Using a home-built reflectometer, we have investigated the changes in the optical reflectivity of a Pd(100) model catalyst during CO oxidation under high-pressure, high-temperature conditions. We observe changes in optical contrast when exposing the surface to CO oxidation conditions at 200 mbar from room temperature up to 400 °C. These changes in reflectivity are a result both of the formation...

meysam yarie was born in 1987 in malayer/ hamedan, iran. he received his b.sc. in applied chemistry (2010) from malek-ashtar university of technology and m.sc. in organic chemistry (2012) from kurdistan university under the supervision of dr. kamal amani. he is currently working towards his ph.d. under the supervision of professor mohammad ali zolfigol. his research interest is the synthesis, c...

Introduction The oxidation of CO on Pt catalysts has been shown to exhibit complex, non-linear behavior, such as reaction rate oscillations and spatio-temporal pattern formation over a wide range of reaction conditions [1]. At pressures above 1x10 Torr, individual regions of the catalyst surface are primarily coupled through thermal fluctuations within the catalyst itself or by variations in re...

The oxidation of biogenic dimethyl sulfide (DMS) emissions is a global source of cloud condensation nuclei. The amounts of the nucleating H2SO4(g) species produced in such process, however, remain uncertain. Hydrophobic DMS is mostly oxidized in the gas phase into H2SO4(g) + DMSO(g) (dimethyl sulfoxide), whereas water-soluble DMSO is oxidized into H2SO4(g) in the gas phase and into SO4(2-) + Me...

This work studied the removal of phenol from industrial effluents through catalytic ozonation in presence granular activated carbon a continuous fixed-bed reactor. Phenol was chosen as model pollutant because its environmental impact and high toxicity. Based on evolution total organic (TOC) concentration, kinetic proposed to study effect operational variables combined adsorption–oxidation (Ad/O...

The Caustic Aqueous Phase Electrochemical Reforming (CAPER) process can convert aqueous-phase ethanol to high-pressure and high-purity hydrogen (H2) at lower cell operating temperatures voltages than traditional methods. Additionally, any carbon dioxide (CO2) produced by the electrochemical oxidation is captured caustic electrolyte solution. Without using a membrane, only gas-phase species H2. ...

Organic-aerosol phase partitioning (volatility) and oxidative aging are inextricably linked in the atmosphere because partitioning largely controls the rates and mechanisms of aging reactions as well as the actual amount of organic aerosol. Here we discuss those linkages, describing the basic theory of partitioning thermodynamics as well as the dynamics that may limit the approach to equilibriu...

The use of an inorganic phase in water-in-oil (w/o) microemulsion has recently received considerable attention for preparing metal oxide nanoparticles. This is a technique, which allows preparation of ultrafine metal oxide nanoparticles within the size range 40 to 80 nm. Preparation of nano chromium (III) oxide studied investigated in the inverse microemulsion system. Therefore the nucleation o...

The CO2 Technology Centre Mongstad (TCM) is the world’s largest facility for testing and improving technologies for CO2 capture. The knowledge gained will prepare the ground for full scale CO2 capture initiatives to combat climate change. TCM is a joint venture between the Norwegian state, Statoil, Shell and Sasol. It is located at the West coast of Norway, north of the city Bergen. The centre ...

Titania nanotubes (TNTs) impregnated with Pd and Pt nanoparticles are evaluated as heterogeneous catalysts in different conditions two reactions: catalytic CO oxidation (gas phase, up to 500 °C) H2O2 direct synthesis (liquid 30 °C). The TNTs obtained via of titanium metal the intermediate layer-type sodium titanate Na2Ti3O7. Thereafter, layers exfoliated show self-rolling TNTs, which, finally, ...