Results 1 to 10 of about 836,304 (292)

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

Economic Analysis of Boron10 Isotope Production by Gas Diffusion Method

open access: yesJournal 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
doaj   +1 more source

Optimization of gas chamber design of mine-used catalytic methane sensor based on CFD

open access: yesMeikuang Anquan, 2021
In order to optimize the response speed of the catalytic methane sensor used in mine, the flow field and methane diffusion characteristics inside the sensor chamber were simulated and analyzed by computational fluid dynamics (CFD).
GU Renyong, JIANG Ze
doaj   +1 more source

Self-consistent Mean Field theory in weakly ionized media [PDF]

open access: yes, 2002
We present a self-consistent mean field theory of the dynamo in 3D and turbulent diffusion in 2D in weakly ionized gas. We find that in 3D, the backreaction does not alter the beta effect while it suppresses the alpha effect when the strength of a mean ...
Kim, Eun-Jin, Leprovost, Nicolas
core   +5 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

Analysis and theory of gas transport in microporous sol-gel derived ceramic membranes [PDF]

open access: yes, 1995
Sol-gel modification of mesoporous alumina membranes is a very successful technique to improve gas separation performance. Due to the formed microporous top layer, the membranes show activated transport and molecular sieve-like separation factors.
Burggraaf, A.J.   +4 more
core   +7 more sources

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