Development of Anode Gas Recycle System Using Ejector for 1 kW Solid Oxide Fuel Cell

2014 ◽  
Vol 137 (2) ◽  
Author(s):  
Soumei Baba ◽  
Nariyoshi Kobayashi ◽  
Sanyo Takahashi ◽  
Satoshi Hirano
Keyword(s):  
Solid Oxide Fuel Cells ◽  
Steam Reforming ◽  
Feed Rate ◽  
Electrochemical Reaction ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Gas Composition ◽  
Fuel Utilization ◽  
Quadrupole Mass ◽  
Improved Performance

An anode gas recycle (AGR) system using an ejector for 1 kW solid oxide fuel cells (SOFCs) was developed to increase the electrical efficiency of combined power generation. We call this an AGR–SOFC. The effects of recirculation ratio, externally steam feed rate, and fuel utilization were determined experimentally on the AGR–SOFC performance (i.e., output power, stack temperature, and gas composition) using a variable flow ejector and a recirculation ratio of 0.55–0.62, overall fuel utilization of 0.720–84, and steam feed rate of 0–1.5 g/min. A quadrupole mass spectrometer was used to identify the recirculation ratio, the gas composition of reformed gas at the AGR–SOFC inlet, and that of the recycle gas at the outlet. Compared to one-path SOFC systems, i.e., without an AGR, the AGR–SOFC was stable and generated about 15 W more electricity when the overall fuel utilization was 0.84 and the recirculation ratio was 0.622 with no steam supply. This improved performance was due to the reduced H2O concentration in the anodic gas. In addition, although the recirculation ratio did not affect the AGR–SOFC performance, a high recirculation ratio can provide steam produced via the electrochemical reaction to the injected fuel for the steam reforming process.

Development of Anode Gas Recycle System Using Ejector for 1 KW Solid Oxide Fuel Cell

2014 ◽  
Author(s):  
Soumei Baba ◽  
Nariyoshi Kobayashi ◽  
Sanyo Takahashi ◽  
Satoshi Hirano
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide Fuel Cell ◽  
Feed Rate ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Gas Composition ◽  
Fuel Utilization ◽  
Sofc Anode ◽  
Improved Performance

An anode gas recycle system using an ejector for 1 kW solid oxide fuel cells (SOFCs) was developed to increase the electrical efficiency of combined power generation. We call this an AGR-SOFC (anode gas recycle-solid oxide fuel cell). The effects of recirculation ratio, externally steam feed rate, and fuel utilization were determined experimentally on the AGR-SOFC performance (i.e., output power, stack temperature and gas composition) using a variable flow ejector and a recirculation ratio of 0.55–0.62, overall fuel utilization of 0.72–0.84, and steam feed rate of 0–1.5 g/min. A quadrupole mass spectrometer was used to identify the recirculation ratio, the gas composition of reformed gas at the AGR-SOFC inlet, and that of the recycle gas at the outlet. Compared to one-path SOFC systems i.e. without an anode gas recycle, the AGR-SOFC was stable and generated about 15 W more electricity when the overall fuel utilization was 0.84 and the recirculation ratio was 0.622 with no steam supply. This improved performance was due to the reduced H2O concentration in the anodic gas. In addition, although the recirculation ratio did not affect the AGR-SOFC performance, a high recirculation ratio can provide steam produced via the electrochemical reaction to the injected fuel for the steam reforming process.

scholarly journals Methane steam reforming reaction in solid oxide fuel cells: Influence of electrochemical reaction and anode thickness

2021 ◽  
Vol 507 ◽  
pp. 230276
Author(s):  
Liyuan Fan ◽  
Anatoli Mokhov ◽  
S. Ali Saadabadi ◽  
Nigel Brandon ◽  
Purushothaman Vellayani Aravind
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Steam Reforming ◽  
Electrochemical Reaction ◽  
Solid Oxide ◽  
Methane Steam Reforming ◽  
Oxide Fuel ◽  
Methane Steam

Design of Anodes for IT SOFC: Effect of Complex Oxide Promoters and Pd on Activity and Stability in Methane Steam Reforming of Ni/YSZ (ScSZ) Cermets

2006 ◽  
Vol 972 ◽  
Author(s):  
Vladislav A Sadykov ◽  
Natalia V Mezentseva ◽  
Rimma v Bunina ◽  
Galina M Alikina ◽  
Anton I Lukashevich ◽  
...  
Keyword(s):  
Solid Oxide Fuel Cells ◽  
Steam Reforming ◽  
Complex Oxide ◽  
Solid Oxide ◽  
Coke Deposition ◽  
Methane Steam Reforming ◽  
Oxide Fuel ◽  
Oxygen Mobility ◽  
Methane Steam ◽  
Spatial Uniformity

AbstractEffect of fluorite-like or perovskite-like complex oxide promoters and Pd on the performance of Ni/YSZ and Ni/ScSZ cermets in methane steam reforming or selective oxidation by O2 into syngas at short contact times was studied. Spatial uniformity of dopants distribution in composites was controlled by TEM combined with EDX, while the lattice oxygen mobility and reactivity was elucidated by CH4 and H2 TPR. Oxide promoters allow to operate even at stoichiometric H2O/CH4 ratio by suppressing coke deposition through modification of Ni surface, while doping by Pd ensures reasonable performance at moderate (∼550 °C) temperatures required for Intermediate–Temperature Solid Oxide Fuel Cells (IT SOFC).

Triggering interfacial activity of traditional La0.5Sr0.5MnO3 cathode with Co-doping for proton-conducting solid oxide fuel cells

2022 ◽  
Author(s):  
Yanru Yin ◽  
shoufu yu ◽  
Hailu Dai ◽  
Lei Bi
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Proton Conducting ◽  
Interfacial Activity ◽  
Co Doping ◽  
New Material ◽  
Improved Performance

Doping La0.5Sr0.5MnO3-δ (LSM) cathode with the Co element allows the new material La0.5Sr0.5Mn0.9Co0.1O3-δ (LSMCo) to show improved performance compared with the Co-free LSM for proton-conducting solid oxide fuel cells (H-SOFCs),...

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