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The effect of gas purging at the cathode on the degradation characteristics of dead-ended proton exchange membrane fuel cells (PEMFCs) is investigated herein using different electrolytes. Electrochemical techniques, including the measurement of polarization curves, cyclic voltammetry (CV) and surface and cross-sectional scanning electron microscopy (SEM) of tested the membrane electrode assemblies...
Gas purging is an effective method to remove the accumulated nitrogen and liquid water during the dead-end operation of polymer electrode membrane fuel cell (PEMFC). The effect of the operation pressure on the degradation characteristic of single cell is investigated under continuous gas purging cycles. Various diagnostic techniques including electrochemical characterization, physicochemical properties,...
This paper presents the work on a PEMFC (proton exchange membrane fuel cell) with DEAC (dead-ended anode and cathode) to achieve high hydrogen and oxygen utilization. Gas purging is an effective way to remove the excess water and maintain normal operation of fuel cell while the voltage drops to the set value chosen arbitrarily due to accumulation of generated water. However, serious carbon corrosion...
In this study, a fixed bed of pulverized coal particles was employed to enhance the precombustion CO2 capture from fuel gas (40 mol% CO2/H2). The performance of the HAHF (hybrid adsorption-hydrate formation) process occurred in the fixed bed was evaluated at different liquid saturations and operation pressures. The experiments were carried out at 274.2 K with the pressure varying from 3.0 MPa to 6...
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