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Characterization of a 100 W SOFC stack fed by carbon monoxide rich fuels
No full textThis paper presents the evaluation of the performance of a 100 W Solid Oxide Fuel Cell (SOFC) stack with CO rich fuels as anode gas. The study aims at measuring the Open Circuit Voltage (OCV) and the Area Specific Resistance (ASR) when the amount of CO in the anode flow varies from 0 to 40% in volume. At the same time, the FCTestQA procedures were applied and evaluated as methodology for Solid Oxide Fuel Cell testing. The theoretical OCV was measured considering both H2 and CO oxidation and the water gas shift reaction. The OCV values, as a function of CO concentration, resulted closely related to theoretical ones and the ASR value, calculated for different mixtures of fuel, did not change with anode gas composition and it seemed to be a function of the temperature and the degradation of the materials only
13X Ex-Cu zeolite performance characterization towards H2S removal for biogas use in molten carbonate fuel cells
No full textA 13X zeolite modified with Cu ions (13X Ex-Cu) by means of an innovative technique was employed as adsorbent for H2S removal from biogas, to obtain a desulfurized fuel suitable for molten carbonate fuel cell systems. Sorbent performance was characterized over a wide range of operating conditions typical of biogas mixtures (high H2S content - 200 and 1000 ppmv; CH4 (60%)/CO2 (40%) matrices) and compared to several conventional sorbents. A sensitivity performance analysis was conducted, varying parameters as space velocity, reactor temperature, gas matrix composition and particles size, finalized to identify the optimal conditions for the studied application.
13X Ex-Cu zeolite showed high potentiality for H2S uptake, specifically lowering space velocity, increasing reactor temperature and in presence of high methane concentration in the gas mixture, with adsorption capacity of 40 mg/g under specific and optimized conditions. By means of B.E.T. and XRD analyses, it was demonstrated that the obtained enhanced performance is due to the presence of a large amount of Cu2+ ions, guaranteed by the innovative synthesis procedure, able to realize an efficient physical-chemical adsorption mechanism
Experimental Comparison and Performance Evaluation of Planar Solid Oxide Single Cell
No full textNowadays, in a world characterized by the need to reduce the production of pollutants, by global climate changes, by the progressive lack of availability of cheap fossil fuels, one of the most important goals of scientific research is to design systems that can provide energy with low environmental impact. Planar Solid Oxide Fuel Cells (SOFC) are considered to be power generators with high efficiency independent on size and low emissions. Fuel cell laboratory (FCLab) of University of Perugia has focused his studies on SOFC operating at high temperature (800–1000°C), characterized by greater flexibility in the choice of fuel. This study focuses on definition and realization of experimental test able to define the quality of a SOFC single cell and on the effect of test condition parameter. The performance of the cell is evaluated via polarization curves realized in different external conditions. Area Specific Resistance (ASR) is used as main test output. Results analysis confirm that ASR gives important information on fuel cell performance and can be used to compare an qualify SOFC single cell
Characterization of 100w SOFC stack fed by carbon monoxide rich fuels
No full textThe rapid growth in terms of efficiency and performance of the solid oxide fuel cell (SOFC) technology in recent years has led SOFC to be one of the possible solutions for the exploitation of different types of fuels obtained from fossil or renewable sources.
A lot of processes, such as waste incineration or anaerobic digestion, during operation produce exhaust gases that can be efficiently exploited in SOFC systems. SOFCs, thanks to their operating condition, run with standard fuels such hydrogen and methane as well as fuel waste gas, like biogas or landfill gas, or gas plant, like pyrogas.
The aim of this work is to compare the performance of an 100W stack SOFC when it is fed by different fuel compositions
Sulphur compounds removal from natural gas using porous materials for high temperature fuel cell applications
No full textSOFC Micro-CHP integration in residential buildings
Full text linkSOFC technology has reached many of the performance goals that where indicated by scientific society and is providing several application that permits market penetration. One of the main targets is related to Micro Cogeneration Heat and Power (μ-CHP) for residential application. The integration of this system with a residential house has to be deeply investigated to individuate market targets in terms of costs and efficiency. This study evaluates the Italian market condition and analyzes the integration possibility with both thermal and electrical systems. Different solutions are investigated evaluating thermal and electrical driven logic for μ-CHP SOFC based unit and the opportunity of integration with local electrical grid. Evaluation on heat and electricity storage was also considered as integration strategy. The study is based on electrical and thermal loads in typical residential users and the evaluation is based on Italian technical standards and guidelines. Several operating conditions were evaluated and compared to obtain an optimized size and integration of μHP SOFC based solution
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