The super-saturation condition has to be provided to form gas hydrates. Consequently, the prediction of the guest molecule fraction in the aqueous phase is crucial in the study of the gas hydrate kinetics. In the present work, several experiments were carried out in a semi-batch reactor in order to determine the mole fraction of methane and ethane during gas hydrates formation (growth stage...

accurate estimation of hydrocarbon volume in a reservoir is important due to future development and investment on that reservoir. estimation of oil and gas reservoirs continues from exploration to end of reservoir time life and is usual upstream engineer’s involvements. in this study we tried to make reservoir properties models (porosity and water saturation) and estimate reservoir volume hydro...

Displacement of oil and water in porous media of reservoir rocks is described by relative                      permeability curves, which are important input data for reservoir performance simulation and drive mechanism studies. Many core studies, such as multiphase relative permeability, capillary pressure and saturation exponent determination, depend on the volume fractions of multiphase flui...

Gas diffusion layers (GDLs) are commonly known as one of the critical water management components in polymer electrolyte fuel cells with significant impact on electrochemical cell performance. Increasing levels liquid saturation GDLs, especially during high-current-density operation, limit gas transport from flow field channels to catalyst layer surfaces and hence reduce To provide GDL material...

A two-dimensional along-the-channel CFD (computational fluid dynamic) model, coupled with a twophase flow model of liquid water and gas transport for a PEM (proton exchange membrane) fuel cell is described. The model considers non-isothermal operation and thus the non-uniform temperature distribution in the cell structure. Water phase-transfer between the vapour, liquid water and dissolved phas...

The Xihu sag has two main oil−gas fields: Huagang Gas Field and Pinghu Oil Field. formation is the reservoir of in Central Tectonic Zone, while Western Slope Zone. In this paper, which mainly focusses on formation, we conducted gas-driven water displacement–magnetic resonance imaging (GWD-MRI) experiments to simulate charging characteristics sandstone migration layer, centrifugal magnetic (Cen-...

We performed a sequence of tests on a partially water-saturated sand sample contained in an x-raytransparent aluminum pressure vessel that is conducive to x-ray computed tomography (CT) observation. These tests were performed to gather data for estimation of thermal properties of the sand/water/gas system and the sand/hydrate/water/gas systems, as well as data to evaluate the kinetic nature of ...

The procedures for culturing the experimental organism, P. jhorescens, and for preparing the crude cell-free extract have been described previously (1). Partial Purification of Crude Enzyme Preparation-Powdered ammonium sulfate was added to a given volume of the crude cell-free extract to obtain 20 per cent saturation. The resulting precipitate was collected by centrifugation for 30 minutes at ...

A colorimetric method for detection and assay of mustard gas in urine after addition of thymolphthalein is reported. The detection limit was 80 ng/ml of llrine. Mustard gas could also be detected in urine after extraction with gas chromatography using FID detector. The detection limit was 10 ng/ml. In addition, thiodiglycol, a metabolite of mustard gas, could be converted to mustard with ...