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Entropy
Volume 27
Issue 2
10.3390/e27020101
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Article

Novel Method for Determining Standard Enthalpy and Entropy of Volatilisation of Chromia Exposed to Humidified Oxygen at 298 K Based on Transport Theory of Multicomponent Gas Mixtures

by
Thammaporn Thublaor
1,
Watcharapon Tengprasert
1,
Grid Suparapinyopapkul
1,
Thanasak Nilsonthi
1,
Walairat Chandra-ambhorn
2 and
Somrerk Chandra-ambhorn
1,*
1
High Temperature Corrosion Research Centre, Department of Materials and Production Technology Engineering, Faculty of Engineering, King Mongkut’s University of Technology North Bangkok, 1518, Pracharat 1 Road, Bangsue, Bangkok 10800, Thailand
2
Department of Chemical Engineering, School of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Chalongkrung 1 Road, Lat Krabang, Bangkok 10520, Thailand
*
Author to whom correspondence should be addressed.
Entropy 2025, 27(2), 101; https://doi.org/10.3390/e27020101
Submission received: 17 November 2024 / Revised: 7 January 2025 / Accepted: 13 January 2025 / Published: 21 January 2025
(This article belongs to the Section Thermodynamics)
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Abstract

Based on the transport theory of multicomponent gas mixtures, we proposed an expression for determining the standard volatilisation enthalpy and entropy of chromia exposed to humidified oxygen at 298 K. The use of this expression could lead to the quantification of those thermodynamic quantities when the mass flux of Cr loss due to the volatilisation of chromia is determined. We thus experimentally measured the mass fluxes of Cr loss due to volatilisation in humidified atmospheres at 873–1073 K. As a result, the standard enthalpy and entropy of the volatilisation of chromia subjected to humidified oxygen at 298 K were quantified, giving the values of 61.1 ± 1.0 kJ mol−1 and −43.0 ± 1.9 J K−1 mol−1, respectively. The measured and calculated mass fluxes of Cr loss due to volatilisation tended to be related to absolute temperature in the Arrhenius-like form. We proposed the use of the line of the mass flux of Cr loss due to volatilisation in an Arrhenius-like diagram, which was shifted by the different thermodynamic data used to graphically assess the reliability of the thermodynamic data obtained from this work and the literature.
Keywords: chromium poisoning; volatilisation; chromia; interconnect; solid oxide fuel cells chromium poisoning; volatilisation; chromia; interconnect; solid oxide fuel cells

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MDPI and ACS Style

Thublaor, T.; Tengprasert, W.; Suparapinyopapkul, G.; Nilsonthi, T.; Chandra-ambhorn, W.; Chandra-ambhorn, S. Novel Method for Determining Standard Enthalpy and Entropy of Volatilisation of Chromia Exposed to Humidified Oxygen at 298 K Based on Transport Theory of Multicomponent Gas Mixtures. Entropy 2025, 27, 101. https://doi.org/10.3390/e27020101

AMA Style

Thublaor T, Tengprasert W, Suparapinyopapkul G, Nilsonthi T, Chandra-ambhorn W, Chandra-ambhorn S. Novel Method for Determining Standard Enthalpy and Entropy of Volatilisation of Chromia Exposed to Humidified Oxygen at 298 K Based on Transport Theory of Multicomponent Gas Mixtures. Entropy. 2025; 27(2):101. https://doi.org/10.3390/e27020101

Chicago/Turabian Style

Thublaor, Thammaporn, Watcharapon Tengprasert, Grid Suparapinyopapkul, Thanasak Nilsonthi, Walairat Chandra-ambhorn, and Somrerk Chandra-ambhorn. 2025. "Novel Method for Determining Standard Enthalpy and Entropy of Volatilisation of Chromia Exposed to Humidified Oxygen at 298 K Based on Transport Theory of Multicomponent Gas Mixtures" Entropy 27, no. 2: 101. https://doi.org/10.3390/e27020101

APA Style

Thublaor, T., Tengprasert, W., Suparapinyopapkul, G., Nilsonthi, T., Chandra-ambhorn, W., & Chandra-ambhorn, S. (2025). Novel Method for Determining Standard Enthalpy and Entropy of Volatilisation of Chromia Exposed to Humidified Oxygen at 298 K Based on Transport Theory of Multicomponent Gas Mixtures. Entropy, 27(2), 101. https://doi.org/10.3390/e27020101

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