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This paper presents the experimental results of the investigation of mechanical damage in Solid Oxide Fuel Cell (SOFC) under fuel starvation conditions using in-situ Acoustic Emission (AE) and electrochemical technique. The cell was oxidized electrochemically and AE signal has begun to be detected when the oxidation spread from anode/electrolyte interface to anode substrate after Ni/NiO equilibrium...
Cyclic treatment technique (redox cycling) comprising stages of material exposition in reducing and oxidizing high temperature environments and intermediate degassing between these stages has been developed to improve the structural integrity of YSZ-NiO ceramic anode substrates for solid oxide fuel cells. Series of specimens were singly reduced in hydrogenous environment (the Ar-5 vol.%H2 mixture...
Among the most considered future alternative energy conversion systems are fuel cells. A fuel cell is an electrochemical device that continuously and directly converts chemical energy to electricity with the most common technologies to be the Polymer Electrolyte Membrane Fuel Cells (PEMFC) and the Solid Oxide Fuel Cells (SOFC). In such devices hydrogen is considered as the preferred fuel in virtue...
In this paper, a brief description about the development of micro polymer electrolyte fuel cell (PEFC) was presented. PEFCs were divided into two different types: micro proton exchange membrane fuel cell, which used hydrogen as fuel, and micro direct methanol fuel cell, which used liquid methanol as fuel. To compete with the advanced batteries technology, the miniaturization of the fuel supply system...
Lead dioxide catalyzed cathode (PbO2) which has high overpotential and electrode potential with low cost was tested in microbial fuel cells (MFCs) for sulfide removal in this study, compared with traditional platinum based carbon cathode (Pt/C). The maximum power density of 997.26±20.20 mW/m2 was realized, with sulfide removal efficiency as high as 88.73±4.37%, both showing advantage to Pt/C cathode...
Direct methanol fuel cell (DMFC) is recognized as a promising next generation power source for portable electronic devices for its high energy density. The work in DMFC system modelling is important to provide performance prediction and leads to design optimization. So far there are mainly two approaches in DMFC modelling work, namely to derive through full CFD (computable fluidic dynamics) and to...
This work presents nonlinear observer designs for the catalytic partial oxidation (CPO) and the water gas shift (WGS) reactors in fuel cell power systems. The observers make use of available temperature and total pressure measurements and estimate the mole fractions of each species in the reactors. Estimation of H/sub 2/ and CO fractions is particularly useful for monitoring and control of the fuel...
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