A high fuel utilizing solid oxide fuel cell cycle with regard to the formation of nickel oxide and power density

Nehter, Pedro

doi:10.1016/j.jpowsour.2006.08.037

Cited by 33 publications

(20 citation statements)

References 3 publications

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“…Formation of nickel oxide (NiO) at the anode represents a well-known degradation mechanism [41,42]. Nickel oxidation can occur chemically, for example due to redox cycling or high fuel utilisation, Ni 0:5 O 2 NiO; (22) or electrochemically, e.g.…”

Section: Nickel Oxidationmentioning

confidence: 99%

Influence of Pressurisation on SOFC Performance and Durability: A Theoretical Study

et al. 2011

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Hybrid power plants consisting of a solid oxide fuel cell (SOFC) and a gas turbine show high electrical efficiencies, however require pressurisation of the SOFC to several bar. This paper presents a theoretical investigation of the pressure influence on SOFC performance and durability. A two‐dimensional elementary kinetic model is used to predict the performance of a single cell in the pressure range of 1–20 bar. The influence of pressure on thermodynamics, reaction kinetics, porous electrode diffusion, channel transport and efficiency is assessed. It was found that polarisation resistance decreases with increasing pressure due to increased diffusion through porous electrodes and a higher electrode surface coverage with reactant species. Furthermore, open‐circuit voltage increases slightly with pressure. As a consequence, power density and efficiency increase upon pressurisation with the strongest increase at low pressures between 1 and 5 bar. The influence of pressure on two typical degradation mechanisms, nickel oxidation and carbon deposition, is assessed using thermodynamic simulations. Pressurisation facilitates nickel oxidation whereas its effect on carbon deposition strongly depends on temperature.

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Section: Nickel Oxidationmentioning

confidence: 99%

Influence of Pressurisation on SOFC Performance and Durability: A Theoretical Study

et al. 2011

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“…(14). This polarization can be estimated by expressing the relative concentration difference of species participating in reaction sites and bulk SOFC flow.…”

Section: Voltage Loss Calculationsmentioning

confidence: 99%

“…If the desulfurizer unit was removed and replaced with a power conversion and controllers, the maximum system efficiency could be reduced to 52% [13]. In the case of SOFC-MGT, it is flexible for several type of fuel and provides the high energy conversion [9,14]. The combination of biomass gasification with SOFC and/or micro gas turbine (MGT) for small-scale CHP was also simulated.…”

Section: Introductionmentioning

confidence: 99%

“…The pressurized SOFC-MGT configuration showed the maximum efficiency of 36%, whereas that from SOFC-MGT was estimated at 23 %. Until now, the thermodynamic analysis of SOFC integrated with biomass gasification system (with various gasification agents) has been limited [14]. Alternatively, the performance of SOFC-DIS system was also investigated.…”

Section: Introductionmentioning

confidence: 99%

“…The overall efficiency of their system is 59.6%. Then novel autothermal type gasifier coupling with SOFC was considered by Panopoulos et al [14]. The hot exhaust in the combustor is directly utilized in the autothermal gasifier.…”

Section: Introductionmentioning

confidence: 99%

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System Efficiency Analysis of SOFC Coupling with Air, Mixed Air-Steam and Steam Gasification Fueled by Thailand Rice Husk

Dokmaingam¹,

Kempegowda²,

Assabumrungrat³

et al. 2017

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Abstract. In this work, integrative biomass gasification with solid oxide fuel cell (SOFC) system using rice husk as feedstock was studied under various operations. It was found that the stand-alone mixed air-steam gasification provided significant higher benefit than alone air and steam gasification. The mathematical model was developed to predict the electrical, thermal and overall efficiency of the system. It was found that the SOFC with steam gasification also provided the greatest overall efficiency of 96%. Hence, the steam gasification is a promising option for coupling with SOFC to generate electricity from biomass.

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CO₂ Capture in SOFC by Vapor Condensation and CH₄ Production in SOEC Storing Excess Electricity

2012

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Simple CO2 capture in combined solid oxide fuel cell (SOFC) gasification or reforming (of hydrocarbons – fossil or biomass) cycles by condensing the water vapor of the anode exhaust gas after CO shifting and H2 recycling by a membrane is simulated. High efficiency of about 60 % is demonstrated. The separated CO2 can be stored in a two‐chamber tank at the same pressure and temperature as methane on the two sides of a flexible membrane which divides the tank into chambers since 1 mol CH4 results in 1 mol CO2. In a solid oxide electrolyzer cell (SOEC), CO2 and steam can be recombined to CH4 using excess electricity, e.g., produced by wind or solar power, and O2 is left over. Thus, excess electricity can be stored chemically. Such a cycle allows hybrid vehicles with SOFC as range extender, running as zero‐emission vehicles also when using natural gas.

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A high fuel utilizing solid oxide fuel cell cycle with regard to the formation of nickel oxide and power density

Cited by 33 publications

References 3 publications

Influence of Pressurisation on SOFC Performance and Durability: A Theoretical Study

Influence of Pressurisation on SOFC Performance and Durability: A Theoretical Study

System Efficiency Analysis of SOFC Coupling with Air, Mixed Air-Steam and Steam Gasification Fueled by Thailand Rice Husk

CO₂ Capture in SOFC by Vapor Condensation and CH₄ Production in SOEC Storing Excess Electricity

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A high fuel utilizing solid oxide fuel cell cycle with regard to the formation of nickel oxide and power density

Cited by 33 publications

References 3 publications

Influence of Pressurisation on SOFC Performance and Durability: A Theoretical Study

Influence of Pressurisation on SOFC Performance and Durability: A Theoretical Study

System Efficiency Analysis of SOFC Coupling with Air, Mixed Air-Steam and Steam Gasification Fueled by Thailand Rice Husk

CO2 Capture in SOFC by Vapor Condensation and CH4 Production in SOEC Storing Excess Electricity

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Product

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CO₂ Capture in SOFC by Vapor Condensation and CH₄ Production in SOEC Storing Excess Electricity