Ni-samaria-doped ceria (Ni-SDC) anode-supported solid oxide fuel cell (SOFC) operating with CO

Ideris, Asmida; Croiset, Eric; Pritzker, Mark

doi:10.1016/j.ijhydene.2016.05.203

Cited by 34 publications

(16 citation statements)

References 21 publications

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“…The failure of the cell after 6 operating hours is not very detrimental but is certainly related to the observed accumulation of carbon deposits on the anode/electrolyte interface throughout the cell testing period. This is also revealed by Ideris et al when testing the operation of SOFC based on similar Ni‐SDC anode with CO showing that 7–8 wt.% carbon formation at the anode/electrolyte interface allowed the cell to continue operation without catastrophic failure. Nevertheless, SOFC fed by OMWS crude bio‐oil operation persisted for about 3 h under open circuit conditions at 750 °C (starting from Point G of Figure ) despite the favor of the charring residues accumulation through the porous anodic under these conditions which may be due to the presence of SDC in the anode promoting in the carbon removal instead of conventional YSZ.…”

Section: Resultsmentioning

confidence: 99%

Exploration of Complex Electrochemical and Chemo‐mechanical Behavior of Solid Oxide Fuel Cell Fueled with Pyrolysis Bio‐oil

Elleuch

Halouani

2018

Fuel Cells

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Direct utilization of olive mill wastewater sludge (OMWS) bio‐oil prepared via fast pyrolysis in a Direct‐Biofuel Solid Oxide Fuel Cell (DB‐SOFC) was investigated. A viable power densities (>1,000 W m−2 at 650 °C) and 6 h operation under open circuit conditions were obtained despite crude bio‐oil complex chemistry. When heated, bio‐oil decomposes yielding gases, volatiles and solid residues (biochar). At 650 °C, polarization curve and impedance spectra of SOFC fed by bio‐oil showed peculiar shapes related to complex kinetics and charge transfer mechanism within the anode. The carbon accumulation at 650 °C is managed through oxidations with oxide ions and chemical reaction with CO2 and H2O gases. Above 700 °C, performance degradation was noted related to biochar accumulation at the anode though the promotion of Boudouard reaction, the increase in O2− transfer and possible carbon electrochemical oxidations. The anode chemo‐mechanical instability was observed explaining the rise in cell ohmic resistance and performance degradation after 6 operating hours. Globally, this work demonstrates that direct fed SOFCs with OMWS bio‐oil is achievable using Ni‐SDC anode but enhancement in fuel quality and in anode catalytic activity and stability are required to improve significantly the cell performance.

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Section: Resultsmentioning

confidence: 99%

Exploration of Complex Electrochemical and Chemo‐mechanical Behavior of Solid Oxide Fuel Cell Fueled with Pyrolysis Bio‐oil

Elleuch

Halouani

2018

Fuel Cells

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“…If volume of particles of anode is greater than 1-f c (f c is volume fraction of electrolyte) or smaller than ϕ, the polarization resistance would not depend on thickness of composite. 126 Different fuels used Ni-SDC 500°C 98 Formation of coke 99 Ni-GDC 500°C 100 (1) Formation of coke (2) Degradation in electronic performance 59 Ni-LSGM 550°C Has maximum power density 101 Ni-BZCY7 500°C 102 Smaller OCV value 103 Ni/YSZ cermets <800°C 104 (1) Deposition of carbon (2) Weak electrical performance 6 Ni-GDC 600°C 77 interfere with the performance of SOFC and hence have different effects on electrode polarization resistance, some of the materials are given below in Table 6 with the temperature used to evaluate the electrode polarization.…”

Section: Solid Oxide Fc Anodes Based On Electrode Polarization Resimentioning

confidence: 99%

Material and method selection for efficient solid oxide fuel cell anode: Recent advancements and reviews

et al. 2018

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Summary The energy crisis has reached to an alarming situation due to increase in population. To overcome the shortfall of energy, solid oxide fuel cell (SOFC) being cheap, clean, and efficient renewable energy source is getting attention for electricity generation. Out of the three main components as anode, electrolyte, and cathode; anode/fuel electrode is an important component of SOFC because it allows the flow of electrons via external circuit to cathode generating the electric current and hence requires high electrical conductivity. In this review, anode materials synthesized until now are reviewed and by careful analysis categorized on the basis of operating temperature, conductivity, electrode polarization resistance, and structure. This comparison and categorization will provide selection criteria for state‐of‐the‐art and highly efficient anode materials for SOFC. In addition, the synthesis methods have been reviewed on the basis of their pros and cons, which will further facilitate the researchers to select the best synthesis method so as to get optimized properties of materials.

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“…[31] Moreover, experimental investigation of the role of deposits issued from higher molecular weights hydrocarbons when directly oxidized in fuels cells showed that if the quantity is limited to~1 wt % of the anode, the enhancement of the cell performance was expected implying that the deposits improve the connectivity of the metallic phase in the anode. Results seems promising as the lowest carbon weight ratio depicted from EDX analysis of an SOFC using same Ni-SDC anode material was 6.9 % within the porous layer while a higher carbon weight ratio (33.6 %) was recorded at the anode surface (fuel inlet) when powering the cell with 40 % CO gas.…”

Section: Analysis Of the Sofc Anode Microstructurementioning

confidence: 99%

“…Authors claimed that the SDC in the Ni-SDC anode cermet have promoted carbon removal within the anode and reduce consequently the risk of cell failure due to coking. [31] Moreover, experimental investigation of the role of deposits issued from higher molecular weights hydrocarbons when directly oxidized in fuels cells showed that if the quantity is limited to~1 wt % of the anode, the enhancement of the cell performance was expected implying that the deposits improve the connectivity of the metallic phase in the anode. [35] This is consistent with the structure of the anode materials prepared in this study by a simple printing technique which is likely to be a much less random than cermet prepared through more conventional methods.…”

Section: Analysis Of the Sofc Anode Microstructurementioning

confidence: 99%

Investigation of Direct‐Fed Solid Oxide Fuel Cell Fueled by Upgraded Bio‐Oil Extracted from Olive Waste Pyrolysis: Part 2: Analysis of Electrochemical Behavior and Cell Performance

Elleuch

Halouani

2018

Energy Tech

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In this paper, we propose the first demonstration of the flexibility of operating directly Intermediate Temperature Solid Oxide Fuel Cell (IT‐SOFC) with liquid biofuels for sustainable clean power generation. Biofuel used in this part is prepared through an upgrading process of bio‐oil obtained from olive mill wastewater sludge detailed in part 1 and demonstrated a successful improvement in physicochemical properties. Cell electrochemical polarization behavior, stability and internal decomposition of upgraded bio‐oil over the Ni‐SDC anode at different operating conditions such as temperatures and feed flow rates were deeply investigated. Results showed that IT‐SOFC is able to convert the upgraded bio‐oil to electricity at viable power densities (230 mW cm−2 at 750 °C) which is majorly related to the production of reactive fuels (H2, CO, CH4) from upgraded bio‐oil cracking over Ni‐based catalyst. Several side reactions may also occur over anode. Reverse Boudouard reaction is the main reaction reducing deposits as it forms. Bio‐oil upgrading leads to a promising stability with limited carbon deposits (1.35 wt %) at 750 °C.

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Ni-samaria-doped ceria (Ni-SDC) anode-supported solid oxide fuel cell (SOFC) operating with CO

Cited by 34 publications

References 21 publications

Exploration of Complex Electrochemical and Chemo‐mechanical Behavior of Solid Oxide Fuel Cell Fueled with Pyrolysis Bio‐oil

Exploration of Complex Electrochemical and Chemo‐mechanical Behavior of Solid Oxide Fuel Cell Fueled with Pyrolysis Bio‐oil

Material and method selection for efficient solid oxide fuel cell anode: Recent advancements and reviews

Investigation of Direct‐Fed Solid Oxide Fuel Cell Fueled by Upgraded Bio‐Oil Extracted from Olive Waste Pyrolysis: Part 2: Analysis of Electrochemical Behavior and Cell Performance

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