The aqueous phase reforming (APR) of glycerol was studied using sonochemically synthesized 10%Ni-x%Ca/ZrO2 catalysts (where x = 0, 0.5, 3, and 5) for the production value-added liquid products. APR reaction performed in a batch reactor under following conditions: 20 bar, 230 °C 450 rpm, 1 h time. were characterized XRD, FESEM, BET, H2-TPR to observe effect Ca doping on physio-chemical propertie...

Hydrogen production via steam reforming of biomass derived oxygenates is a promising environmental alternative to the use fossil fuels. The ethanol reaction investigated over Ni and Rh based catalysts supported on ZrO2-La2O3 CeO2-ZrO2-La2O3 mixed oxides, aiming at elucidation role metal support in mechanism. versus shown be highly active more selective with no methane under all conditions studi...

This experimental study tackles the question how oxide ceramics (ZrO2 and HfO2) respond to the simultaneous exposure to two extreme conditions, pressures up to several ten GPa and irradiation with highly energetic (MeV-GeV) heavy ion projectiles. The combination of these two extreme conditions influences the materials in ways none of those two conditions alone could. In both materials, the expo...

A study has been presented on the effects of intrinsic mechanical parameters, such as surface stress, surface elastic modulus, surface porosity, permeability and grain size on the corrosion failure of nanocomposite coatings. A set of mechano-electrochemical equations was developed by combining the popular Butler-Volmer and Duhem expressions to analyze the direct influence of mechanical paramete...

The hydrodeoxygenation (HDO) activity of anisole has been investigated over Ni catalysts on mixed metal oxide supports containing NbZr and TiZr in 1:1 1:4 ratios. XRD patterns indicate the incorporation Ti (or Nb) into ZrO2 framework. XPS oxygen pulse chemisorption analyses reveal that Ni/Ti1Zr4 Ni/Nb1Zr4 possessed more vacancy sites than Ni/Ti1Zr1 Ni/Nb1Zr1, respectively. Correspondingly, HDO ...

ABSTRACT Infrared spectroscopy has been employed for a detailed characterization of ZrO2 and CeO2/ZrO2 supported nickel and copper/nickel catalysts to be utilized for methane decomposition. Adsorption of CO at 303 K was performed in order to determine the surface composition and accessible adsorption sites. Alloy formation occurred during reduction, as indicated by a red-shift of the vibrationa...