Biomass reforming process for integrated solid oxide-fuel cell power generation

Vasileiadis, Savvas; Ziaka-Vasileiadou, Zoi

doi:10.1016/j.ces.2004.07.071

Cited by 41 publications

(23 citation statements)

References 11 publications

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“…Small fuel cells systems, \10 kW, have been considered for several applications including microdistributed energy generation and auxiliary power units in aircraft or ships. In this area, solid oxide fuel cells (SOFCs) may enable new companies to enter the power-generation business as heat and electricity providers [2,3]. The most common type of SOFC is composed by cells based on yttrium stabilized zirconia (YSZ) as electrolyte [4] Ni-YSZ as anode [5] and La 0.8 Sr 0.2 MnO 3 (LSM) or La 0.6-Sr 0.4 Fe 0.8 Co 0.2 (LSFCO) as cathode [6,7] operating at temperatures above 700°C using H 2 or syngas (H 2 ?…”

Section: Introductionmentioning

confidence: 99%

Investigation of Ni-based alloy/CGO electro-catalysts as protective layer for a solid oxide fuel cell anode fed with ethanol

et al. 2015

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Ni-based alloys were prepared by using the oxalate method and subsequent in-situ reduction. The crystallographic phase and microstructure of the catalysts were investigated. These bimetallic alloys were mixed with gadolinium-doped ceria in order to obtain a composite material with mixed electronic-ionic conductivity. Catalytic and electrocatalytic properties of the composite materials for the conversion of ethanol were investigated. Electrochemical tests were carried out by utilizing the Nibased alloy/CGO cermet as a barrier layer in a conventional anode-supported solid oxide fuel cell (SOFC). A comparative study between the modified cells and a conventional anode-supported SOFC without the protective layer was made. The aim was to efficiently convert the fuel directly into electricity or syngas (H 2 and CO) just before the conventional anode support. In accordance with the exsitu catalytic tests, the SOFC anode modified with Ni-Co/ CGO showed superior performance towards the direct utilization of dry ethanol than the bare anode and that modified with Ni-Cu/CGO. A peak power of 550 mW cm -2 was achieved with the dry ethanol-fed Ni-Co/CGO pre-layer modified-cell at 800°C. A total low frequency resistance of \0.5 X cm 2 at 0.8 V of cell voltage was recorded in the presence of ethanol directly fed to the SOFC.

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Section: Introductionmentioning

confidence: 99%

Investigation of Ni-based alloy/CGO electro-catalysts as protective layer for a solid oxide fuel cell anode fed with ethanol

et al. 2015

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“…However, the rapid accumulation of coke on the catalyst and coke-induced deactivation are the main drawbacks preventing its application. 8,9 Coke accumulation on the catalyst is the result of carbon formation and carbon removal. Thus, the avoidance of coking requires maximal rates of carbon removal and the minimization of one or more of the processes leading to carbon formation.…”

Section: Introductionmentioning

confidence: 99%

Insight into C + O(OH) reaction for carbon elimination on different types of CoNi(111) surfaces: a DFT study

et al. 2015

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A density-functional theory (DFT) method has been performed to investigate the reaction of C + O(OH) on three types of bimetallic alloy CoNi (111) surface, and the results obtained are compared with those on the pure Ni(111) surface. Our results show that the introduction of Co into the Ni catalyst is beneficial for the adsorption of C, O and OH species, while it weakens the adsorption of CO. Moreover, O(OH) absorbs preferentially on the CoNi(111) surfaces with the surface enrichment of Co compared with the homogeneous CoNi(111) surface; the increased degree of O adsorption energy outweighs the corresponding values of C on the pure Ni (111) and three types of bimetallic alloy CoNi (111) surfaces, indicating that Co has a stronger affinity for oxygen species than for carbon species. On the other hand, the mechanism of the C + O(OH) reaction and the corresponding rate constants at different temperatures show that OH species have a stronger ability to eliminate carbon than O species on Ni (111) and CoNi(111) surfaces; on the CoNi(111) surface, when the Co surface coverage is equal to 1 monolayer (ML), compared to Ni(111), the C + O reaction can be accelerated. When the Co surface coverage is equal to 3/4 ML, the C + OH reaction is the most favorable; further, the rate constant for the C + OH reaction on a CoNi(111) with Co surface coverage of 3/4 ML is much larger than that of the C + O reaction on a CoNi(111) with Co surface coverage of 1 ML. As a result, for carbon elimination on the CoNi alloy surface, OH species should serve as the key species for carbon elimination, and the Co surface coverage of CoNi(111) surface should be kept at 3/4 ML.

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“…Biomass fuels have substantial potential as a carbon neutral renewable energy source that can be used for the production of electricity and heat in combination with solid oxide fuel cells (SOFCs) [1][2][3][4], playing an important role in the mitigation of environmental impacts associated with increasing carbon emission from fossil fuels. The high operating temperatures and fuel flexibility of SOFCs allow the utilization and internal reforming of wide range of hydrocarbon based fuels.…”

Section: Introductionmentioning

confidence: 99%

The impact of steam and current density on carbon formation from biomass gasification tar on Ni/YSZ, and Ni/CGO solid oxide fuel cell anodes

Mermelstein

Millán

Brandon

2010

Journal of Power Sources

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Biomass reforming process for integrated solid oxide-fuel cell power generation

Cited by 41 publications

References 11 publications

Investigation of Ni-based alloy/CGO electro-catalysts as protective layer for a solid oxide fuel cell anode fed with ethanol

Investigation of Ni-based alloy/CGO electro-catalysts as protective layer for a solid oxide fuel cell anode fed with ethanol

Insight into C + O(OH) reaction for carbon elimination on different types of CoNi(111) surfaces: a DFT study

The impact of steam and current density on carbon formation from biomass gasification tar on Ni/YSZ, and Ni/CGO solid oxide fuel cell anodes

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