Results 1 to 10 of about 177,099 (169)

Investigating the Parameter-Driven Cathode Gas Diffusion of PEMFCs with a Piecewise Linearization Model

open access: yesEnergies, 2023
Improving mass transfer in gas diffusion layers is critical to achieving high-performance proton-exchange membrane fuel cells (PEMFCs). Leaks through the interface between the gas and the membrane electrode assembly frame have been widely investigated ...
Siwen Gu   +3 more
doaj   +1 more source

Relationship between pore structure and gas permeability of raw coal and briquette coal

open access: yesMeikuang Anquan, 2022
In order to study the correlation between the gas permeability coefficient and the pores characteristics of coal, the permeability coefficients of raw coal and briquette coal were measured, and the relationship between permeability and the pore ...
SUN Liang, JIA Nan, YANG Xing
doaj   +1 more source

Current Pulse-Based Measurement Technique for Zinc–Air Battery Parameters

open access: yesEnergies, 2023
Zinc–air batteries possess advantages such as high energy density, low operational costs, and abundant reserves of raw materials, demonstrating broad prospects for applications in areas like stationary power supplies and emergency power sources. However,
Lin Hu, Xianzhi Xu
doaj   +1 more source

PEEK–WC-Based Mixed Matrix Membranes Containing Polyimine Cages for Gas Separation

open access: yesMolecules, 2021
Membrane-based processes are taking a more and more prominent position in the search for sustainable and energy-efficient gas separation applications.
Marcello Monteleone   +7 more
doaj   +1 more source

Pore-Scale Lattice Boltzmann Simulation of Gas Diffusion–Adsorption Kinetics Considering Adsorption-Induced Diffusivity Change

open access: yesEnergies, 2020
The diffusion–adsorption behavior of methane in coal is an important factor that both affecting the decay rate of gas production and the total gas production capacity.
Zhigao Peng   +4 more
doaj   +1 more source

SHAPE OF GRAIN BOUNDARY GROOVE ONPURE ICE SURFACE

open access: yesAnales (Asociación Física Argentina), 2021
In this work we studied the evolution of the groove that forms the grain boundary (BG) when it emerges to a free surface, in the presence of different processes of matter transport.
C. L. Di Prinzio   +3 more
doaj   +1 more source

Gas Diffusion and Flow in Shale Nanopores with Bound Water Films

open access: yesAtmosphere, 2022
Shale reservoirs are rich in nanoscale pore-microfractures, and generally contain water (especially inorganic pores) under reservoir conditions. Therefore, evaluating gas flow capacity under water-bearing conditions is of great significance for analyzing
Tianyi Zhao, Yuan Ji
doaj   +1 more source

Investigation of the Shadow Effect in Focused Ion Beam Induced Deposition

open access: yesNanomaterials, 2022
Due to the precursor gas flow in the focused ion beam induced deposition process, a shadow effect appears behind the shading structures. This article carries out experiments with phenanthrene as the precursor gas and establishes a numerical model to ...
Chen Fang, Yan Xing
doaj   +1 more source

Diffusion of impurities in a granular gas [PDF]

open access: yesPhysical Review E, 2004
Diffusion of impurities in a granular gas undergoing homogeneous cooling state is studied. The results are obtained by solving the Boltzmann--Lorentz equation by means of the Chapman--Enskog method. In the first order in the density gradient of impurities, the diffusion coefficient $D$ is determined as the solution of a linear integral equation which ...
Garzo, V., Montanero, J. M.
openaire   +3 more sources

Study on Characteristic Parameters of Particulate Coal Gas Desorption and Diffusion Under Negative Pressure Environment

open access: yesMeikuang Anquan, 2020
In order to study the characteristic parameters of particulate coal gas desorption and diffusion within a negative pressure environment, a self-made particulate coal gas desorption experimental system was used to simulate the law of gas desorption and ...
ZHANG Hongtu, HAO Yushuang, WEI Jianping
doaj   +1 more source

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