Πλοήγηση ανά Θέμα "Electrochemistry"
Αποτελέσματα 21-40 από 53
-
Electrochemical properties of ceramic membranes based on SrTi0.5Fe0.5O3-delta in reduced atmosphere
(2012)The present work aims at the investigation of the electrochemical properties of SrTi0.5Fe0.5O3-delta as a membrane material for hydrogen production via electrochemical reforming. The dependence of the electrical conductivity ... -
Electrodes for solid electrolyte sensors for the measurement of CO and H-2 content in air
(2013)Using a test-tube made of yttria-stabilized zirconia (YSZ) as a measuring cell, different simple oxides MexOy (M = Zn, Sn, Cr, In), complex oxides with perovskite structure (La0.8Sr0.2CrO3 and La0.6Sr0.4MnO3) and silver ... -
Energy and exergy analysis of a solid oxide fuel cell plant fueled by ethanol and methane
(2003)The method of exergy analysis is presented for a SOFC power plant involving external steam reforming and fueled by ethanol and methane. The optimal operation parameters of the integrated SOFC plant are specified after ... -
Ethanol And Methane Fueled Solid Oxide Fuel Cells: A Comparative Study
(2001)Ethanol and methane are compared as candidate fuels for generation of electrical power in Solid Oxide Fuel Cells (SOFCs). The thermodynamic analysis of both alternatives was undertaken considering that a SOFC operates with ... -
Ethanol crossover phenomena and its influence on the performance of DEFC
(2005)In the present work, Nafion (R) membrane porosity changes were determined in aqueous ethanol solutions with different concentrations by weighing vacuum-dried and ethanol aqueous solution equilibrated membranes at room ... -
Ethanol Utilization In Solid Oxide Fuel Cells: A Thermodynamic Approach
(1999)A thermodynamic analysis of electrical power generation in ethanol fueled solid oxide fuel cells (SOFCs) was made in the temperature range between 800-1200 K at atmospheric total pressure. A SOFC was considered being fed ... -
Ethanol/water mixture permeation through a Nafion (R) based membrane electrode assembly
(2007)In the present work, the permeation behavior of ethanol/water mixtures through a Nafion((R))- 115 based membrane electrode assembly (MEA) has been investigated. The crossover measurements were carried out in a single fuel ... -
Forced convectional heat transfer in solid oxide fuel cells: An analytical treatment
(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 ... -
High temperature electrolyzer based on solid oxide co-ionic electrolyte: A theoretical model
(2007)In the present work a theoretical model of a solid oxide electrolyzer based on an electrolyte having both oxygen ion and proton conductivity is considered. The main parameters of the electrolytic process and an electrolyzer ... -
Hydrogen production aided by new (1-x) SrTi0.5Fe0.5O3-delta-xCe(0.8)(Sm0.8Sr0.2)(0.2)O2-delta(MIEC) composite membranes
(2014)In the present work, composite materials of the type (1-x)SrTi0.5Fe0.5O3-delta-xCe(0.8)(Sm0.8Sr0.2)(0.2)O2-delta (with x = 0, 0.25, 0.5, 0.75 and 1) are obtained by the two step solid state technique. Their transport ... -
Hydrogen production aided solid oxide electrochemical reformer fed with octane: A theoretical analysis
(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 over a commercial Pd/Al2O3 catalyst for fuel cell utilization
(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 importance of the fuel choice on the efficiency of a solid oxide fuel cell system
(2003)A simplified model has been formulated in order to easily and adequately determines the efficiency of a solid oxide fuel cell (SOFC) stack system, independently on the fuel choice. Simple analytical formulas for the ... -
Influence of Cu on the properties of gadolinium-doped barium cerate
(2008)In the present work the effect of copper oxide addition on the densification behavior and electrical conductivity of BaCe1-xGdxO3-delta (BCG) type ceramics is investigated. Small addition (1 mol%) of this sintering additive ... -
Insights on thermal and transport features of BaCe0.8-xZrxY0.2O3-delta proton-conducting materials
(2015)BaCe0.8-xZrxY0.2O3-delta-based materials (BCZYx, 0 <= x <= 0.8) are obtained through a modified citrate-nitrate combustion method at 1150 degrees C with following sintering at 1450 degrees C. Then their thermomechanical ... -
Investigation of the protonic conduction in Sm doped BaCeO3
(2008)In the present work the structural and electrical properties of samarium-doped barium cerate perovskites of BaCe1-xSmxO3-delta formula (with x=0-0.2), prepared by following the solid state reaction method, are investigated. ... -
Methane Activation on a La(0.6)Sr(0.4)Co(0.8)Fe(0.2)O(3) Perovsksite; Catalytic and Electrocatalytic Results
(1997)The catalytic and electrocatalytic behaviour of the La(0.6)Sr(0.4)Co(0.8)Fe(0.2)O(3) (LSCF) perovskite deposited on yttria stabilized zirconia (YSZ), was studied during the reaction of methane oxidation. Experiments were ... -
A model-based parametric analysis of a direct ethanol polymer electrolyte membrane fuel cell performance
(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 ... -
Novel composite solid state electrolytes on the base of BaCeO3 and CeO2 for intermediate temperature electrochemical devices
(2013)In the present work, nano-sized powders of (1-x)Ce0.8Sm0.2O2-delta-xBaCe(0.8)Sm(0.2)O(3-delta) (x = 0, 0.3, 0.5, 0.7 and 1) were obtained by solution combustion synthesis (self-combustion synthesis, SCS) method of nitrate ... -
PEMFCs and AEMFCs directly fed with ethanol: a current status comparative review
(2013)The last decade's research on the performance of proton-exchange membrane direct ethanol fuel cells (PEM-DEFCs) and anion exchange membrane direct ethanol fuel cells (AEM-DEFCs) is included in the present review. Future ...