q.; Tsiakaras, P. E. (2006)Charge and mass transfer in an electrochemical cell, based on an electrolyte possessing both oxygen ion and proton conductivity (co-ionic electrolyte), under the gradient of steam partial pressure was considered from ... -
The effect of co-dopant addition on the properties of Ln(0.2)Ce(0.8)O(2-delta) (Ln = Gd, Sm, La) solid-state electrolyte
Pikalova, E. Y.; Maragou, V. I.; Demina, A. N.; Demin, A. K.; Tsiakaras, P. E. (2008)The present work aims at the investigation of Ln(0.2)Ce(0.8)O(2-delta) (where Ln = Sm, La, Gd) structural and electrical properties when in the Ln sub-lattice, Ba2+ and Sr2+ with ionic radii 1.42 and 1.26 angstrom, ... -
Effect of dopants on CeO2 based solid state electrolytes for intermediate temperature electrochemical devices
Pikalova, E. Yu; Demin, A. K.; Bamburov, V. G.; Maragou, V. I.; Tsiakaras, P. E. (2011)The present work aims at the investigation of the influence of different dopants' ionic radii and their concentration on both the lattice parameters and the density of Ce1-xLnxO2-δ (x = 0-0.20; Ln = La, Nd, Sm, Eu, Gd, Dy, ... -
The effect of the parasitic current on the direct ethanol PEM fuel cell operation
Andreadis, G. M.; Podias, A. K. M.; Tsiakaras, P. E. (2008)In the present work the effect of the parasitic or leakage current, I, which is the result of the ethanol crossover through the polymer electrolyte membrane (PEM) from the anode to the cathode side of the cell, on both the ... -
Electricity from ethanol fed SOFCs: the expectations for sustainable development and technological benefits
Douvartzides, S. L.; Coutelieris, F. A.; Demin, A. K.; Tsiakaras, P. E. (2004)Based on a thermodynamic and economic analysis presented in the first part of this paper, ethanol is considered as an alternative fuel with suitable characteristics for electricity generation in SOFCs. Ethanol fed steam ... -
Electrochemically promoted catalysis: The case of ethanol oxidation over Pt
Douvartzides, S. L.; Tsiakaras, P. E. (2002)Ethanol oxidation was investigated over polycrystalline Pt films deposited on 8 mol% Y2O3-stabilized-ZrO2 (YSZ) in the temperature range of 300-350degreesC. It was found that electrochemical supply of oxygen anions (O2-) ... -
Forced convectional heat transfer in solid oxide fuel cells: An analytical treatment
Coutelieris, F. A.; Demin, A. K.; Douvartzides, S. L.; Tsiakaras, P. E. (2003)The heat transfer within a fuel cell at steady state conditions is considered here for one dimensional geometry. Analytical solution for the heat transfer equation accompanied by the appropriate boundary conditions is ... -
Fuel options for solid oxide fuel cells: a thermodynamic analysis
Douvartzides, S. L.; Coutelieris, F. A.; Demin, A. K.; Tsiakaras, P. E. (2003) -
Heat transfer phenomena in a solid oxide fuel cell: An analytical approach
Couteheris, F. A.; Douvartzides, S. L.; Tsiakaras, P. E. (2005)The steady-state heat transfer problem within a fuel cell is considered here. The original 2-D problem is defined while an averaging technique is used in order to reduce its dimensions to one. The full heat transfer equations ... -
Hydrogen production aided solid oxide electrochemical reformer fed with octane: A theoretical analysis
Murashkina, A. A.; Maragou, V. I.; Demin, A. K.; Pikalova, E. Y.; Tsiakaras, P. E. (2008)In the present work the possibility of pure hydrogen production by a solid oxide electrochemical reformer (SOER) is examined. Initial reagents are water steam, flowing into the cathode channel and octane flowing into the ... -
Hydrogen production by ethanol steam reforming over a commercial Pd/-gamma-Al2O3 catalyst
Goula, M. A.; Kontou, S. K.; Tsiakaras, P. E. (2004)In the present work the reaction of biomass-derived ethanol steam reforming for hydrogen rich gas streams production, over a commercial alumina supported palladium catalyst was investigated. In particular, the dependence ... -
Hydrogen production over a commercial Pd/Al2O3 catalyst for fuel cell utilization
Goula, M. A.; Kontou, S.; Zhou, W.; Qin, X.; Tsiakaras, P. E. (2003)In order to produce a hydrogen stream for fuel cell utilization, the study of the ethanol steam reforming process over an alumina supported palladium commercial catalyst was carried out. The effect of the reaction temperature, ... -
The influence of Fe, Cu, Al-doping on the crystal structure, thermal and electrical properties of calcium titanate
Murashkina, A. A.; Demina, A. N.; Demin, A. K.; Maragou, V. I.; Tsiakaras, P. E. (2008)CaTi(1-x)M(x)O(3-delta) (M=Fe, Al, Cu) samples were synthesized by the standard ceramic technology. The stability areas and the crystal structure of the solid solutions were determined by the X-ray Diffraction technique. ... -
A model-based parametric analysis of a direct ethanol polymer electrolyte membrane fuel cell performance
Andreadis, G. M.; Podias, A. K. M.; Tsiakaras, P. E. (2009)In the present work, a model-based parametric analysis of the performance of a direct ethanol polymer electrolyte membrane fuel cell (DE-PEMFC) is conducted with the purpose to investigate the effect of several parameters ... -
On the systematic optimization of ethanol fed SOFC-based electricity generating systems in terms of energy and exergy
Douvartzides, S. L.; Coutelieris, F. A.; Tsiakaras, P. E. (2003)An energy-exergy analysis was undertaken in order to optimize the operational conditions of a SOFC-based power plant fueled by ethanol. A certain plant configuration was contemplated, equipped with an external steam reformer, ... -
The oxidation of ethanol over Pt catalyst-electrodes deposited on ZrO2 (8 mol% Y2O3)
Tsiakaras, P. E.; Douvartzides, S. L.; Demin, A. K.; Sobyanin, V. A. (2002)The reaction of ethanol oxidation has been examined over a Pt polycrystalline film deposited on an yttria-stabilized zirconia (YSZ) electrochemical reactor. Experiments were carried out between 300 and 350 degreesC at ...