Conversion of Carbon Dioxide into Solar Fuels Using MgFe<sub>2</sub>O<sub>4</sub> Thermochemical Redox Chemistry
Transforming H<sub>2</sub>O and CO<sub>2</sub> into solar fuels like syngas is crucial for future sustainable transportation fuel production. Therefore, the MgFe<sub>2</sub>O<sub>4</sub>/CO<sub>2</sub> splitting cycle was thermodynamically...
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2025-03-01
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| author | Rahul R. Bhosale |
| author_facet | Rahul R. Bhosale |
| author_sort | Rahul R. Bhosale |
| collection | DOAJ |
| description | Transforming H<sub>2</sub>O and CO<sub>2</sub> into solar fuels like syngas is crucial for future sustainable transportation fuel production. Therefore, the MgFe<sub>2</sub>O<sub>4</sub>/CO<sub>2</sub> splitting cycle was thermodynamically scrutinized to estimate its solar-to-fuel energy conversion efficiency in this investigation. The thermodynamic data required to solve the modeling equations were obtained using the HSC Chemistry program. The reduction non-stoichiometry was assumed to be equal to 0.1 for all computations. One of the study’s primary goals was to examine the impact of the inert sweep gas’s molar flow rate on the process parameters related to the MgFe<sub>2</sub>O<sub>4</sub>/CDS cycle. Overall, it was understood that the effect of the inert sweep gas’s molar flow rate on the thermal reduction temperature was significant when it increased from 10 to 40 mol/s compared to the rise from 40 to 100 mol/s. The energy needed to reduce MgFe<sub>2</sub>O<sub>4</sub> increased slightly due to the surge in the inert sweep gas’s molar flow rate. In contrast, the energy penalty for heating MgFe<sub>2</sub>O<sub>4-δred</sub> from the re-oxidation to thermal reduction temperature significantly decreased. Including gas-to-gas heat exchangers with a gas-to-gas heat recovery effectiveness equal to 0.5 helped reduce the energy demand for heating the inert sweep gas. Overall, although the rise in the inert sweep gas’s molar flow rate from 10 to 100 mol/s caused a drop in the thermal reduction temperature by 180 K, the total solar energy needed to drive the cycle was increased by 85.7 kW. Accordingly, the maximum solar-to-fuel energy conversion efficiency (13.1%) was recorded at an inert sweep gas molar flow rate of 10 mol/s, which decreased by 3.7% when it was increased to 100 mol/s. |
| format | Article |
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| institution | Kabale University |
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| language | English |
| publishDate | 2025-03-01 |
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| record_format | Article |
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| spelling | doaj-art-848289bf4abb477cb15d12a98c03ea0a2025-08-20T03:26:10ZengMDPI AGC2311-56292025-03-011122510.3390/c11020025Conversion of Carbon Dioxide into Solar Fuels Using MgFe<sub>2</sub>O<sub>4</sub> Thermochemical Redox ChemistryRahul R. Bhosale0Department of Chemical Engineering, University of Tennessee, 615 Mccallie Ave, Chattanooga, TN 37403, USATransforming H<sub>2</sub>O and CO<sub>2</sub> into solar fuels like syngas is crucial for future sustainable transportation fuel production. Therefore, the MgFe<sub>2</sub>O<sub>4</sub>/CO<sub>2</sub> splitting cycle was thermodynamically scrutinized to estimate its solar-to-fuel energy conversion efficiency in this investigation. The thermodynamic data required to solve the modeling equations were obtained using the HSC Chemistry program. The reduction non-stoichiometry was assumed to be equal to 0.1 for all computations. One of the study’s primary goals was to examine the impact of the inert sweep gas’s molar flow rate on the process parameters related to the MgFe<sub>2</sub>O<sub>4</sub>/CDS cycle. Overall, it was understood that the effect of the inert sweep gas’s molar flow rate on the thermal reduction temperature was significant when it increased from 10 to 40 mol/s compared to the rise from 40 to 100 mol/s. The energy needed to reduce MgFe<sub>2</sub>O<sub>4</sub> increased slightly due to the surge in the inert sweep gas’s molar flow rate. In contrast, the energy penalty for heating MgFe<sub>2</sub>O<sub>4-δred</sub> from the re-oxidation to thermal reduction temperature significantly decreased. Including gas-to-gas heat exchangers with a gas-to-gas heat recovery effectiveness equal to 0.5 helped reduce the energy demand for heating the inert sweep gas. Overall, although the rise in the inert sweep gas’s molar flow rate from 10 to 100 mol/s caused a drop in the thermal reduction temperature by 180 K, the total solar energy needed to drive the cycle was increased by 85.7 kW. Accordingly, the maximum solar-to-fuel energy conversion efficiency (13.1%) was recorded at an inert sweep gas molar flow rate of 10 mol/s, which decreased by 3.7% when it was increased to 100 mol/s.https://www.mdpi.com/2311-5629/11/2/25Mg-ferritesolar fuelsCO<sub>2</sub> utilizationthermochemical cyclethermodynamics |
| spellingShingle | Rahul R. Bhosale Conversion of Carbon Dioxide into Solar Fuels Using MgFe<sub>2</sub>O<sub>4</sub> Thermochemical Redox Chemistry C Mg-ferrite solar fuels CO<sub>2</sub> utilization thermochemical cycle thermodynamics |
| title | Conversion of Carbon Dioxide into Solar Fuels Using MgFe<sub>2</sub>O<sub>4</sub> Thermochemical Redox Chemistry |
| title_full | Conversion of Carbon Dioxide into Solar Fuels Using MgFe<sub>2</sub>O<sub>4</sub> Thermochemical Redox Chemistry |
| title_fullStr | Conversion of Carbon Dioxide into Solar Fuels Using MgFe<sub>2</sub>O<sub>4</sub> Thermochemical Redox Chemistry |
| title_full_unstemmed | Conversion of Carbon Dioxide into Solar Fuels Using MgFe<sub>2</sub>O<sub>4</sub> Thermochemical Redox Chemistry |
| title_short | Conversion of Carbon Dioxide into Solar Fuels Using MgFe<sub>2</sub>O<sub>4</sub> Thermochemical Redox Chemistry |
| title_sort | conversion of carbon dioxide into solar fuels using mgfe sub 2 sub o sub 4 sub thermochemical redox chemistry |
| topic | Mg-ferrite solar fuels CO<sub>2</sub> utilization thermochemical cycle thermodynamics |
| url | https://www.mdpi.com/2311-5629/11/2/25 |
| work_keys_str_mv | AT rahulrbhosale conversionofcarbondioxideintosolarfuelsusingmgfesub2subosub4subthermochemicalredoxchemistry |