Solid Oxide Fuel Cell–Micro Gas Turbine Hybrid System Using Natural Gas Mixed with Biomass Gasified Fuel

Sucipta, Made; Kimijima, Shinji; Suzuki, Kenjiro

doi:10.1149/1.2825175

Cited by 16 publications

(14 citation statements)

References 22 publications

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“…11-14. 29 These equations have been used in many studies 6,7,10,[29][30][31][32][33] to simulate the ohmic loss for SPGI tubular SOFC systems. In addition, the operating cell voltage predicted by Song et al 29 agrees very well with published SPGI data.…”

Section: Reversible Nernst Voltagementioning

confidence: 99%

“…1 These systems offer highly efficient renewable energy and are modular in nature making them ideal for decentralized combined heat and power ͑CHP͒ applications, and as a result, have recently gained much attention. [2][3][4][5][6][7][8][9][10] Gasification occurs when a controlled amount of oxidant ͑pure oxygen, air, and/or steam͒ is reacted at high temperatures with available carbon in biomass or other carbonaceous material within a gasifier, producing a combustible gas. The combustible gas ͑syngas͒ is composed mainly of hydrogen ͑H 2 ͒, carbon monoxide ͑CO͒, methane ͑CH 4 ͒, carbon dioxide ͑CO 2 ͒, water ͑H 2 O͒, and nitrogen ͑N 2 ͒ as well as small amounts of higher hydrocarbons.…”

mentioning

confidence: 99%

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Simulation of a Tubular Solid Oxide Fuel Cell Stack Operating on Biomass Syn-gas using Aspen Plus

Doherty¹,

Reynolds²,

Kennedy³

2009

ECS Trans.

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A tubular solid oxide fuel cell (SOFC) stack is modelled and its operation on biomass syn-gas is investigated. The objective of this work is to develop a computer simulation model of a biomass gasification-SOFC (BG-SOFC) system capable of predicting performance under various operating conditions and using diverse fuels. The stack is modelled using Aspen Plus and considers ohmic, activation and concentration losses. It is validated against published data for operation on natural gas. Operating parameters such as fuel and air utilisation factor (Uf and Ua), current density (j) and steam to carbon ratio (STCR) are varied and have significant influence. The model is run on wood and miscanthus syn-gas. The results indicate that there must be a trade-off between voltage, efficiency and power with respect to j and the stack should be operated at low STCR and high Uf. High efficiencies are predicted making these systems very promising.

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Section: Reversible Nernst Voltagementioning

confidence: 99%

mentioning

confidence: 99%

Simulation of a Tubular Solid Oxide Fuel Cell Stack Operating on Biomass Syn-gas using Aspen Plus

Doherty¹,

Reynolds²,

Kennedy³

2009

ECS Trans.

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Section: Concentration Lossmentioning

confidence: 99%

mentioning

confidence: 99%

Simulation of a Tubular Solid Oxide Fuel Cell Stack Operating on Biomass Syn-gas using Aspen Plus

Doherty,

Reynolds,

Kennedy

2009

Meet. Abstr.

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A tubular solid oxide fuel cell stack was modeled, and its operation on biomass syngas was investigated. The objective of this work was to develop a computer simulation model of a biomass gasification-solid oxide fuel cell system capable of predicting performance under various operating conditions and using diverse fuels. The stack was modeled using Aspen Plus and considers ohmic, activation, and concentration losses. It was validated against published data for operation on natural gas. Operating parameters such as fuel and air utilization factor ͑U f and U a , respectively͒, current density j, and steam to carbon ratio ͑STCR͒ were varied and had significant influence. The model was run on wood and miscanthus syngas. The results indicated that there must be a trade-off between voltage, efficiency, and power with respect to j and that the stack should be operated at a low STCR and a high U f . Also, the stack should be operated at a U a of ϳ20%. Operation on biomass syngas was compared to natural gas operation and, as expected, performance degraded. Better stack performance was observed for wood syngas compared to miscanthus syngas. High efficiencies were predicted making these systems very promising.

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“…Oxide ion conductors are used in a variety of gas sensors, [1][2][3][4] solid oxide electrochemical cells (SOECs), [5][6][7] and solid oxide fuel cells (SOFCs). [8][9][10][11][12] In those applications, SOFCs are being especially developed as a clean and efficient power source for generating electricity from a variety of fuels. For long lifetimes and efficient operation at 'intermediate temperature (300 -500C)', high oxide ionic conductivity is required for the development of electrolytes.…”

Section: Introductionmentioning

confidence: 99%

Nano-structure design of doped ceria solid electrolytes for intermediate temperature operation of solid oxide fuel cell

Mori

et al. 2010

Trans. Mat. Res. Soc. Japan

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Doped ceria (CeO 2 ) compounds are fluorite related oxides which show oxide ionic conductivity higher than yttria-stabilized zirconia in oxidizing atmosphere. As a consequence of this, considerable interest has been shown in application of these materials for intermediate temperature (300-500C) operation of solid oxide fuel cells (SOFCs). In this review paper, our experimental data was re-introduced to propose a new design paradigm for development of high quality doped CeO 2 electrolytes. Based on our experimental data, our original idea a control of nano-inhomogeity of doped CeO 2 electrolytes was proposed. In our work, the nano-sized powders and dense sintered bodies of M doped CeO 2 (M: Sm, Gd, Y, Yb, Dy, Ho, Tb and La) specimens were fabricated using ammonium carbonate co-precipitation method, conventional sintering method and pulsed electric current sintering method. Also nano-structural features of those specimens were carefully observed for conclusion of relationship between electrolytic properties and microstructure in doped CeO 2 . It is essential that the electrolytic properties of doped CeO 2 reflect in changes of microstructure even down to the atomic scale. Accordingly, a combined approach of ultimate analysis, simulation and processing route design is required to develop the superior quality doped CeO 2 electrolytes for the intermediate temperature operation of SOFCs.

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Solid Oxide Fuel Cell–Micro Gas Turbine Hybrid System Using Natural Gas Mixed with Biomass Gasified Fuel

Cited by 16 publications

References 22 publications

Simulation of a Tubular Solid Oxide Fuel Cell Stack Operating on Biomass Syn-gas using Aspen Plus

Simulation of a Tubular Solid Oxide Fuel Cell Stack Operating on Biomass Syn-gas using Aspen Plus

Simulation of a Tubular Solid Oxide Fuel Cell Stack Operating on Biomass Syn-gas using Aspen Plus

Nano-structure design of doped ceria solid electrolytes for intermediate temperature operation of solid oxide fuel cell

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