Lange, Matthias and Roeb, Martin and Sattler, Christian and Pitz-Paal, Robert (2016) Entropy Analysis of Solar Two-Step Thermochemical Cycles for Water and Carbon Dioxide Splitting. Entropy, 18 (24), pp. 1-12. Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/e18010024. ISSN 1099-4300.
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Official URL: http://www.mdpi.com/1099-4300/18/1/24
Abstract
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.
Item URL in elib: | https://elib.dlr.de/101963/ | |||||||||||||||
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Document Type: | Article | |||||||||||||||
Title: | Entropy Analysis of Solar Two-Step Thermochemical Cycles for Water and Carbon Dioxide Splitting | |||||||||||||||
Authors: |
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Date: | 11 January 2016 | |||||||||||||||
Journal or Publication Title: | Entropy | |||||||||||||||
Refereed publication: | Yes | |||||||||||||||
Open Access: | Yes | |||||||||||||||
Gold Open Access: | Yes | |||||||||||||||
In SCOPUS: | Yes | |||||||||||||||
In ISI Web of Science: | Yes | |||||||||||||||
Volume: | 18 | |||||||||||||||
DOI : | 10.3390/e18010024 | |||||||||||||||
Page Range: | pp. 1-12 | |||||||||||||||
Editors: |
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Publisher: | Multidisciplinary Digital Publishing Institute (MDPI) | |||||||||||||||
ISSN: | 1099-4300 | |||||||||||||||
Status: | Published | |||||||||||||||
Keywords: | solar; thermochemical cycle; CSP; water splitting; CO2 splitting; T-S diagram; efficiency; entropy | |||||||||||||||
HGF - Research field: | Energy | |||||||||||||||
HGF - Program: | Renewable Energies | |||||||||||||||
HGF - Program Themes: | Solar Fuels | |||||||||||||||
DLR - Research area: | Energy | |||||||||||||||
DLR - Program: | E SF - Solar research | |||||||||||||||
DLR - Research theme (Project): | E - Solar Fuels (old) | |||||||||||||||
Location: | Köln-Porz | |||||||||||||||
Institutes and Institutions: | Institute of Solar Research > Solare Verfahrenstechnik | |||||||||||||||
Deposited By: | Sattler, Prof. Dr. Christian | |||||||||||||||
Deposited On: | 12 Jan 2016 13:49 | |||||||||||||||
Last Modified: | 20 Jun 2021 15:47 |
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