Application of chromium oxide-based redox reactions for hydrogen production via solar thermochemical splitting of water
<p dir="ltr">Thermodynamic equilibrium, as well as efficiency analysis of the Cr<sub>2</sub>O<sub>3</sub>/Cr water splitting (Cr-WS) cycle, was conducted in this study. The thermodynamic properties required for the computations were obtained from an HSC Chemis...
محفوظ في:
| المؤلف الرئيسي: | |
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| منشور في: |
2020
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| الموضوعات: | |
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إضافة وسم
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| الملخص: | <p dir="ltr">Thermodynamic equilibrium, as well as efficiency analysis of the Cr<sub>2</sub>O<sub>3</sub>/Cr water splitting (Cr-WS) cycle, was conducted in this study. The thermodynamic properties required for the computations were obtained from an HSC Chemistry 9.9 software. An increase in thermal reduction (TR) temperature (T<sub>H</sub>) from 1800 K to 2230 K was responsible for the rise in the percentage TR of Cr<sub>2</sub>O<sub>3</sub> (Tr-Cr) from 0% to 100%. The equilibrium analysis additionally indicates that the re-oxidation of Cr into Cr<sub>2</sub>O<sub>3 </sub>via WS reaction is feasible at any temperature from 300 to 3000 K (we have selected 1300 K for this study). The efficiency analysis indicates that the Q<sub>solar-reactor-Cr-WS</sub> and Q<sub>solar-heater-Cr-WS</sub> were enhanced by 3636.8 kW and 260.0 kW due to the increment in the TH from 1800 K to 2230 K. The increase in the Q<sub>solar-reactor-Cr-WS</sub> and Q<sub>solar-heater-Cr-WS</sub> resulted into a rise in the Q<sub>solar-cycle-Cr-WS</sub> by 3896.8 kW. The<sub>ηsolar to fuel Cr WS</sub>increased from 9.5% to 26.4% when the T<sub>H</sub> was augmented from 1800 K to 2000 K. A further rise in the T<sub>H</sub> from 2000 K to 2230 K resulted in a reduction in the<sub>ηsolar to fuel Cr WS</sub> from 26.4% to 21.3%. After employing the 100% heat recuperation, the<sub>ηsolar to fuel HR Cr WS of the Cr-WS</sub><sub> </sub> cycle was improved up to 48.3% at T<sub>H</sub> = 2000 K.</p><h2>Other Information</h2><p dir="ltr">Published in: Fuel<br>License: <a href="http://creativecommons.org/licenses/by/4.0/" target="_blank">http://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.1016/j.fuel.2020.118160" target="_blank">https://dx.doi.org/10.1016/j.fuel.2020.118160</a></p> |
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