Power Generation Properties of Microtubular Solid Oxide Fuel Cell Bundle Under Pressurized Conditions

A microtubular solid oxide fuel cell (SOFC) bundle was developed based on a new design. Anode-supported microtubular SOFCs with the cell configuration, La0.6Sr0.4Co0.2Fe0.8O3 (LSCF)-Ce0.9Gd0.1O1.95 (CGO) cathode/CGO electrolyte/Ni-CGO anode were fabricated and bundled in a porous LSCF current-collecting cube with sides of 1 cm. The power generation of the fabricated SOFC bundle was measured under pressurized conditions. Using humidified 30% H2/N2 mixture gas and air, the cubic power density of the bundle at 500°C under atmospheric pressure (0.1 MPa) was 0.47 W cm−3 at 0.4 A cm−2. With increasing operating pressure, the performance increased, and the cubic power density reached 0.66 W cm−3 at 0.6 MPa. The power enhancement brought about by pressurization was due to increased open circuit voltage and reduced polarization resistance. After comparing the power gain of the pressurized SOFC and the power consumption gain of the air compressor used for pressurization, it was found that pressurized cell operation exhibited the highest actual power gain at around 0.3 MPa.

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Power Generation Properties of a Micro Tubular SOFC Bundle Under Pressurized Conditions

ASME 2008 6th International Conference on Fuel Cell Science, Engineering and Technology ◽

10.1115/fuelcell2008-65125 ◽

2008 ◽

Author(s):

S. Hashimoto ◽

Y. Liu ◽

K. Asano ◽

M. Mori ◽

Y. Funahashi ◽

...

Keyword(s):

Power Generation ◽

Power Density ◽

Atmospheric Pressure ◽

Polarization Resistance ◽

Open Circuit Voltage ◽

Open Circuit ◽

Solid Oxide ◽

Operating Pressure ◽

Oxide Fuel ◽

Generation Test

A micro tubular solid oxide fuel cell (SOFC) bundle was developed based on new concept. The anode-supported micro tubular SOFCs with the cell configuration, La0.6Sr0.4Co0.2Fe0.8 O3−δ (LSCF) – Ce0.9Gd0.1O2−δ (CGO) cathode / CGO electrolyte / Ni – CGO anode were fabricated and were bundled by a porous LSCF current collecting cube 1 cm on a side. The power generation test of the fabricated SOFC bundle was carried out under pressurized conditions. Using wet 30%H2 / N2 mixture gas and air, the cubic power density of the bundle at 500°C was 0.47 Wcm−3 at 0.4Acm−2, atmospheric pressure (0.1MPa). With increasing operating pressure, the performance has been improved, and the cubic power density finally reached to 0.66 Wcm−3 at 0.6MPa. Pressurization effect for the power improvement was brought about by the open circuit voltage enhancement and reduction of the polarization resistance.

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Influence of Hydrogen Sulfide in Fuel on Electric Power of Solid Oxide Fuel Cell

Materials Science Forum ◽

10.4028/www.scientific.net/msf.544-545.997 ◽

2007 ◽

Vol 544-545 ◽

pp. 997-1000 ◽

Cited By ~ 4

Author(s):

Minako Nagamori ◽

Yoshihiro Hirata ◽

Soichiro Sameshima

Keyword(s):

Fuel Cell ◽

Solid Oxide Fuel Cell ◽

Electric Power ◽

Power Density ◽

Open Circuit Voltage ◽

Open Circuit ◽

Solid Oxide ◽

Oxide Fuel ◽

Terminal Voltage ◽

Ceria Electrolyte

Terminal voltage, electric power density and overpotential were measured for the solid oxide fuel cell with gadolinium-doped ceria electrolyte (Ce0.8Gd0.2O1.9, GDC), 30 vol% Ni-GDC anode and Pt cathode using a H2 fuel or biogas (CH4 47, CO2 31, H2 19 vol %) at 1073 K. Addition of 1 ppm H2S in the 3vol % H2O-containing H2 fuel gave no change in the open circuit voltage (0.79 - 0.80 V) and the maximum power density (65 - 72 mW/cm2). Furthermore, no reaction between H2S and Ni in the anode was suggested by the thermodynamic calculation. On the other hand, the terminal voltage and electric power density decreased when 1 ppm H2S gas was mixed with the biogas. After the biogas with 1 ppm H2S flowed into the anode for 8 h, the electric power density decreased from 125 to 90 mW/cm2. The reduced electric power density was also recovered by passing 3 vol % H2O-containing H2 fuel for 2 h.

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Combustion-Driven Thermal Transpiration Based Minature SOFC Power Generation Device

Volume 4: Energy Systems Analysis, Thermodynamics and Sustainability; Combustion Science and Engineering; Nanoengineering for Energy, Parts A and B ◽

10.1115/imece2011-62190 ◽

2011 ◽

Author(s):

Pingying Zeng ◽

Kang Wang ◽

Nancy Menapace ◽

Jeongmin Ahn

Keyword(s):

Power Generation ◽

Fuel Cell ◽

Solid Oxide Fuel Cell ◽

Power Density ◽

Catalytic Combustion ◽

Solid Oxide ◽

Oxide Fuel ◽

Power Generator ◽

Thermal Transpiration ◽

Power Generation Device

A miniature pump was designed in this study, based on a catalytic combustion-driven thermal transpiration. The designed pump was further used to build a miniature power generator that has self-pumping and power generation integrated into one device, has no moving parts and operates only on thermal and electrochemical energy supplied by hydrocarbon fuels. A solid oxide fuel cell tested with this power generator obtained a power density of 40 mW.cm−2.

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Size and exergy assessment of solid oxide fuel cell-based H2-fed power generation system with alternative electrolytes: A comparative study

Energy Conversion and Management ◽

10.1016/j.enconman.2020.113681 ◽

2021 ◽

Vol 228 ◽

pp. 113681

Author(s):

Mohsen Sadeghi ◽

Moharram Jafari ◽

Yashar S. Hajimolana ◽

Theo Woudstra ◽

P.V. Aravind

Keyword(s):

Power Generation ◽

Fuel Cell ◽

Comparative Study ◽

Solid Oxide Fuel Cell ◽

Solid Oxide ◽

Oxide Fuel ◽

Generation System ◽

Power Generation System

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Power generation from a symmetric flat-tube solid oxide fuel cell using direct internal dry-reforming of methane

Journal of Power Sources ◽

10.1016/j.jpowsour.2021.230662 ◽

2021 ◽

Vol 516 ◽

pp. 230662

Author(s):

Hua Zhang ◽

Wu Liu ◽

Jianxin Wang ◽

Jun Yang ◽

Yu Chen ◽

...

Keyword(s):

Power Generation ◽

Fuel Cell ◽

Solid Oxide Fuel Cell ◽

Dry Reforming ◽

Solid Oxide ◽

Dry Reforming Of Methane ◽

Oxide Fuel ◽

Flat Tube

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Doped Ceria Based Solid Oxide Fuel Cell Electrolytes and their Sintering Aspects: An Overview

Materials Science Forum ◽

10.4028/www.scientific.net/msf.835.199 ◽

2016 ◽

Vol 835 ◽

pp. 199-236 ◽

Cited By ~ 1

Author(s):

Pradyot Datta

Keyword(s):

Power Generation ◽

Fuel Cell ◽

Solid Oxide Fuel Cell ◽

Operating Temperature ◽

Solid Oxide ◽

Ion Conductivity ◽

Doped Ceria ◽

Oxide Fuel ◽

Oxygen Ion Conductivity ◽

Oxygen Ion

Depletion of fossil fuel at an alarming rate is a major concern of humankind. Consequently, researchers all over the world are putting a concerted effort for finding alternative and renewable energy. Solid oxide fuel cell (SOFC) is one such system. SOFCs are electrochemical devices that have several advantages over conventional power generation systems like high efficiency of power generation, low emission of green house gases and the fuel flexibility. The major research focus of recent times is to reduce the operating temperature of SOFC in the range of 500 to 700 °C so as to render it commercially viable. This reduction in temperature is largely dependent on finding an electrolyte material with adequate oxygen ion conductivity at the intended operating temperature. One much material is Gadolinia doped Ceria (CGO) that shows very good oxygen ion conductivity at the intended operation temperature. The aim of this overview is to highlight the contribution that materials chemistry has made to the development of CGO as an electrolyte.

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