Performance and environmental study of a biogas-fuelled solid oxide fuel cell with different reforming approaches

Chatrattanawet, Narissara; Saebea, Dang; Authayanun, Suthida; Arpornwichanop, Amornchai; Patcharavorachot, Yaneeporn

doi:10.1016/j.energy.2017.06.125

Cited by 44 publications

(14 citation statements)

References 20 publications

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“…T is the temperature in Kelvin (K), p is the pressure in bar (1 bar = 10 5 Pa), M i/j is the molar mass (g mol −1 ) of gas species in the binary mixture, and V i/j is the diffusion volume in cm 3 . Detailed values of M i and V i can be found in one of our previous papers [15].…”

Section: Conservation Of Speciesmentioning

confidence: 99%

“…The η of chemical to electrical energy is usually higher compared to the gas turbines or engines with internal combustion, which are limited by the Carnot cycle [2]. SOFCs can be fueled with some other hydrocarbon gases (e.g., methane) that need to be reformed externally in a reformer [3] or internally within the cell [3,4]. When the cell is fueled with hydrocarbon gas, the exhaust gas also contains carbon dioxide (CO 2 ).…”

Section: Introductionmentioning

confidence: 99%

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A Model of Solid Oxide Fuel Cell Degradation on a Microstructural Level

Nerat

2020

Applied Sciences

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The growth of nickel (Ni) particles in the porous anode is one of the most critical issues in solid oxide fuel cells (SOFC). It reduces the density of triple-phase boundaries (TPBs) over time and increases the polarization resistance of SOFC. Most of the three-dimensional models that are used to simulate this phenomenon in detail are numerically exhausting and as such intractable for on-line applications. This work presents a two-dimensional, microstructural model of reduced complexity as a trade-off between the numerical load and the level of detail. The model of Ni agglomeration is based on the power-law coarsening theory. The resulting model was validated by comparing the relative density of TPBs and the cell voltage to the experimentally measured values. It was shown that the calculated values closely fit the measured data. The advantage of the proposed model is that it takes lower computational load during the simulation compared to the complex phase field models and is suitable for estimation of SOFC electric performance over time.

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Section: Conservation Of Speciesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Model of Solid Oxide Fuel Cell Degradation on a Microstructural Level

Nerat

2020

Applied Sciences

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“…It was concluded that, considering the SOFC's performance as the criterion, lower temperatures for CO 2 dry reforming are acceptable. Biogas‐fed SOFC systems with internal and external reforming processes were studied by Chatrattanawet et al 21 Their results indicated that a better performance could be achieved for the SOFC with internal reforming. A similar work was conducted by Chitsaz et al 22 , who concluded that for the optimal condition, the exergy efficiency of the system with internal reforming was about 9.6% higher than for the system with external reforming.…”

Section: Introductionmentioning

confidence: 99%

Thermoeconomic analysis and multi‐objective optimization of a solid‐oxide fuel cell plant coupled with methane tri‐reforming: Effects of thermochemical recuperation

et al. 2021

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Summary An 80‐kW solid‐oxide fuel cell (SOFC)‐based power plant coupled with methane tri‐reforming is proposed and analyzed from the viewpoint of thermoeconomics. In order to integrate the SOFC power generation section with the external reformer, part of the exhaust gases from the afterburner is recycled and utilized as a reformer agent in the reactor. The main challenge in performing the economic analysis is the determination of the costs associated with the tri‐reforming process, in particular the reactor cost. To accomplish this, a mathematical procedure is suggested and applied for a fixed‐bed reactor based on both the chemical equilibrium and chemical kinetics describing the tri‐reforming process. The effects on system performance of important design parameters, including current density, SOFC operating temperature, and exhaust gas recirculation (EGR) percentage, are investigated. The results indicate that system performance is enhanced by using lower values of current density and higher values of SOFC operating temperature. In addition, considering the thermal and environmental performance of system as criteria, the use of EGR is not recommended. However, as the EGR percentage increases, the product unit cost decreases, making EGR advantageous from an economic perspective.

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“…Biogas is a gas produced by the anaerobic decomposition of organic matter (in the absence of oxygen) under suitable conditions of temperature, pressure, and humidity [4], [5]. Biogas consists of methane gas (CH4) and carbon dioxide (CO2) and also contains hydrogen sulfide (H2S), nitrogen (N2), water (H2O), and ammonia (NH3) in smaller proportions in its composition [6], [7].…”

Section: Introductionmentioning

confidence: 99%

Mathematical modeling of a solid oxide fuel cell operating on biogas

2021

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Solid oxide fuel cells (SOFC) are the most efficient devices for directly converting the chemical energy of a fuel into electrical energy. This is one of the main reasons why these fuel cells have received a lot of attention from the scientific community and from several developers who have invested in the use of this technology in various applications. Biogas is one of the products of anaerobic decomposition (absence of gaseous oxygen) of organic matter, which occurs due to the action of certain types of bacteria. Biogas is mainly composed of methane (CH4) and carbon dioxide (CO2) and its use in solid oxide fuel cells has been investigated since Biogas is a renewable biofuel. The aim of this paper was to perform mathematical modeling of a solid oxide fuel cell operating on biogas. The results confirmed that the overall efficiency of the system is above 94% and the largest irreversibilities of the system are related to heat exchangers.

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Performance and environmental study of a biogas-fuelled solid oxide fuel cell with different reforming approaches

Cited by 44 publications

References 20 publications

A Model of Solid Oxide Fuel Cell Degradation on a Microstructural Level

A Model of Solid Oxide Fuel Cell Degradation on a Microstructural Level

Thermoeconomic analysis and multi‐objective optimization of a solid‐oxide fuel cell plant coupled with methane tri‐reforming: Effects of thermochemical recuperation

Mathematical modeling of a solid oxide fuel cell operating on biogas

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