<scp>
              SnO
              <sub>2</sub>
            </scp>
            /
            <scp>SnO</scp>
            based redox thermochemical
            <scp>
              CO
              <sub>2</sub>
            </scp>
            splitting cycle: Effect of inert gas flowrate, reduction temperature, and gas separation on the
            <scp>solar‐to‐fuel</scp>
            energy conversion efficiency

Bhosale, Rahul R.; Shende, Rajesh V.; Gupta, Ram B.

doi:10.1002/er.7804

Cited by 4 publications

(4 citation statements)

References 54 publications

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“…In Figure 13, a comparison is presented between the CDS cycles of GeO 2 /GeO-based, ZnO/Zn-based [38], and SnO 2 /SnO-based materials [39]. The comparison is based on the values of η solar−to− f uel .…”

Section: Resultsmentioning

confidence: 99%

“…The GeO 2 /GeO CDS cycle is capable of achieving a reasonably high η solar−to− f uel of 10% at a temperature of less than 1600 K. On the other hand, the ZnO/Zn and SnO 2 /SnO CDS cycles require a higher operating temperature of more than 1850 K to achieve the same level of efficiency. In Figure 13, a comparison is presented between the CDS cycles of GeO2/GeO-based, ZnO/Zn-based [38], and SnO2/SnO-based materials [39]. The comparison is based on the values of 𝜂 .…”

Section: Resultsmentioning

confidence: 99%

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Assessing the Viability of GeO2/GeO Redox Thermochemical Cycle for Converting CO2 into Solar Fuels

Bhosale,

Adams,

Allen

et al. 2024

Sustainability

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The solar thermochemical process of splitting CO2, known as CDS, is studied here using a redox cycle involving GeO2/GeO. The required thermodynamic data for a second-law-efficiency analysis is obtained from the HSC Chemistry software. The goal of this study is to investigate how different parameters, such as the operating temperatures and molar flow rate of the inert sweep gas, as well as the inclusion of separation units, heat exchangers, heaters, and coolers, can affect the solar-to-fuel energy conversion efficiency of the GeO2/GeO cycle. All calculations assume a constant gas-to-gas heat recovery effectiveness of 0.5. The analysis shows that the solar-to-fuel energy conversion efficiency is lower at a thermal reduction temperature of 1600 K (11.9%) compared to 2000 K. This is because high energy duties are required for heater-2, heater-3, and separator-1 due to the need for a higher inert gas flow rate. After conducting a comparative analysis of the three CDS cycles, it can be inferred that the GeO2/GeO cycle exhibits a significantly higher solar-to-fuel energy conversion efficiency in comparison to the ZnO/Zn and SnO2/SnO cycles across all thermal reduction temperatures. According to the comparison, it is confirmed that the GeO2/GeO CDS cycle can achieve a reasonably high solar-to-fuel energy conversion efficiency of 10% at less than 1600 K. On the other hand, ZnO/Zn and SnO2/SnO CDS cycles require a thermal reduction temperature of more than 1850 K to achieve a solar-to-fuel energy conversion efficiency of 10%.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Assessing the Viability of GeO2/GeO Redox Thermochemical Cycle for Converting CO2 into Solar Fuels

Bhosale,

Adams,

Allen

et al. 2024

Sustainability

Self Cite

View full text Add to dashboard Cite

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“…(3) Reduction, as well as oxidation chambers, are operated at isothermal conditions; (4) Chemical equilibrium between the MnFe 2 O 4 and the gases; (5) The efficiency of an Ideal CO 2 /CO fuel cell equal to 100%; (6) All reactions undergo complete conversion; (7) Kinetic/potential energy and viscous losses are not considered; (8) No side reactions; (9) 20% of thermal energy losses from the reduction chamber; (10) All the calculations are standardized to . n MnF = 1 mol/s.…”

Section: Thermodynamic Model and Equationsmentioning

confidence: 99%

“…Several MOs redox systems have been investigated for both CDS and WS. The list includes ZnO/Zn [5,6], SnO 2 /SnO/Sn [7,8], Fe 3 O 4 /FeO/Fe [9,10], ferrites [11,12], ceria [13,14], doped ceria [15,16], perovskites [17,18], and others [19,20]. Among all the MOs mentioned above, ferrites (doped iron oxides) were examined for WS application more than CDS.…”

Section: Introductionmentioning

confidence: 99%

Utilization of MnFe2O4 Redox Ferrite for Solar Fuel Production via CO2 Splitting: A Thermodynamic Study

et al. 2023

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A thermodynamic efficiency analysis of MnFe2O4-based CO2 splitting (CDS) cycle is reported. HSC Chemistry software is used for performing the calculations allied with the model developed. By maintaining the reduction nonstoichiometry equal to 0.1, variations in the thermal energy required to drive the cycle and solar-to-fuel energy conversion efficiency as a function of the ratio of the molar flow rate of inert sweep gas to the molar flow rate of Mn-ferrite, reduction temperature, and gas-to-gas heat recovery effectiveness are studied. This study confirms that the thermal reduction temperature needed to achieve reduction nonstoichiometry equal to 0.1 is reduced when the inert gas flow rate is increased. Conversely, due to the requirement of the additional energy to heat the inert gas, the thermal energy required to drive the cycle is upsurged considerably. As the solar-to-fuel energy conversion efficiency depends significantly on the thermal energy required to drive the cycle, a reduction in it is recorded. As the ratio of the molar flow rate of inert sweep gas to the molar flow rate of Mn-ferrite is increased from 10 to 100, the solar-to-fuel energy conversion efficiency is decreased from 14.9% to 9.9%. By incorporating gas-to-gas heat recovery, a drastic drop in the thermal energy required to drive the cycle is attained which further resulted in a rise in the solar-to-fuel energy conversion efficiency. The maximum solar-to-fuel energy conversion efficiency (17.5%) is achieved at the ratio of the molar flow rate of inert sweep gas to the molar flow rate of Mn-ferrite equal to 10 as well as 20 when 90% of gas-to-gas heat recovery is applied.

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Research progress on metal oxide oxygen carrier materials for two-step solar thermochemical cycles in the last five years

Zheng,

Yu,

Tan

et al. 2024

Energy Conversion and Management

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SnO ₂ / SnO based redox thermochemical CO ₂ splitting cycle: Effect of inert gas flowrate, reduction temperature, and gas separation on the solar‐to‐fuel energy conversion efficiency

Cited by 4 publications

References 54 publications

Assessing the Viability of GeO2/GeO Redox Thermochemical Cycle for Converting CO2 into Solar Fuels

Assessing the Viability of GeO2/GeO Redox Thermochemical Cycle for Converting CO2 into Solar Fuels

Utilization of MnFe2O4 Redox Ferrite for Solar Fuel Production via CO2 Splitting: A Thermodynamic Study

Research progress on metal oxide oxygen carrier materials for two-step solar thermochemical cycles in the last five years

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SnO 2 / SnO based redox thermochemical CO 2 splitting cycle: Effect of inert gas flowrate, reduction temperature, and gas separation on the solar‐to‐fuel energy conversion efficiency

Cited by 4 publications

References 54 publications

Assessing the Viability of GeO2/GeO Redox Thermochemical Cycle for Converting CO2 into Solar Fuels

Assessing the Viability of GeO2/GeO Redox Thermochemical Cycle for Converting CO2 into Solar Fuels

Utilization of MnFe2O4 Redox Ferrite for Solar Fuel Production via CO2 Splitting: A Thermodynamic Study

Research progress on metal oxide oxygen carrier materials for two-step solar thermochemical cycles in the last five years

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Product

Resources

About

SnO ₂ / SnO based redox thermochemical CO ₂ splitting cycle: Effect of inert gas flowrate, reduction temperature, and gas separation on the solar‐to‐fuel energy conversion efficiency