Performance analysis of a tubular solid oxide fuel cell with an indirect internal reformer

Hosseini, S.; Jafarian, Mehdi; Karimi, Gholamreza

doi:10.1002/er.1688

Cited by 6 publications

(9 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Both Hosseini et al [24] and Jafarian et al [25] found that at higher cell operating pressure, the reforming reaction extends to a larger portion of the cell. In turn, Simulation of alternative fuels in an SOFC H. Paradis et al…”

Section: Comparison and Thermodynamic Analysismentioning

confidence: 97%

Simulation of alternative fuels for potential utilization in solid oxide fuel cells

Paradis

Andersson

Yuan

et al. 2011

Int. J. Energy Res.

View full text Add to dashboard Cite

SUMMARYFuel cells are promising with advantages of higher energy conversion efficiency and lower emissions of SO X , NO X , and CO 2 than conventional power systems. Solid oxide fuel cell (SOFC) is a high temperature fuel cell, which operates at 873-1273 K. This allows SOFCs to operate with different types of fuels from both fossil and renewable sources because of their general higher tolerance to contaminants than other fuel cells. It opens up for an easier transition from conventional power generation of hydrocarbon-based fuels to hydrogen energy by fuel cells. With increased interest in the use of renewable fuels, fuel cells have the potential to play a significant role in a sustainable solution. Attractive fuels, which are reviewed here and analyzed through thermodynamic calculations in this study, are methanol, ethanol, di-methyl-ether, and biogas. It is concluded that it is feasible for SOFCs to handle all the studied fuels.Further, a CFD model of an anode-supported SOFC is simulated with biogas as fuel. An analysis of the fuels is conducted at 1000 K, in terms of the heat required for each mole H 2 converted. It shows that methane uses twice as much heat as methanol and di-methyl-ether do, and if efficiently distributed where needed, it can work as a possible performance enhancement. A composed table of comparable studies in the literature of different alternative fuels is provided. The case study of an anode-supported SOFC fueled with biogas of varying amount of methane and steam-to-fuel ratio revealed that biogas needs a high inlet temperature to enable the reforming and keep a constant current density distribution.

show abstract

Section: Comparison and Thermodynamic Analysismentioning

confidence: 97%

Simulation of alternative fuels for potential utilization in solid oxide fuel cells

Paradis

Andersson

Yuan

et al. 2011

Int. J. Energy Res.

View full text Add to dashboard Cite

show abstract

“…where

V_{{normalN, normalH}_{2} false/ O_{2}}

and

V_{{N, CO / O}_{2}}

are the Nernst voltages produced by the chemical reactions and , respectively;

Δ V_{act, a, CO}

Δ V_{{normalact, normala, normalH}_{2}}

and

Δ V_{{normalact, normalca, normalO}_{2}}

are the activation voltage losses in the anode and at the cathode. In this article, the SOFC in cogenerative arrangement is considered to operate in the low to medium current density region, where the concentration voltage losses are expected to be limited in order to extend its working life. Therefore, in equation the concentration voltage losses in the anode and the cathode are neglected.…”

Section: Energy Analysis Of Cogenerative Plantmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…In the numerical modeling field of SOFC systems fed by biogas, there are some articles in the literature [21][22][23][24][25]. In all these articles [21][22][23][24][25][26] SOFCs operate at high temperature. In some of these articles the performance of SOFC systems with steam and/or dry reformer reactors external to the anode with ER mode [21,24] and of an SOFC-gas turbine system with a steam and DR chemical processes inside the SOFC anode [23] were evaluated.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electrical and thermal analysis of an intermediate temperature IIR‐SOFC system fed by biogas

Lorenzo

Fragiacomo

2018

Energy Science & Engineering

View full text Add to dashboard Cite

The fuel cells are well placed in the panorama of sustainable energy options owing to some of their important characteristics, such as low environmental impact, in terms of both polluting gases emissions and noise pollution, and the high-energy conversion efficiency.Among the different fuel cells according to the type of electrolyte and the operating temperature, the high temperature fuel cells (Solid Oxide Fuel Cells [SOFCs], and Molten Carbonate Fuel Cells [MCFCs]) obtain the highest performance values in terms of energy conversion efficiency [1,2], power density output, stability, useful life, and versatility with regard to the use of fuels. Furthermore, the use of fuels derived from a renewable source, which can feed the SOFC, is particularly interesting. Compared to conventional technologies SOFCs are able to convert various fuels, such as biogas [3][4][5] or syngas [6][7][8] deriving from biomasses, into electric energy distributed where it can be used with high efficiency. In addition, Solid Oxide Cell can produce alternatively electric energy (Fuel Cell mode) and hydrogen (Electrolytic Cell mode) [9].This type of fuel cell has the peculiarity of generating thermal energy, which can be used for cogeneration purposes. Advances in the chemistry and processing of materials are enabling a reduction in the operating temperature of SOFCs in the so-called intermediate temperature region (IT) between 500 and 750°C [10,11].The use of new materials, which work best at intermediate temperature, involves a series of advantages, such as: minor sealing problems, smaller number for Balance of Plant components, simplified thermal management, faster phases of startup and shutdown, and the achievement of a higher thermo-mechanical stability of the fuel cell and a reduced degradation of both the fuel cell and the components of the system that contains it.In recent years there have been a number of theoretical and experimental studies of IT-SOFC energy systems fed by biofuels [12]. The risk associated with the direct use of biofuel (e.g. biogas, bio-alcohols, biodiesel, etc.), which MODELING AND ANALYSIS AbstractAn Intermediate Temperature Solid Oxide Fuel Cells (IT-SOFC) system fed by not conventional fuels such as biogas can produce electric energy with high conversion efficiency and thermal energy. Inside the energy system, the methane in the biogas is mixed with steam, and then it is converted into carbon monoxide, hydrogen and carbon dioxide through steam reforming and water gas shift chemical reactions in an indirect internal reformer (IIR) mostly and in the SOFC anode minimally. The chemical energy of the electro-oxidation of hydrogen and carbon monoxide produced is directly converted into electric energy in the fuel cell anode. A part of the anode exhaust gas can be recirculated at the IIR inlet and the percentage of this recirculated anode exhaust gas together to the fuel utilization factor influence the performances (electric and thermal powers and efficiencies, primary energy saving and first law efficiency) of t...

show abstract

“…Similarly, a 2-D steady-state mathematical model of a tubular SOFC with indirect internal reforming (IIR-SOFC) was developed by Hosseini et al [17] to examine the chemical and electrochemical processes and the effect of different operating parameters on the cell performance. Similarly, a 2-D steady-state mathematical model of a tubular SOFC with indirect internal reforming (IIR-SOFC) was developed by Hosseini et al [17] to examine the chemical and electrochemical processes and the effect of different operating parameters on the cell performance.…”

Section: Introductionmentioning

confidence: 99%

Simulation of an atmospheric SOFC and gas turbine hybrid system using Aspen Plus software

Ameri

Mohammadi

2011

Int. J. Energy Res.

View full text Add to dashboard Cite

SUMMARY Fuel cell is an energy conversion device that transforms the chemical energy of a fuel gas directly into electrical energy without direct combustion as an intermediate step. One type of fuel cell is the solid oxide fuel cell (SOFC) with the operation temperature of around 1273°K. The high operating temperature of the SOFC also provides excellent possibilities for feeding into a gas turbine (GT) to generate additional electricity. In this paper, an atmospheric SOFC and GT hybrid system have been simulated by application of Aspen Plus existing functions and unit operation modules. The study has shown that the system efficiency and voltage reduce continuously as the current density increases due to increase of Ohmic and concentration losses. However, the output power increases due to enhancement of the current density. Therefore, the system should operate at low current density if the goal is to generate power at higher efficiency. Moreover, if the goal is to produce more power, the system should operate at high current density. The simulation results indicate that the cycle can achieve high electrical generation efficiency (68.2%), which is very attractive compared to the ideal efficiency of combined cycle power plants around 50%. Moreover, a parametric analysis has been performed to assess the effects of the several operating condition variation on the system performance. Copyright © 2011 John Wiley & Sons, Ltd.

show abstract

Performance analysis of a tubular solid oxide fuel cell with an indirect internal reformer

Cited by 6 publications

References 22 publications

Simulation of alternative fuels for potential utilization in solid oxide fuel cells

Simulation of alternative fuels for potential utilization in solid oxide fuel cells

Electrical and thermal analysis of an intermediate temperature IIR‐SOFC system fed by biogas

Simulation of an atmospheric SOFC and gas turbine hybrid system using Aspen Plus software

Contact Info

Product

Resources

About