Entropy Analysis of Solar Two-Step Thermochemical Cycles for Water and Carbon Dioxide Splitting
The present study provides a thermodynamic analysis of solar thermochemical cycles for splitting of H2O or CO2. Such cycles, powered by concentrated solar energy, have the potential to produce fuels in a sustainable way. We extend a previous study on the thermodynamics of water splitting by also tak...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2016-01-01
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| Series: | Entropy |
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| Online Access: | http://www.mdpi.com/1099-4300/18/1/24 |
| _version_ | 1818035568410361856 |
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| author | Matthias Lange Martin Roeb Christian Sattler Robert Pitz-Paal |
| author_facet | Matthias Lange Martin Roeb Christian Sattler Robert Pitz-Paal |
| author_sort | Matthias Lange |
| collection | DOAJ |
| description | The present study provides a thermodynamic analysis of solar thermochemical cycles for splitting of H2O or CO2. Such cycles, powered by concentrated solar energy, have the potential to produce fuels in a sustainable way. We extend a previous study on the thermodynamics of water splitting by also taking into account CO2 splitting and the influence of the solar absorption efficiency. Based on this purely thermodynamic approach, efficiency trends are discussed. The comprehensive and vivid representation in T-S diagrams provides researchers in this field with the required theoretical background to improve process development. Furthermore, results about the required entropy change in the used redox materials can be used as a guideline for material developers. The results show that CO2 splitting is advantageous at higher temperature levels, while water splitting is more feasible at lower temperature levels, as it benefits from a great entropy change during the splitting step. |
| first_indexed | 2024-12-10T06:57:07Z |
| format | Article |
| id | doaj.art-03363cb6bb8f4c338b4d35c3c12fae7f |
| institution | Directory Open Access Journal |
| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-12-10T06:57:07Z |
| publishDate | 2016-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Entropy |
| spelling | doaj.art-03363cb6bb8f4c338b4d35c3c12fae7f2022-12-22T01:58:25ZengMDPI AGEntropy1099-43002016-01-011812410.3390/e18010024e18010024Entropy Analysis of Solar Two-Step Thermochemical Cycles for Water and Carbon Dioxide SplittingMatthias Lange0Martin Roeb1Christian Sattler2Robert Pitz-Paal3German Aerospace Center (DLR), Institute of Solar Research, Linder Höhe, 51170 Köln, GermanyGerman Aerospace Center (DLR), Institute of Solar Research, Linder Höhe, 51170 Köln, GermanyGerman Aerospace Center (DLR), Institute of Solar Research, Linder Höhe, 51170 Köln, GermanyGerman Aerospace Center (DLR), Institute of Solar Research, Linder Höhe, 51170 Köln, GermanyThe present study provides a thermodynamic analysis of solar thermochemical cycles for splitting of H2O or CO2. Such cycles, powered by concentrated solar energy, have the potential to produce fuels in a sustainable way. We extend a previous study on the thermodynamics of water splitting by also taking into account CO2 splitting and the influence of the solar absorption efficiency. Based on this purely thermodynamic approach, efficiency trends are discussed. The comprehensive and vivid representation in T-S diagrams provides researchers in this field with the required theoretical background to improve process development. Furthermore, results about the required entropy change in the used redox materials can be used as a guideline for material developers. The results show that CO2 splitting is advantageous at higher temperature levels, while water splitting is more feasible at lower temperature levels, as it benefits from a great entropy change during the splitting step.http://www.mdpi.com/1099-4300/18/1/24solarthermochemical cycleCSPwater splittingCO2 splittingT-S diagramefficiencyentropy |
| spellingShingle | Matthias Lange Martin Roeb Christian Sattler Robert Pitz-Paal Entropy Analysis of Solar Two-Step Thermochemical Cycles for Water and Carbon Dioxide Splitting Entropy solar thermochemical cycle CSP water splitting CO2 splitting T-S diagram efficiency entropy |
| title | Entropy Analysis of Solar Two-Step Thermochemical Cycles for Water and Carbon Dioxide Splitting |
| title_full | Entropy Analysis of Solar Two-Step Thermochemical Cycles for Water and Carbon Dioxide Splitting |
| title_fullStr | Entropy Analysis of Solar Two-Step Thermochemical Cycles for Water and Carbon Dioxide Splitting |
| title_full_unstemmed | Entropy Analysis of Solar Two-Step Thermochemical Cycles for Water and Carbon Dioxide Splitting |
| title_short | Entropy Analysis of Solar Two-Step Thermochemical Cycles for Water and Carbon Dioxide Splitting |
| title_sort | entropy analysis of solar two step thermochemical cycles for water and carbon dioxide splitting |
| topic | solar thermochemical cycle CSP water splitting CO2 splitting T-S diagram efficiency entropy |
| url | http://www.mdpi.com/1099-4300/18/1/24 |
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