Results 1 to 10 of about 139,427 (163)

New insights into natural gas diffusion coefficient in rocks

Petroleum Exploration and Development, 2012
Based on the analysis of measuring methods and results of natural gas diffusion coefficient in rocks and the measurement of methane diffusion coefficient in the Upper Paleozoic rocks of the Ordos basin, this paper clarifies the meaning of natural gas ...
Guangdi LIU, Zhongying ZHAO, Mingliang SUN, Jian LI, Guoyi HU, Xiaobo WANG   +5 more
doaj   +3 more sources

A rapid and accurate direct measurement method of underground coal seam gas content based on dynamic diffusion theory

International Journal of Mining Science and Technology, 2020
Coal seam gas content is frequently measured in quantity during underground coal mining operation and coalbed methane (CBM) exploration as a significant basic parameter.
Yanwei Liu, Yang Du, Zhiqiang Li, Fajun Zhao, Weiqin Zuo, Jianping Wei, Hani Mitri   +6 more
doaj   +3 more sources

A new method for solving the fission gas diffusion equations with time-varying diffusion coefficient and source term considering recrystallization of fuel grains

Nuclear Materials and Energy, 2019
The fission gas swelling of nuclear fuels depends on the fission gas behavior in fuel grains, which will be accelerated by grain recrystallization occurred in some fuels.
Yunmei Zhao, Jingyu Zhang, Shurong Ding
doaj   +3 more sources

A Novel Time Lag Method for the Analysis of Mixed Gas Diffusion in Polymeric Membranes by On-Line Mass Spectrometry: Pressure Dependence of Transport Parameters

Membranes, 2018
This paper presents a novel method for transient and steady state mixed gas permeation measurements, using a quadrupole residual gas analyser for the on-line determination of the permeate composition.
Marcello Monteleone, Elisa Esposito, Alessio Fuoco, Marek Lanč, Kryštof Pilnáček, Karel Friess, Caterina Grazia Bezzu, Mariolino Carta, Neil Bruce McKeown, Johannes Carolus Jansen   +9 more
doaj   +3 more sources

Gas Steady-state Diffusion in Fractal Porous Media [PDF]

E3S Web of Conferences, 2021
Gas diffusion in fractal pores does not follow the classic Fick’s and Knudsen’s laws, so more research on gas diffusion in fractal porous media is needed. Fractal pore models are generated using the random walk method.
Zhehua Du
doaj   +1 more source

Application of Carbon Isotope Abundance Measurement by Mass Spectrometry in the Separation of Ethanol by Gas Diffusion Method

Journal of Isotopes, 2022
Ethanol is a feasible medium for diffusion separation of carbon isotopes. In order to obtain the separation coefficient of gas diffusion separation of ethanol, the application of elemental analysis isotope ratio mass spectrometry (EA-IRMS) to measure the
WANG Fei;PAN Jianxiong;ZHOU Mingsheng;JIANG Dongjun;LI Junjie
doaj   +1 more source

The Feasibility Study of Separating Carbon Isotope by Gas Diffusion Method Using Ethanol as Processing Gas

Journal of Isotopes, 2022
As a marker for isotope tracing technology, carbon-13 is widely used and the market demand is on the rise. In order to explore the separation method of carbon-13 isotope, a gas diffusion separation experiment using ethanol as the processing gas was ...
LI Junjie;PAN Jianxiong;ZHOU Mingsheng;JIANG Dongjun;WANG Fei
doaj   +1 more source

Experimental Study on Carbon Dioxide Separation by Gas Diffusion

Journal of Isotopes, 2021
With the promotion and popularization of carbon-13 breath detection test, the market demand for carbon-13 isotope products is on the rise. In order to explore the industrial separation method of carbon-13 isotope, a gas diffusion separation experimental ...
LI Junjie;PAN Jianxiong;ZHOU Mingsheng;JIANG Dongjun;SUN Wang
doaj   +1 more source

Compilation and evaluation of gas phase diffusion coefficients of reactive trace gases in the atmosphere: volume 1. Inorganic compounds [PDF]

Atmospheric Chemistry and Physics, 2014
Diffusion of gas molecules to the surface is the first step for all gas–surface reactions. Gas phase diffusion can influence and sometimes even limit the overall rates of these reactions; however, there is no database of the gas phase diffusion ...
M. J. Tang, R. A. Cox, M. Kalberer
doaj   +1 more source

Diffusion NMR methods applied to xenon gas for materials study [PDF]

Magnetic Resonance in Chemistry, 2002
AbstractWe report initial NMR studies of (i) xenon gas diffusion in model heterogeneous porous media and (ii) continuous flow laser‐polarized xenon gas. Both areas utilize the pulsed gradient spin‐echo (PGSE) techniques in the gas phase, with the aim of obtaining more sophisticated information than just translational self‐diffusion coefficients—a brief
Mair, R. W., Rosen, M. S., Wang, R., Cory, D. G., Walsworth, R. L.   +4 more
openaire   +3 more sources