Thermodynamic Analysis of Carbon Deposition and Electrochemical Oxidation of Methane for SOFC Anodes

Koh, J. C. Y.; Kang, B. S.; Lim, Hee Chun; Yoo, Young-Sung

doi:10.1149/1.1339237

Cited by 82 publications

(47 citation statements)

References 15 publications

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“…A comprehensive study by Sasaki and Teraoka (2003b) led to detail boundaries of graphitic carbon deposition for equilibrium temperature ranging from 100°C to 1000°C. Essentially the same approach was reported in several other papers (Koh et al 2001, Sasaki and Teraoka 2003a, Sasaki et al 2004, Kee et al 2008, Aravind et al 2009, Chen et al 2011, Lee et al 2013, Liu et al 2013) using various software codes. Determination of the carbon deposition boundary was based on assumption of a very small but non-zero amount of solid carbon in equilibrium (Koh et al 2002) or a fraction of 10 −6 of the total carbon amount (Sasaki and Teraoka 2003a).…”

Section: Published Models Of Deposition Equilibriummentioning

confidence: 75%

“…Critical compositions of C-H-O mixtures for carbon deposition to occur were usually studied with the help of commercial software based on principles expressed in Equations (1) to (7). Several papers (Bartholomew 1982, Koh et al 2001, Eguchi et al 2002, Koh et al 2002, Sasaki and Teraoka 2003a,b, Sasaki et al 2004, Kee et al 2008, Aravind et al 2009, Chen et al 2011, Lee et al 2013, Liu et al 2013 reported C-H-O equilibrium calculations and their comprehensive presentation in ternary diagrams. Most of the published studies considered only the graphitic form of solid carbon.…”

Section: Temperature Dependence Of Carbon Deposition Equilibriummentioning

confidence: 99%

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On thermodynamic equilibrium of carbon deposition from gaseous C-H-O mixtures: updating for nanotubes

Jaworski

Zakrzewska

Pianko‐Oprych

2017

Reviews in Chemical Engineering

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AbstractExtensive literature information on experimental thermodynamic data and theoretical analysis for depositing carbon in various crystallographic forms is examined, and a new three-phase diagram for carbon is proposed. The published methods of quantitative description of gas-solid carbon equilibrium conditions are critically evaluated for filamentous carbon. The standard chemical potential values are accepted only for purified single-walled and multi-walled carbon nanotubes (CNT). Series of C-H-O ternary diagrams are constructed with plots of boundary lines for carbon deposition either as graphite or nanotubes. The lines are computed for nine temperature levels from 200°C to 1000°C and for the total pressure of 1 bar and 10 bar. The diagram for graphite and 1 bar fully conforms to that in (Sasaki K, Teraoka Y. Equilibria in fuel cell gases II. The C-H-O ternary diagrams. J Electrochem Soc 2003b, 150: A885–A888). Allowing for CNTs in carbon deposition leads to significant lowering of the critical carbon content in the reformates in temperatures from 500°C upward with maximum shifting up the deposition boundary O/C values by about 17% and 28%, respectively, at 1 and 10 bar.

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Section: Published Models Of Deposition Equilibriummentioning

confidence: 75%

Section: Temperature Dependence Of Carbon Deposition Equilibriummentioning

confidence: 99%

On thermodynamic equilibrium of carbon deposition from gaseous C-H-O mixtures: updating for nanotubes

Jaworski

Zakrzewska

Pianko‐Oprych

2017

Reviews in Chemical Engineering

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show abstract

“…129 The propensity for solid carbon formation has also been examined using equilibrium thermodynamic calculations. 35,121,130 Most thermodynamic analyses use thermochemical properties of graphite to represent the carbon phase because these values are readily available. However, assuming graphitic carbon may not be appropriate for predicting the onset of carbon deposition.…”

Section: Effectsmentioning

confidence: 99%

Fundamentals of electro- and thermochemistry in the anode of solid-oxide fuel cells with hydrocarbon and syngas fuels

Hanna

Lee

Shi

et al. 2014

Progress in Energy and Combustion Science

180

110

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“…SOFC can directly utilize hydrocarbon fuels when subjected to pronounced current densities. [ 47 ] The defi nition of "direct hydrocarbon utilization" by electrochemical means, however, is not yet clear. The ambiguity pervades in literature over precisely what should be called direct oxidation, direct conversion, or direct utilization…”

Section: Direct Hydrocarbon Utilizationmentioning

confidence: 99%

Solid Oxide Fuel Cell Anode Materials for Direct Hydrocarbon Utilization

Chan

Liu

et al. 2012

Advanced Energy Materials

278

159

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Solid oxide fuel cells (SOFC) are highly efficient energy conversion devices with the advantage of directly utilizing hydrocarbon fuels. Starting with a short introduction about the fuel challenges and early achievements in this field, this review paper focuses on advances in oxygen‐ion conducting electrolyte‐based SOFC during the last 15 years. Robust anodes immune to carbon deposition are a prerequisite for direct hydrocarbon SOFC. In this paper, direct hydrocarbon SOFC anode materials are classified into three general categories: Ni‐cermet, Cu‐cermet, and oxide‐based anodes. Oxide anodes are further classified in terms of their crystalline structures, namely fluorite, rutile, tungsten bronze, pyrochlore, perovskite, and double perovskite. Achievements and recent advances on these SOFC anodes are reviewed and discussed. The concluding remarks summarize the pros and cons of direct hydrocarbon SOFC anode materials along with the perspective of future research trends.

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Thermodynamic Analysis of Carbon Deposition and Electrochemical Oxidation of Methane for SOFC Anodes

Cited by 82 publications

References 15 publications

On thermodynamic equilibrium of carbon deposition from gaseous C-H-O mixtures: updating for nanotubes

On thermodynamic equilibrium of carbon deposition from gaseous C-H-O mixtures: updating for nanotubes

Fundamentals of electro- and thermochemistry in the anode of solid-oxide fuel cells with hydrocarbon and syngas fuels

Solid Oxide Fuel Cell Anode Materials for Direct Hydrocarbon Utilization

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