The kinetics of liquid phase semiconductor photocatalytic and photoassisted reactions are an area of some debate, reignited recently by an article by Ollis(1) in which he proposed a simple pseudo-steady-state model to interpret the Langmuir-Hinshelwood type kinetics, commonly observed in such systems. In the current article, support for this model, over other models, is provided by a reinterpre...

Abstract Gas to liquid (GTL) process involves heterogeneous catalytic chemical reactions that convert synthesis gas to hydrocarbons and water vapor. A three phase reactor, called Low temperature Fischer-Tropsch (LTFT) is commonly applied for GTL process. In this reactor the gaseous phase includes the synthesis gas, light hydrocarbons and water vapor, the liquid phase is a mixture of the h...

The fabrication of ultrathin-ring electrodes with a diameter of 2 mm and a thickness of 100 nm is established. The ultrathin-ring electrodes provide a large density of pseudo-steady-state currents, and realize pseudo-steady-state amperometry under quiescent conditions without a Faraday cage. Under the limiting current conditions, the current response at the ultrathin-ring electrode can be well ...

In situ non-intrusive measurements of water vapor partial pressure and temperature were performed simultaneously along two gas channels on he cathode side of a PEM fuel cell using tunable diode laser absorption spectroscopy. This measurement technique developed by us was utilized arlier to make measurements in a single bipolar plate channel of a prototype PEM fuel cell. The current study examin...

three-phase (e.g., water, oil, and gas) flow in porous media, includcomplex than the corresponding two-phase curves. It is ing phase, global, and pseudo-global pressure-saturation formulathe complexity of these three-phase curves that complitions, are discussed in this paper. Comparisons of these differential cates the derivation of the global pressure-saturation form formulations are theoretic...