Gas phase diffusion coefficient in cemented porous media[J] . Bo Elberling.Journal of Hydrology . 1996 (1)Eberling B (1996) Gas phase diffusion coefficient in cemented porous media. Journal of Hydrology 178:93-108Elberling B.: 1996. Gas phase diffusion coefficient in cemented porous media. ...
Thus, nitrous oxide has a density of 1.4 times that of oxygen, but the rate of gaseous diffusion of oxygen is only 1.2 times that of nitrous oxide. When a gas is diffusing into or through an aqueous phase the solubility of the gas in water becomes an important factor, and the diffusing...
The majority of fate and transport models are based on single component behavior modeled by Fick's Law using the pure gas phase diffusion coefficient. The enhancement of the individual diffusive flux in a multicomponent mixture observed in this study and accounted for by pseudo-advec-tive mass ...
gas phase atomspolysiloxanemolecular dynamics simulationsMolecular dynamics simulations have been carried out to examine mechanisms of small molecules' diffusion in amorphous polymer membranes. Polydimethylsiloxane (PDMS) structure consisting of three chains of 50 monomers each, were folded into periodic cells...
(Im)-rich regions would lead to zni-phase crystallization25. The linker ratio of the as-synthesized ZIF-62 was calculated from NMR21to contain the ratio of benzimidazole (bIm) to imidazole (Im) of 1.0:4.8 (Supplementary Fig.3) and the formation of ZIF-62 was confirmed using powder X-...
(phase transition) at 30°C, the permeability coefficients of the test gases exponentially increase with gas temperature and the temperature dependence curves do not exhibit an inflection in the glass transition region. On the other hand, the Arrhenius plots of the diffusion coefficients show a ...
2). During the expiratory phase, the velocity profile indicates higher values in the upper part of the cross-section. Due to this asymmetry, oxygen-rich gas is transported faster in the lower part of the airway cross-section and low-oxygen gas is efficiently cleared in the upper part of ...
phase-field variable at time equals 50 s. The spatial variation of the phase-field-dependent properties with change of the gradient-energy coefficient is given in Fig.1b. On the other hand, Fig.2shows the counterpart contours and curves when the temperature-dependent properties are used [31]...
The results indicated that nano-confinement effects could affect the diffusion coefficient through altering the phase properties, such as phase compositions and densities. Compared to bulk phase diffusivity, the effective diffusion coefficient in porous shale rock is reduced by 10 to 10 times as ...
Liquids and gas are disengaged in a high-pressure separation and the gas phase, contains hydrogen, is compressed and returned to the reactor. A purge must be taken from the recycle to prevent the buildup of light hydrocarbons in the reactor loop, which reduce the efficiency of reactor by ...