Results 1 to 10 of about 663,725 (292)

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   +4 more sources

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
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Economic Analysis of Boron10 Isotope Production by Gas Diffusion Method

Journal of Isotopes, 2022
10B is an important isotope in neutron absorbing and neutron detecting. At present, the method of large-scale production of boron isotope is mainly chemical exchange distillation.
WANG Yanbo;SUN Wang;PAN Jianxiong;ZHOU Mingsheng
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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
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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
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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
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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

Measurement of gas diffusion through soils: comparison of laboratory methods [PDF]

Journal of Environmental Monitoring, 2008
Gas movement through soils is important for ecosystems and engineering in many ways such as for microbial and plant respiration, passive methane oxidation in landfill covers and oxidation of mine residues. Diffusion is one of the most important gas movement processes and the determination of the diffusion coefficient is a crucial step in any study ...
Suzanne E, Allaire, Jonathan A, Lafond, Alexandre R, Cabral, Sébastien F, Lange   +3 more
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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

Direct determination of the diffusion coefficient variation of coal based on Fick's law and model establishment

Meitan kexue jishu, 2023
Gas diffusion ability directly affects gas exploitation, outburst risk, emission and content determination. In order to study the influence of stress, gas pressure and temperature on gas diffusion coefficient in coal, the gas diffusion coefficient in ...
Yujin QIN, Fenghua AN, Weiwei SU, Hongfu JIA, Xiangjun CHEN   +4 more
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