Thermodynamic analysis of a solid oxide fuel cell system fuelled by ethanol

Tsiakaras, Panagiotis; Demin, A.

doi:10.1016/s0378-7753(01)00803-5

Cited by 101 publications

(61 citation statements)

References 9 publications

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“…It was commonly assumed that the carbon activity equals 1 at the thermodynamic equilibrium, and solid carbon formation is possible only when a[C k (s)] ,21 > 1 ( Assabumrungrat et al 2004, Tsiakaras andDemin 2001). That analysis was also extended by considering carbon activities resulting from other reactions …”

Section: Published Models Of Deposition Equilibriummentioning

confidence: 99%

On thermodynamic equilibrium of carbon deposition from gaseous C-H-O mixtures: updating for nanotubes

Jaworski

Zakrzewska

Pianko‐Oprych

2017

Reviews in Chemical Engineering

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AbstractExtensive literature information on experimental thermodynamic data and theoretical analysis for depositing carbon in various crystallographic forms is examined, and a new three-phase diagram for carbon is proposed. The published methods of quantitative description of gas-solid carbon equilibrium conditions are critically evaluated for filamentous carbon. The standard chemical potential values are accepted only for purified single-walled and multi-walled carbon nanotubes (CNT). Series of C-H-O ternary diagrams are constructed with plots of boundary lines for carbon deposition either as graphite or nanotubes. The lines are computed for nine temperature levels from 200°C to 1000°C and for the total pressure of 1 bar and 10 bar. The diagram for graphite and 1 bar fully conforms to that in (Sasaki K, Teraoka Y. Equilibria in fuel cell gases II. The C-H-O ternary diagrams. J Electrochem Soc 2003b, 150: A885–A888). Allowing for CNTs in carbon deposition leads to significant lowering of the critical carbon content in the reformates in temperatures from 500°C upward with maximum shifting up the deposition boundary O/C values by about 17% and 28%, respectively, at 1 and 10 bar.

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Section: Published Models Of Deposition Equilibriummentioning

confidence: 99%

On thermodynamic equilibrium of carbon deposition from gaseous C-H-O mixtures: updating for nanotubes

Jaworski

Zakrzewska

Pianko‐Oprych

2017

Reviews in Chemical Engineering

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“…Ethanol is considered as a valuable candidate fuel for SOFC application [1]. It offers many advantages: 1) Being a liquid, it has a high energetic density, it is easy to store, handle and transport; 2) As ethanol contains oxygen and is perfectly miscible with water, it can easily be reformed by steam without additional fuel processing; 3) ethanol is widely available and can be produced from renewable sources (agricultural byproducts, biomass) allowing for CO 2 -neutral power generation.…”

Section: Introductionmentioning

confidence: 99%

Ethanol internal steam reforming in intermediate temperature solid oxide fuel cell

Diethelm¹,

herle²

2011

Journal of Power Sources

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This study investigates the performance of a standard Ni-YSZ anode supported cell under ethanol steam reforming operating conditions. Therefore, the fuel cell was directly operated with a steam/ethanol mixture (3 to 1 molar). Other gas mixtures were also used for comparison to check the conversion of ethanol and of reformate gases (H 2 , CO) in the fuel cell. The electrochemical properties of the fuel cell fed with 4 different fuel compositions were characterized between 710 and 860°C by I-V and EIS measurements at OCV and under polarization. In order to elucidate the limiting processes, impedance spectra obtained with different gas compositions were compared using the derivative of the real part of the impedance with respect of the natural logarithm of the frequency.Results show that internal steam reforming of ethanol takes place significantly on Ni-YSZ anode only above 760°C. Comparisons of results obtained with reformate gas showed that the electrochemical cell performance is dominated by the conversion of hydrogen. The conversion of CO also occurs either directly or indirectly through the water-gas shift reaction but has a significant impact on the electrochemical performance only above 760°C.

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“…Hence, ethanol can be considered as an economically viable alternative green power source, which results in low pollutant emissions and controlled combustion (Tsiakarasa and Demin, 2001). In addition, relatively lower temperatures are required for a thermodynamically favorable reaction, where DRE is thermodynamically favorable above 318°C, compared to DRM (above 642°C) (Puolakka and Krause, 2007).…”

Section: Co 2 (Dry) Reforming Of Ethanolmentioning

confidence: 99%

CO2 as an Oxidant for High-Temperature Reactions

Kawi

Kathiraser

2015

Front. Energy Res.

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This paper presents a review on the developments in catalyst technology for the reactions utilizing CO 2 for high-temperature applications. These include dehydrogenation of alkanes to olefins, the dehydrogenation of ethylbenzene to styrene, and finally CO 2 reforming of hydrocarbon feedstock (i.e., methane) and alcohols. Aspects on the various reaction pathways are also highlighted. The literature on the role of promoters and catalyst development is critically evaluated. Most of the reactions discussed in this review are exploited in industries and related to on-going processes, thus providing extensive data from literature. However, some reactions, such as CO 2 reforming of ethanol and glycerol, which have not reached industrial scale, are also reviewed owing to their great potential in terms of sustainability, which is essential as energy for the future. This review further illustrates the building-up of knowledge that shows the role of support and catalysts for each reaction and the underlying linkage between certain catalysts, which can be adapted for the multiple CO 2 -related reactions.

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Thermodynamic analysis of a solid oxide fuel cell system fuelled by ethanol

Cited by 101 publications

References 9 publications

On thermodynamic equilibrium of carbon deposition from gaseous C-H-O mixtures: updating for nanotubes

On thermodynamic equilibrium of carbon deposition from gaseous C-H-O mixtures: updating for nanotubes

Ethanol internal steam reforming in intermediate temperature solid oxide fuel cell

CO2 as an Oxidant for High-Temperature Reactions

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