Comparison of carbon formation boundary in different modes of solid oxide fuel cells fueled by methane

Sangtongkitcharoen, W.; Assabumrungrat, Suttichai; Pavarajarn, Varong; Laosiripojana, Navadol; Praserthdam, Piyasan

doi:10.1016/j.jpowsour.2004.10.009

Cited by 71 publications

(56 citation statements)

References 13 publications

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“…It is not practical for large power plants. So, a thermodynamic approach is used for the simulations, which was proposed by Larminie and Dicks [5] and is also used in other works [66], [67], [68]. The approach provides, in a first step, for calculation of the chemical equilibrium at the inlet of the anode due to the prevailing conditions -chemical composition, temperature and pressure.…”

Section: Figure 1 Flow Diagram Of the Sofc Stackmentioning

confidence: 99%

Modelling of a solid oxide fuel cell for integrated coal gasification hybrid power plant simulation

Krüger¹

2015

Int. J. Thermo

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Now and in the mid-term future, coal remains an important energy source for electricity generation for reasons of energy supply security and economics. The expectation for low CO2-emissions and high plant efficiencies make solid oxide fuel cells an essential part of numerous innovative power plant concepts. For that reason, simplified and flexible models for solid oxide fuel cells are needed, which can be implemented easily in complex power plant system simulations. A model for a tubular solid oxide fuel cell based on a semi-empirical approach has been developed. The created model is successfully validated with operating data of demonstration plants published in literature. For the target application in a hybrid power plant with high temperature fuel cells, a parametric study of fuel gas composition, operating pressure and temperature, fuel utilization and electrical power density is presented. By means of these, the model of the fuel cell is qualified for implementation in hybrid power plants system models. Additionally, characteristic diagrams obtained by variation of the operating pressure and the fuel utilization are discussed. With the help of the diagrams, the electric and energetic performance of the SOFC over a wide range of these parameters is described by isolines for discrete values of the electrical efficiency and voltage of the fuel cell.

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Section: Figure 1 Flow Diagram Of the Sofc Stackmentioning

confidence: 99%

Modelling of a solid oxide fuel cell for integrated coal gasification hybrid power plant simulation

Krüger¹

2015

Int. J. Thermo

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“…6) Conduction along the PEN is negligible since conduction through the interconnect dominates. 7) Coking is negligible due to the high steam to carbon ratio used in the following analyses [8,9]. 8) The wateregas-shift reaction is assumed to be in equilibrium.…”

Section: Solid Oxide Fuel Cellmentioning

confidence: 99%

“…This highly dynamic case analysis is especially important in a DIR-SOFC hydrogen coproduction system where although the DIR allows high efficiencies and high hydrogen production amounts [3,5] it also results in large thermal gradients within the SOFC. In addition coke formation may occur if high steam to carbon ratios are not dynamically maintained during transient operation [8,9]. Given these issues with DIR operation of SOFCs, it is important to resolve the temperature and species distributions across the SOFC.…”

Section: Introductionmentioning

confidence: 99%

Feasibility of solid oxide fuel cell dynamic hydrogen coproduction to meet building demand

Shaffer

Brouwer

2014

Journal of Power Sources

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h i g h l i g h t sA dynamic internal reforming-solid oxide fuel cell system model is developed. Electricity and hydrogen coproduction to meet dynamic building demand is modeled. The co-producing system well follows the measured building electric load dynamics. Dynamic operation of an SOFC system for co-producing hydrogen is demonstrated. Thermal and tank filling responses to dynamic operation are presented. a r t i c l e i n f o a b s t r a c tA dynamic internal reforming-solid oxide fuel cell system model is developed and used to simulate the coproduction of electricity and hydrogen while meeting the measured dynamic load of a typical southern California commercial building. The simulated direct internal reforming-solid oxide fuel cell (DIR-SOFC) system is controlled to become an electrical load following device that well follows the measured building load data (3-s resolution). The feasibility of the DIR-SOFC system to meet the dynamic building demand while co-producing hydrogen is demonstrated. The resulting thermal responses of the system to the electrical load dynamics as well as those dynamics associated with the filling of a hydrogen collection tank are investigated. The DIR-SOFC system model also allows for resolution of the fuel cell species and temperature distributions during these dynamics since thermal gradients are a concern for DIR-SOFC.

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“…According to this figure, the composition of the biogases is located above the carbon deposition boundary curves, indicating carbon deposition may occur over the anode catalyst. Carbon deposition deactivates the anode catalyst for the electrochemical and chemical reactions in anode and reduces the performance of the SOFC stack gradually [20][21][22][23][24][25]. Therefore, appropriate fuel processing in a biogas-fuelled SOFC system should be considered to prevent this coking problem.…”

Section: Biogas Produced In Wwtpsmentioning

confidence: 99%

Effects of fuel processing methods on industrial scale biogas-fuelled solid oxide fuel cell system for operating in wastewater treatment plants

Farhad

Yoo

Hamdullahpur

2010

Journal of Power Sources

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The performance of three solid oxide fuel cell (SOFC) systems, fuelled by biogas produced through anaerobic digestion (AD) process, for heat and electricity generation in wastewater treatment plants (WWTPs) is studied. Each system has a different fuel processing method to prevent carbon deposition over the anode catalyst under biogas fuelling. Anode gas recirculation (AGR), steam reforming (SR), and partial oxidation (POX) are the methods employed in systems I-III, respectively. A planar SOFC stack used in these systems is based on the anode-supported cells with Ni-YSZ anode, YSZ electrolyte and YSZ-LSM cathode, operated at 800• C. A computer code has been developed for the simulation of the planar SOFC in cell, stack and system levels and applied for the performance prediction of the SOFC systems. The key operational parameters affecting the performance of the SOFC systems are identified. The effect of these parameters on the electrical and CHP efficiencies, the generated electricity and heat, the total exergy destruction, and the number of cells in SOFC stack of the systems are studied. The results show that among the SOFC systems investigated in this study, the AGR and SR fuel processor-based systems with electrical efficiency of 45.1% and 43%, respectively, are suitable to be applied in WWTPs. If the entire biogas produced in a WWTP is used in the AGR or SR fuel processor-based SOFC system, the electricity and heat required to operate the WWTP can be completely self-supplied and the extra electricity generated can be sold to the electrical grid.Crown

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Comparison of carbon formation boundary in different modes of solid oxide fuel cells fueled by methane

Cited by 71 publications

References 13 publications

Modelling of a solid oxide fuel cell for integrated coal gasification hybrid power plant simulation

Modelling of a solid oxide fuel cell for integrated coal gasification hybrid power plant simulation

Feasibility of solid oxide fuel cell dynamic hydrogen coproduction to meet building demand

Effects of fuel processing methods on industrial scale biogas-fuelled solid oxide fuel cell system for operating in wastewater treatment plants

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