gas diffusion
Thermal conductivity measurement of gas diffusion layer used in PEMFC
... of Gas Diffusion Layer (GDL) used in PEM fuel ...of Gas Diffusion Layer (GDL) as a function of temperature and compression and were carried out on two commercially available GDL samples – ...
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Methane oxidation in homogenous soil covers of landfills: a finite element analysis of the influence of gas diffusion coefficient
... Distribution of methane concentration for a range of relative gas diffusion coefficients from 0.005 to 0.2 is presented in Fig. 2. As it can be noted there is only a small differentiation of the oxygen ...
8
Preparation, characterization and comparative study of gas diffusion layer for pem fuel cell
... the gas diffusion media is sandwiched between the bipolar plate and the catalyst layer to form the gas diffusion layer mass transport losses which cause overvoltage due to which the cell ...
8
A NEW GAS DIFFUSION ELECTRODE (GDE) WITH A BETTER O2 REDUCTION ELECTROCATALYSTS WITH VERY LOW PT CONTENTS VIA NANO-SIZED PT-COATED NAFION
... deposition, the Pt-Nafion membrane was hot pressed on gas diffusion layer (GDL) to make a gas diffusion electrode. The loading of platinum for GDE1, GDE2 and GDE3 were 0.2, 0.28 and 0.12 mg cm ...
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Effects on the PEMFC Performance by Combination of Gas Distribution Plates and Gas Diffusion Medias
... Rigid Gas Diffusion Media (RGDM, Figure 7) as a gas distributor (polar plate) for reactive gases and applies carbon paper (Toray paper TGPH-090, Figure 8) as diffusion layer, applying a ...
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The Model Development of Gas Diffusion Layer for PEM Fuel Cell
... Based on the range of thickness in Table 1, the values of GDL thickness (t) for the simulation are 130 m, 200, 300, 400, 500, and 600 µm. Figure 6 shows the curve of power against the thickness of GDL at a voltage of 0.7 ...
7
Effect of Cell Potentials on Gas Diffusion Layer Velocity with Serpentine Flow Channel in PEM Fuel Cell
... at gas diffusion layer had an adverse impact on the cell ...at gas diffusion layer inside the cell leads to increases the current density of the entire PEM fuel ...at Gas ...
5
Development Status of Gas Diffusion Coefficient in China
... view, gas diffusion coefficient is not directly measured by the experimental devices, but firstly measures the amount of gas diffusion passes rock samples within a certain time [5] ,then ...
5
Diffusion von Edelgasen in Festkörpern EUR 1729 = Noble gas diffusion in solids EUR 1729
... An Kügelchen der gleichen Herkunft, aber einem Durchmesser von 50μ konnte ein interes santer Effekt beobachtet werden : wird Pulver wie üblich in einer evakuierten Ampulle bestrahlt, so[r] ...
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Determination of the gas diffusion coefficient of a peat grassland soil
... as the Currie apparatus (Figure 1). A hole of the same diameter as the soil core was cut into the stainless steel lids of the 2-litre capacity vessels with a narrow shelf on which the soil core could sit. A septum port ...
8
Investigating the Timing Effect of the Nafion Addition to the Bimetallic (Pd-Pt) Catalyst in Proton-Exchange Membrane Fuel Cell Cathode
... of gas diffusion electrode (GDE) in cathode reaction (Oxygen Reduction Reaction or ORR) of polymer electrolyte membrane fuel cell (PEMFC) compared to commercial Pt/C ...
7
Performance and Aging Study of a Proton Exchange Membrane with Different Materials at Different Temperatures and Humidities
... the gas diffusion layer and the catalytic layer to improve the performance of fuel cells in a high-temperature and low-humidity environment [7-11]; a MEA is prepared by a new technology, and the operation ...
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Analysis of Influence of VOCs Diffusion on the Operation of Liquid Cargo Tank in Multi Berth Anchorage Based on CFD
... of gas diffusion and its influencing factors, it was concluded that there were drift diffusion and momentum diffusion in the process of loading and unloading liquid cargo at ...affecting ...
11
Zeolite Based Air Electrodes for Secondary Batteries
... a gas-diffusion layer (GDL) which ensures the needed oxygen and a bifunctional catalytic layer (CL) where the oxygen reduction/evolution takes place [10, ...its gas permeability and hydrophobicity is ...
7
Nitrogen Gas Generation and Diffusion from Diazo Reproducution Materials
... the and rates estimates to reproduce used time exposure diffusion equation separation diazo speed gas materials for made were for a one -8 second to half density -9 10 and , 1.32 x 10 mo[r] ...
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International Journal of Partial Differential Equations and Applications
... The main advantage of our approach is that it provides a general methodology which outperforms the numerical methods. Also it results in the reduction of the general initial/boundary PDE to a system of ODE which easily ...
5
Processes of Hydrogen Release Relaxation at Thermal Decomposition of Electrodes of Nickel-Cadmium Batteries
... found diffusion coefficients (Table 2) are much less than the diffusion coefficients of free atoms of hydrogen in any metals ...the diffusion coefficients is possible only in the case that the ...
7
The Rate of Solution of Methane and Propane in Hydrocarbon Oils
... of the physical constants; namely, the diffusion constant and the final concentration value, together with other required data such as viscosity of the oils, gas compressibilities, and e[r] ...
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Experimental Analysis on Diffusion of Liquid in To Gas
... In diffusion, we are basically find out the non-availability of diffusivity of volatile ...liquid diffusion applied to analysis, determination of the diffusion coefficient by the using of different ...
5
Diffusion and Adsorption Coefficients of Aromatic Hydrocarbons in Gas Chromatography Capillary Columns
... In this respect, these GC models, based on macroscopic balances, can involve ideal and non-ideal chromatograms with linear and non-linear isotherms. An ideal model defines a thermodynamic reversible mass transfer between ...
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