Results 21 to 30 of about 177,198 (268)

Investigation of Molecular Mean Free Path, Molecular Kinetic Energy, and Molecular Polarity Affecting Knudsen Diffusivity along Pore Channels

Separations, 2022
The effective purification of corrosive gases at the cathode air stream side is essential for proton exchange membrane fuel cells’ performance in real-world applications. Gas molecular diffusion depth along the pore channel is a sufficient parameter that
Bin Xu, Haotian Qin, Lu Chen
doaj   +1 more source

Electrochemical Impedance Spectroscopy to Evaluate the Effect of Pressure Exerted in the Hot-Pressing Stage on the Performance of PEMFC

International Journal of Electrochemical Science, 2012
Hot-pressing is one of the most important stages in fabrication of the membrane electrode assembly in a single cell of proton exchange membrane fuel cells (PEMFCs).
Fu-Pin Ting, Jing-Chie Lin, Chien-Ming Lai, San-Der Chyou, Kan-Lin Hsueh   +4 more
doaj   +1 more source

A User Manual to Measure Gas Diffusion Kinetics in Plants: Pneumatron Construction, Operation, and Data Analysis

Frontiers in Plant Science, 2021
The Pneumatron device measures gas diffusion kinetics in the xylem of plants. The device provides an easy, low-cost, and powerful tool for research on plant water relations and gas exchange.
Christophe L. Trabi, Luciano Pereira, Luciano Pereira, Luciano Pereira, Xinyi Guan, Marcela T. Miranda, Paulo R. L. Bittencourt, Rafael S. Oliveira, Rafael V. Ribeiro, Steven Jansen   +9 more
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The Establishment of Computational Model and Analysis of Elastomer Failure Induced by Rapid Gas Decompression

Shiyou jixie, 2020
When the ambient is rapidly decompressed, the gas dissolved in the rubber cannot be released quickly and expand, causing the rubber to bulge or even rupture, resulting in seal failure.
Chen Mingzhan, Wang Suling, Jiang Minzheng, Li Jinbo   +3 more
doaj  

Nonisothermal two‐phase modeling of the effect of linear nonuniform catalyst layer on polymer electrolyte membrane fuel cell performance

Energy Science & Engineering, 2020
In this research, it is investigated to numerically evaluate the performance of a polymer electrolyte membrane fuel cell (PEMFC). The performance is investigated through the nonuniformity gradient loading at the catalyst layer (CL) of the considered ...
Seyedali Sabzpoushan, Hassan Jafari Mosleh, Soheil Kavian, Mohsen Saffari Pour, Omid Mohammadi, Cyrus Aghanajafi, Mohammad Hossein Ahmadi   +6 more
doaj   +1 more source

Research of influence of pressure and temperature on gas diffusion law

Gong-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, YANG Yong, CHEN Lianfang, ZHAO Jun   +3 more
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The influence of coal pore structure on gas desorption-diffusion-seepage process

Gong-kuang zidonghua
Fully understanding the mechanism of coal seam gas migration is the fundamental prerequisite for improving extraction efficiency. At present, research on the micro migration features of coal gas mostly focuses on the micro pore gas migration features of ...
JIA Nan
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Highly Sensitive Photoacoustic Microcavity Gas Sensor for Leak Detection

Sensors, 2020
A highly sensitive photoacoustic (PA) microcavity gas sensor for leak detection is proposed. The miniature and low-cost gas sensor mainly consisted of a micro-electro-mechanical system (MEMS) microphone and a stainless-steel capillary with two small ...
Ke Chen, Yewei Chen, Bo Zhang, Liang Mei, Min Guo, Hong Deng, Shuai Liu, Fengxiang Ma, Zhenfeng Gong, Qingxu Yu   +9 more
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FLATTENING OF A SCRATCH ON SINGLE CRYSTAL ICE SURFACE

Anales (Asociación Física Argentina), 2020
The surface of a monocrystalline ice sample was observed at−5◦C (268 K). For which it was superficially polished and allowed to evolve in the presence of activated silica gel for three hours.
G. Aguirre Varela, D. Stoler Flores, P. I. Achával, C. L. Di Prinzio   +3 more
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Gas diffusion Electrode.

Journal of the Surface Finishing Society of Japan, 1991
Disclosed herein is a gas diffusion electrode comprising a reaction layer and a gas diffusion layer attached to each other characterized in that a plurality of apertures or a concave convex surface is provided on or through the electrode to facilitate the flowing of an electrolyte.
openaire   +3 more sources