Results 11 to 20 of about 139,526 (262)

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

open access: yesMeitan 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   +4 more
doaj   +1 more source

Numerical analysis of ship flue gas diffusion characteristics and influence on air intake under calm weather

open access: yesZhongguo Jianchuan Yanjiu, 2021
ObjectiveIn order to prevent flue gas from polluting the ship deck and air intake, a numerical analysis of flue gas diffusion characteristics is carried out.
Xiaodong ZHUANG   +3 more
doaj   +1 more source

Research of influence of pressure and temperature on gas diffusion law

open access: yesGong-kuang zidonghua, 2015
For problems that gas adsorption-desorption method for determining gas diffusion coefficient is limited to coal particle and cannot apply confining pressure and set pressure arbitrarily, regular lump coal combined with gas chromatography analysis method ...
SU Heng   +3 more
doaj   +1 more source

Nonlinear Diffusion-Based Multifield Coupling Model for Thermally Enhanced CBM Recovery

open access: yesGeofluids, 2022
Thermal stimulation is a supplementary technique for enhancing gas recovery from coalbed methane (CBM) reservoirs that has received considerable attention worldwide. Investigating gas and heat transfer in coal seams during thermally enhanced CBM recovery
Rui Yang, Weiqun Liu, Jiakun Lv
doaj   +1 more source

Design of intelligent detection system of gas environment in roadway of coal mine inspection robot

open access: yesGong-kuang zidonghua, 2020
At present, most underground gas inspection robots use lifting mechanism or fixed probe to sense gas environment, which influences robot's driving flexibility, and due to the limitation of robot body mechanism, most inspection robots can only detect ...
NIE Zhen, MA Hongwei
doaj   +1 more source

Method for obtaining the Knudsen diffusion coefficient

open access: yesMethodsX, 2018
Recently, we developed a method for obtaining the Knudsen diffusion coefficient from the results of tracer experiments with a binary gas system and a porous medium in a column.
Yoshihiko Hibi
doaj   +1 more source

Electrocrystallization of CaCO3 Crystals Obtained through Phosphorylated Chitin

open access: yesCrystals, 2018
A phosphorylated chitin (Chi-P) derivative was synthesized and its chemical structure was verified with Fourier-transform infrared spectroscopy (FTIR), elemental analysis, and thermogravimetric techniques (TGA).
Nicole Butto   +2 more
doaj   +1 more source

An experimental methodology to assess the impact of desaturation on gas diffusion in clay based materials [PDF]

open access: yesE3S Web of Conferences, 2023
The transport of gas in clay-based materials is dominated by diffusion. SCK CEN has studied and recorded an extensive data set of diffusion coefficients of gases in various saturated clays (Boom Clay, Opalinus Clay, Callovo-Oxfordian claystone and ...
Gowrishankar Aadithya   +4 more
doaj   +1 more source

Study on Flow Model and Flow Equation of Shale Gas Based on Microflow Mechanism

open access: yesGeofluids, 2022
Shale gas storage and permeability space is between nanometers and micrometers and has strong multiscale characteristics, resulting in highly complicated shale gas flow.
Huaxun Liu   +6 more
doaj   +1 more source

Measurement of Gas Diffusion Coefficient in Highly Permeable Porous Media

open access: yesVadose Zone Journal, 2019
Gas diffusion is a fundamental transport process in porous media. However, to date, there is no method for experimentally estimating the gas diffusion coefficient of coarse porous media.
Elad Levintal   +3 more
doaj   +1 more source

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