Electrochemical oxidation of graphite in an intermediate temperature direct carbon fuel cell based on two-phases electrolyte

Elleuch, Amal; Yu, Jinshuai; Boussetta, Ahlem; Halouani, Kamel; Li, Yongdan

doi:10.1016/j.ijhydene.2012.11.070

Cited by 49 publications

(39 citation statements)

References 29 publications

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“…(8)) as previously explained, CO could mainly be produced from the intra molecular redox reaction between carbon and carbonate (Eq. (12)) specifically from 650 C [6,20,22]. Note that this reaction is experimentally evidenced by the presence of small craters (CO gas bubbles) on the carbon coatings deposited from carbonate dominated baths [27].…”

Section: Olive Wood Charcoal (Ow-c)mentioning

confidence: 93%

“…[6,20,21]. Ceria-doped samarium (SDC) combined with molten carbonate (MC) consisting of Li 2 CO 3 /Na 2 CO 3 eutectic mixture in a mole ratio of 2:1 was used as the electrolyte material.…”

Section: Cell Fabricationmentioning

confidence: 99%

“…This H 2 O hydrogen-bounded to oxygen complexes could probably be assigned to the dehydratation reactions of neighboring carboxylic groups to give carboxyl anhydrides at about 530 C as given by Eq. (6) or/and to the condensation of phenolic groups (Eq. (7)) [25].…”

Section: Olive Wood Charcoal (Ow-c)mentioning

confidence: 99%

“…In order to further elucidate the behavior of OW-C/MC mixture in the deep anode structure of a DCFC, we propose to predict the electrochemical mechanisms on the basis of the TPD results: two possible ionic mediators may be proposed [6,20]: both CO 2À 3 and O 2À ions may be supplied from the composite electrolyte and can be carried into the OW-C/carbonate mixture where the carbon oxidation occurs. If lower amounts of O 2À are supplied, CO 2À 3 ions are probably the main ion carrier in the OW-C/carbonate mixture and directly oxidizes carbon to CO 2 (Eq.…”

Section: Olive Wood Charcoal (Ow-c)mentioning

confidence: 99%

See 3 more Smart Citations

Investigation of chemical and electrochemical reactions mechanisms in a direct carbon fuel cell using olive wood charcoal as sustainable fuel

Elleuch

Halouani

2015

Journal of Power Sources

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Section: Olive Wood Charcoal (Ow-c)mentioning

confidence: 93%

“…[6,20,21]. Ceria-doped samarium (SDC) combined with molten carbonate (MC) consisting of Li 2 CO 3 /Na 2 CO 3 eutectic mixture in a mole ratio of 2:1 was used as the electrolyte material.…”

Section: Cell Fabricationmentioning

confidence: 99%

Section: Olive Wood Charcoal (Ow-c)mentioning

confidence: 99%

Section: Olive Wood Charcoal (Ow-c)mentioning

confidence: 99%

See 2 more Smart Citations

Investigation of chemical and electrochemical reactions mechanisms in a direct carbon fuel cell using olive wood charcoal as sustainable fuel

Elleuch

Halouani

2015

Journal of Power Sources

Self Cite

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“…49carbon/anode/electrolyte interface in this way may result in lower power being generated from the cell due to the small number of available reaction sites when compared to conventional porous SOFC anodes involving gaseous fuels [24].…”

Section: R E T R a C T E D R E T R A C T E D R E T R A C T E D R E T mentioning

confidence: 99%

Progress and Challenges in the Direct Carbon Fuel Cell Technology

Chen

Gao

Long

et al. 2015

ILCPA

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Fuel cells are under development for a range of applications for transport, stationary and portable power appliances. Fuel cell technology has advanced to the stage where commercial field trials for both transport and stationary applications are in progress. Direct Carbon Fuel Cells (DCFC) utilize solid carbon as the fuel and have historically attracted less investment than other types of gas or liquid fed fuel cells. However, volatility in gas and oil commodity prices and the increasing concern about the environmental impact of burning heavy fossil fuels for power generation has led to DCFCs gaining more attention within the global study community. A DCFC converts the chemical energy in solid carbon directly into electricity through its direct electrochemical oxidation. The fuel utilization can be almost 100% as the fuel feed and product gases are distinct phases and thus can be easily separated. This is not the case with other fuel cell types for which the fuel utilization within the cell is typically limited to below 85%. The theoretical efficiency is also high, around 100%. The combination of these two factors, lead to the projected electric efficiency of DCFC approaching 80% -approximately twice the efficiency of current generation coal fired power plants, thus leading to a 50% reduction in greenhouse gas emissions. The amount of CO 2 for storage/sequestration is also halved. Moreover, the exit gas is an almost pure CO 2 stream, requiring little or no gas separation before compression for sequestration. Therefore, the energy and cost penalties to capture the CO 2 will also be significantly less than for other technologies. Furthermore, a variety of abundant fuels such as coal, coke, tar, biomass and organic waste can be used. Despite these advantages, the technology is at an early stage of development requiring solutions to many complex challenges related to materials degradation, fuel delivery, reaction kinetics, stack fabrication and system design, before it can be considered for commercialization. This paper, following a brief introduction to other fuel cells, reviews in detail the current status of the direct carbon fuel cell technology, recent progress, technical challenges and discusses the future of the technology.

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Dual 3D Ceramic Textile Electrodes: Fast Kinetics for Carbon Oxidation Reaction and Oxygen Reduction Reaction in Direct Carbon Fuel Cells at Reduced Temperatures

Bian

Orme

et al. 2020

Adv Funct Materials

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Direct carbon fuel cells (DCFCs) are an efficient energy-conversion technology capable of generating electricity with carbon-dioxide-capture chemistry with solid carbon as fuels. The efficiency and performance of DCFCs depend on the kinetics of the carbon oxidation reactions (COR) and the oxygen reduction reactions (ORR), each occurring at anode and cathode, respectively. The limited active sites paired with reduced temperatures greatly decrease the efficiency of the electrochemical reactions. Ultraporous dual-3D ceramic textiles (dual-3DCT) are integrated into electrolyte-supported DCFCs to enhance charge and mass transfer at the electrodes. Improved COR at the anode is achieved by the synergy between the 3DCT NiO-Ce 0.8 Gd 0.2 O 1.95 (GDC) structure and optimal carbon fuel choice. In a comparative study, DCFCs using graphitic carbon (GC) as fuel show the best COR performance when compared to DCFCs utilizing alternative fuels such as carbon black (CB) and activated carbon (AC). The 3DCT Sm 0.5 Sr 0.5 CoO 3-δ -GDC (SSC-GDC) composite cathode shows electrochemical performance superior to that of the conventional screenprinted SSC-GDC. A peak power density of 392 mW cm −2 at 600 °C is obtained in a DCFC using the 3DCT-anode/electrolyte/3DCT-cathode configuration, an unprecedented value for any reported DCFC as of yet. This points toward promising applications of dual-3DCT electrodes for reduced-temperature DCFCs.

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Electrochemical oxidation of graphite in an intermediate temperature direct carbon fuel cell based on two-phases electrolyte

Cited by 49 publications

References 29 publications

Investigation of chemical and electrochemical reactions mechanisms in a direct carbon fuel cell using olive wood charcoal as sustainable fuel

Investigation of chemical and electrochemical reactions mechanisms in a direct carbon fuel cell using olive wood charcoal as sustainable fuel

Progress and Challenges in the Direct Carbon Fuel Cell Technology

Dual 3D Ceramic Textile Electrodes: Fast Kinetics for Carbon Oxidation Reaction and Oxygen Reduction Reaction in Direct Carbon Fuel Cells at Reduced Temperatures

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