Influence of anodic gas mixture composition on solid oxide fuel cell performance: Part 2

Murgi, N.; Lorenzo, Giuseppe De; Corigliano, O.; Mirandola, F.; Fragiacomo, P.

doi:10.18280/ijht.34sp0217

Cited by 2 publications

(1 citation statement)

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“…Furthermore, the use of fuels derived from a renewable source, which can feed the SOFC, is particularly interesting. Compared to conventional technologies SOFCs are able to convert various fuels, such as biogas or syngas deriving from biomasses, into electric energy distributed where it can be used with high efficiency. In addition, Solid Oxide Cell can produce alternatively electric energy (Fuel Cell mode) and hydrogen (Electrolytic Cell mode) .…”

Section: Introductionmentioning

confidence: 99%

Electrical and thermal analysis of an intermediate temperature IIR‐SOFC system fed by biogas

Lorenzo

Fragiacomo

2018

Energy Science & Engineering

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The fuel cells are well placed in the panorama of sustainable energy options owing to some of their important characteristics, such as low environmental impact, in terms of both polluting gases emissions and noise pollution, and the high-energy conversion efficiency.Among the different fuel cells according to the type of electrolyte and the operating temperature, the high temperature fuel cells (Solid Oxide Fuel Cells [SOFCs], and Molten Carbonate Fuel Cells [MCFCs]) obtain the highest performance values in terms of energy conversion efficiency [1,2], power density output, stability, useful life, and versatility with regard to the use of fuels. Furthermore, the use of fuels derived from a renewable source, which can feed the SOFC, is particularly interesting. Compared to conventional technologies SOFCs are able to convert various fuels, such as biogas [3][4][5] or syngas [6][7][8] deriving from biomasses, into electric energy distributed where it can be used with high efficiency. In addition, Solid Oxide Cell can produce alternatively electric energy (Fuel Cell mode) and hydrogen (Electrolytic Cell mode) [9].This type of fuel cell has the peculiarity of generating thermal energy, which can be used for cogeneration purposes. Advances in the chemistry and processing of materials are enabling a reduction in the operating temperature of SOFCs in the so-called intermediate temperature region (IT) between 500 and 750°C [10,11].The use of new materials, which work best at intermediate temperature, involves a series of advantages, such as: minor sealing problems, smaller number for Balance of Plant components, simplified thermal management, faster phases of startup and shutdown, and the achievement of a higher thermo-mechanical stability of the fuel cell and a reduced degradation of both the fuel cell and the components of the system that contains it.In recent years there have been a number of theoretical and experimental studies of IT-SOFC energy systems fed by biofuels [12]. The risk associated with the direct use of biofuel (e.g. biogas, bio-alcohols, biodiesel, etc.), which MODELING AND ANALYSIS AbstractAn Intermediate Temperature Solid Oxide Fuel Cells (IT-SOFC) system fed by not conventional fuels such as biogas can produce electric energy with high conversion efficiency and thermal energy. Inside the energy system, the methane in the biogas is mixed with steam, and then it is converted into carbon monoxide, hydrogen and carbon dioxide through steam reforming and water gas shift chemical reactions in an indirect internal reformer (IIR) mostly and in the SOFC anode minimally. The chemical energy of the electro-oxidation of hydrogen and carbon monoxide produced is directly converted into electric energy in the fuel cell anode. A part of the anode exhaust gas can be recirculated at the IIR inlet and the percentage of this recirculated anode exhaust gas together to the fuel utilization factor influence the performances (electric and thermal powers and efficiencies, primary energy saving and first law efficiency) of t...

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Section: Introductionmentioning

confidence: 99%