Sfoglia per Soggetto "Chemistry, Physical"
Items 41-60 di 75
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Hydrogen production by ethanol steam reforming over a commercial Pd/-gamma-Al2O3 catalyst
(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
(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
(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. ... -
Influence of sintering additives of transition metals on the properties of gadolinium-doped barium cerate
(2008)In the present work the effect of MOx (where M =Cu, Ni, Zn, Fe, Co, Ti) addition on the densification behavior and electrical conductivity of BaCe(0.9)d(0.1)O(3-delta) ceramics is investigated. It was found that the small ... -
Investigation of a Ba(0.5)Sr(0.5)Co(0.8)Fe(0.2)O3-delta based cathode IT-SOFC - I. The effect of CO2 on the cell performance
(2006)A Ba0.5Sr0.5Co0.08Fe0.2O3-delta (BSCF) based cathode intermediate temperature solid oxide fuel cell (IT-SOFC) was fabricated and tested. The effect of carbon dioxide on the performance of BSCF cathode was evaluated at ... -
Investigation of a Ba0.5Sr0.5Co0.8Fe0.2O3-delta based cathode SOFCII. The effect of CO2 on the chemical stability
(2007)The effect of carbon dioxide on the chemical stability of a Ba0.5Sr0.5Co0.8Fe0.2O3-delta cathode in the real reaction environment at 450 degrees C was investigated by X-ray photoelectron spectroscopy (XPS), scanning electron ... -
Investigation of the oscillating bubble technique for the determination of interfacial dilatational properties
(1999)A mathematical framework is developed for measuring the dilatational rheological properties of gas-liquid interfaces by analyzing small amplitude radial oscillations of an air bubble blown into a liquid substrate. Contrary ... -
Investigation of the structural and electrical properties of Co-doped BaCe0.9Gd0.1O3-delta
(2011)In the present work the effect of cobalt oxide addition on the density and on the electrical properties of gadolinium-doped barium cerate is investigated. A series of BaCe0.9-xGd0.1CoxO3-delta (x = 0.00, 0.01, 0.03, 0.05, ... -
Low and non-platinum electrocatalysts for PEMFCs: Current status, challenges and prospects
(2012)Platinum-based nanomaterials are the most commonly adopted electrocatalysts for both anode and cathode reactions in polymer electrolyte membrane fuel cells (PEMFCs) fed with hydrogen or low molecular alcohols. However, the ... -
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 ... -
Methane catalytic and electrocatalytic combustion over perovskite oxides deposited on YSZ
(1998)The catalytic and the electrocatalytic behavior of La0.6Sr0.4Co0.8Fe0.2O3 Perovskite type oxide deposited on Yttria Stabilized Zirconia (YSZ) in the form of thin porous films, was studied during the reaction of methane ... -
A new method for the characterization of electrically conducting liquid bridges
(2000)An electrical conductance technique is employed in investigating the behavior of constant volume liquid bridges when their length is altered. The liquid bridges are edge-pinned between two vertical, identical rods with a ... -
Ni3+ adsorbate dynamics on a NiO(001) surface
(2006)We present results concerning the dynamical behavior of a Ni3+ adsorbate on a NiO(001) surface obtained by molecular dynamics simulations. In a first place, we examined at low temperature the position of the Ni3+ ion as ... -
Nitrogen-doped ordered mesoporous carbon: synthesis and active sites for electrocatalysis of oxygen reduction reaction
(2015)In the present work, a novel impregnation method, namely vaporization-capillary condensation method, is developed to synthesize nitrogen-doped ordered mesoporous carbon. This method allows for the preferential infiltration ... -
On the thermodynamic stability of retained austenite in 4340 steel
(1997)The effect of retained austenite on the mechanical behavior of quenched and tempered steels depends on its thermodynamic stability against mechanically-induced martensitic transformation during loading. In this work, the ... -
The oxidation of ethanol over Pt catalyst-electrodes deposited on ZrO2 (8 mol% Y2O3)
(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 ... -
Performance of a SOFC fed by ethanol reforming products
(2002)Performance of a Pt based anode solid oxide fuel cell (SOFC) fed with a gas mixture containing H-2, CO and CH4 (molar ratio 1: 1: 1) produced by external ethanol decomposition was studied, Experiments were performed at ... -
Performance of a SOFC Powered with External Ethanol Steam Reforming
(2001)In the present study, a solid oxide fuel cell (SOFC) system was considered being fed by the equilibrium products of the steam reforming of ethanol. The thermodynamic analysis of ethanol steam reforming was undertaken at ... -
Photocatalytic treatment of colored wastewater from medical laboratories: Photocatalytic oxidation of hematoxylin
(2006)The decolorization and organic content reduction of a synthetic Harris' Hematoxylin (SHH) solution, which is widely used in biochemical and biomedical laboratories, by the use of heterogeneous and homogeneous photocatalytic ... -
Probability from chaos
(2004)Chaos is argued to lie at the origin of probability in nature. This is supported by several results: natural probabilistic processes are components of Markov processes; and Markov processes arise as projections of chaotic ...