Solar-driven thermochemical redox cycles of ZrO2 supported NiFe2O4 for CO2 reduction into chemical energy

Shuai, Yong; Zhang, Hao; Lougou, Bachirou Guene; Jiang, Baocheng; Mustafa, Azeem; Wang, Chi-Hwa; Wang, Fuqiang; Zhao, Jiupeng

doi:10.1016/j.energy.2021.120073

Cited by 29 publications

(9 citation statements)

References 53 publications

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“…The high theoretical conversion and perfect redox reversibility of Co 3 O 4 have made it one of the most promising thermochemical materials for energy storage and hydrogen production involving a reduction temperature of 900 °C. , Additionally, nickel-based redox couple NiO–Ni has been classified as one of the more cost-effective thermochemical materials to replace molten salts but several technical issues could be identified because of its low stabitlity . However, the incorporation of nickel into a pure metal oxide producing mixed metal oxides such as NiFe 2 O 4 and Co 3– x Ni x O 4 has proven the tendency to enhance both the stability and reversibility criteria of the resulting thermochemical materials. , …”

Section: Introductionmentioning

confidence: 71%

Synthesis, Experimental, and Theoretical Study of Co_3–xNi_xO₄ Mixed Oxides: Potential Candidates for Hydrogen Production via Solar Redox Cycles

et al. 2022

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Recently, green hydrogen production via solar thermochemical water splitting (STWS) as a clean and sustainable method is becoming a subject of interest to many researchers. Great efforts are being made to develop materials for STWS with suitable operating conditions, low cost, and good cycling stability. In this context, the study of mixed cobalt and nickel oxides with the general formula Co3–x Ni x O4 (0 ≤ x ≤ 1) was carried out, where four mixed metal oxides Co2.75Ni0.25O4, Co2.5Ni0.5O4, Co2.25Ni0.75O4, and Co2NiO4 have been successfully synthesized through the sol–gel method modified Pechini route. The structural investigation demonstrated that pure spinel structures were obtained for 0 ≤ x ≤ 0.75. A deep study was carried out with the main goal of finding the best phase that provides low redox temperature. Interesting reduction temperatures for all the compositions have been found, and the lowest values of 675 and 710 °C have been reported for Co2.25Ni0.75O4 and Co2.5Ni0.5O4, respectively. The thermal cycling results of this latest material using TGA measurement have proven attractive cycling stability of which the complete reoxidation of the samples was achieved. In addition, thermodynamic analysis of a reduction step was performed and good agreement of the theoretical reduction temperature of Co2.25Ni0.75O4 with the experimental one has been found.

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Section: Introductionmentioning

confidence: 71%

Synthesis, Experimental, and Theoretical Study of Co_3–xNi_xO₄ Mixed Oxides: Potential Candidates for Hydrogen Production via Solar Redox Cycles

et al. 2022

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“…The model is based on the solar thermochemical reactor developed by Guene Lougou et al 28 and experimentally used in Refs. 29, 47‐50 for thermochemical energy conversion and syngas production at a laboratory scale. As the reaction heat source is induced, the solar irradiation cavity is replaced by an induction heating system.…”

Section: Methodsmentioning

confidence: 99%

Thermal and electrical performance analysis of induction heating based‐thermochemical reactor for heat storage integration into power systems

Gassi

Lougou

Baysal

et al. 2021

Intl J of Energy Research

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In this study, the thermal and electrical performance analysis of an induction heating based-thermochemical reactor is investigated for high-temperature heat storage. The induction-heating model is built with Maxwell equations, and the surface-to-surface (S2S) radiation model is used for the induced and diffused thermal energy flow transport in the fluid phase within the reactor inner cavity. The effects of operating and structural parameters in terms of the coil turn number, coil current intensity and frequency, the conductive plate, and the coil's relative permeability, electrical conductivity, and emissivity could affect the heat generation, input power demand, and energy consumption of the proposed reactor performance are sufficiently investigated. It is found that the reactor temperature distribution resulted from the homogenized multi-turn coil magnetomotive force and frequency with the current intensity 48% more effective in reaching the desired temperature at the heat storage medium. However, the conductive plate relative permeability, electrical conductivity, and surface emissivity significantly affect the induction heating system's thermal power, with the relative permeability having the highest impact of 13% in the storage medium's temperature increasing at low current intensity. Moreover, the surface emissivity shows remarkable effects when the inducting heating operates at a high current. Significant energy consumption, more than 159%, is observed when the induction heating generator operates at steady-state mode. The reactor heating region temperature increases when the reactor operating current and frequency get high. It is observed that the more the induced heat was applied to the reactor, the more the reactor is heating up to a steady-state. The instantaneous temperature distribution inside the reactor depicted the rise in the temperature is caused by convection and radiation heat transfer. Higher and more uniform temperature distribution inside the reactor is obtained by optimizing the reactor operating and structural parameters.

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“…where the subscript "rev" denotes energy exchanges of reversible transformations. The dependence on the initial state is an exponential decay in τ j / θ and therefore contributes to much higher orders than those in equations ( 20), (21), and (22). In other terms, the final state of each irreversible process at the first order in θ/τ j depends only on the initial state of the corresponding quasistatic transformation.…”

Section: Irreversible Cyclesmentioning

confidence: 99%

“…The heat and work exchanges of irreversible transformations are the right-hand-sides of equations (D1), (D3) and (D4), as discussed in Appendix D. Plugging there the expansion (E13), the approximations (20) and (21) are dervied with the following first order coontributions in θ/τ : where integration by parts have been used. Note that the traces involving the time derivatives of N and H can be written, by virtue of equations (E7) and (E8), as:…”

Section: Work and Heat Correctionsmentioning

confidence: 99%

“…volume expansion or directed difts and rotations, is generated from chemical potential grandients [5][6][7][8][9][10][11], from the splitting of chemical bonds (molecular motors) [12,13] as in ATP hydrolysis, from thermal diffusion modelled by Langevin and Fokker-Planck equations (Brownian motors) [10,14,15], and from surface energy in interface phenomena like tears of wine, beating oil lenses, and self-oscillating pendant droplets [16]. Recent technologically oriented applications are syngas production [17], capacitive deionisation for desalinisation of blackish water [18,19], CO 2 capture by carbonation-decarbonation cycles [20], solardriven CO 2 reduction [21], chemical looping for hydrogen production [22,23] and for energy and carbon storage [24,25], low-grade heat harvesting [26][27][28], pyrolytic reactions to increase the efficiency of turbine engines [29].…”

Section: Introductionmentioning

confidence: 99%

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Quantum thermochemical engines

Marzolino¹

2022

Preprint

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Convertion of chemical energy into mechanical work is the fundamental mechanism of several natural phenomena at the nanoscale, like molecular machines and Brownian motors. Quantum mechanical effects are relevant for optimising these processes and to implement them at the atomic scale. This paper focuses on engines that transform chemical work into mechanical work through energy and particle exchanges with thermal sources at different chemical potentials. Irreversibility is introduced by modelling the engine transformations with finite-time dynamics generated by a time-depending quantum master equation. Quantum degenerate gases provide maximum efficiency for reversible engines, whereas the classical limit implies small efficiency. For irreversible engines, both the output power and the efficiency at maximum power are much larger in the quantum regime than in the classical limit. The analysis of ideal homogeneous gases grasps the impact of quantum statistics on the above performances, which persists in the presence of interactions and more general trapping. The performance dependence on different types of Bose-Einstein Condensates (BECs) is also studied. BECs under considerations are standard BECs with a finite fraction of particles in the ground state, and generalised BECs where eigenstates with parallel momenta, or those with coplanar momenta are macroscopically occupied according to the confinement anisotropy. Quantum statistics is therefore a resource for enhanced performances of converting chemical into mechanical work.

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Solar-driven thermochemical redox cycles of ZrO2 supported NiFe2O4 for CO2 reduction into chemical energy

Cited by 29 publications

References 53 publications

Synthesis, Experimental, and Theoretical Study of Co_3–xNi_xO₄ Mixed Oxides: Potential Candidates for Hydrogen Production via Solar Redox Cycles

Synthesis, Experimental, and Theoretical Study of Co_3–xNi_xO₄ Mixed Oxides: Potential Candidates for Hydrogen Production via Solar Redox Cycles

Thermal and electrical performance analysis of induction heating based‐thermochemical reactor for heat storage integration into power systems

Quantum thermochemical engines

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Solar-driven thermochemical redox cycles of ZrO2 supported NiFe2O4 for CO2 reduction into chemical energy

Cited by 29 publications

References 53 publications

Synthesis, Experimental, and Theoretical Study of Co3–xNixO4 Mixed Oxides: Potential Candidates for Hydrogen Production via Solar Redox Cycles

Synthesis, Experimental, and Theoretical Study of Co3–xNixO4 Mixed Oxides: Potential Candidates for Hydrogen Production via Solar Redox Cycles

Thermal and electrical performance analysis of induction heating based‐thermochemical reactor for heat storage integration into power systems

Quantum thermochemical engines

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Synthesis, Experimental, and Theoretical Study of Co_3–xNi_xO₄ Mixed Oxides: Potential Candidates for Hydrogen Production via Solar Redox Cycles

Synthesis, Experimental, and Theoretical Study of Co_3–xNi_xO₄ Mixed Oxides: Potential Candidates for Hydrogen Production via Solar Redox Cycles