Aluminum-doped calcium manganite particles for solar thermochemical energy storage: Reactor design, particle characterization, and heat and mass transfer modeling

Schrader, Andrew J.; Bush, H. Evan; Ranjan, Devesh; Loutzenhiser, Peter G.

doi:10.1016/j.ijheatmasstransfer.2020.119461

Cited by 29 publications

(7 citation statements)

References 82 publications

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“…Recently, CaMnO 3−δ and CaCr 0.1 Mn 0.9 O 3−δ were identified as the most promising compositions out of different Ca-Mn-based perovskites studied for oxygen atmosphere control in solar thermochemical processes [115]. Aluminum-doped calcium manganite CaAl 0.2 Mn 0.8 O 3−δ particles were synthesized and tested in a 5 kW th scale (seven-lamp high-flux solar simulator) reactor under vacuum for TCES via reversible point defect reactions [116,117]. The material was introduced to the reactor in the form of particle flow using temperatures up to 900 • C to avoid particle agglomeration.…”

Section: Tces Systems Based On Perovskitesmentioning

confidence: 99%

Recent Advances in Thermochemical Energy Storage via Solid–Gas Reversible Reactions at High Temperature

André

Abanades

2020

Energies

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The exploitation of solar energy, an unlimited and renewable energy resource, is of prime interest to support the replacement of fossil fuels by renewable energy alternatives. Solar energy can be used via concentrated solar power (CSP) combined with thermochemical energy storage (TCES) for the conversion and storage of concentrated solar energy via reversible solid–gas reactions, thus enabling round the clock operation and continuous production. Research is on-going on efficient and economically attractive TCES systems at high temperatures with long-term durability and performance stability. Indeed, the cycling stability with reduced or no loss in capacity over many cycles of heat charge and discharge of the material is pursued. The main thermochemical systems currently investigated are encompassing metal oxide redox pairs (MOx/MOx−1), non-stoichiometric perovskites (ABO3/ABO3−δ), alkaline earth metal carbonates and hydroxides (MCO3/MO, M(OH)2/MO with M = Ca, Sr, Ba). The metal oxides/perovskites can operate in open loop with air as the heat transfer fluid, while carbonates and hydroxides generally require closed loop operation with storage of the fluid (H2O or CO2). Alternative sources of natural components are also attracting interest, such as abundant and low-cost ore minerals or recycling waste. For example, limestone and dolomite are being studied to provide for one of the most promising systems, CaCO3/CaO. Systems based on hydroxides are also progressing, although most of the recent works focused on Ca(OH)2/CaO. Mixed metal oxides and perovskites are also largely developed and attractive materials, thanks to the possible tuning of both their operating temperature and energy storage capacity. The shape of the material and its stabilization are critical to adapt the material for their integration in reactors, such as packed bed and fluidized bed reactors, and assure a smooth transition for commercial use and development. The recent advances in TCES systems since 2016 are reviewed, and their integration in solar processes for continuous operation is particularly emphasized.

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Section: Tces Systems Based On Perovskitesmentioning

confidence: 99%

Recent Advances in Thermochemical Energy Storage via Solid–Gas Reversible Reactions at High Temperature

André

Abanades

2020

Energies

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“…Liu et al studied redox pairs of Mn 2 O 3 /Mn 3 O 4 and Co 3 O 4 /CoO [ 17 ], and Alonso et al investigated the CuO/Cu 2 O system for solar energy thermochemical storage [ 18 ]. Furthermore, doped calcium manganites were recently proposed as TES materials, proposing a novel radiative model [ 19 , 20 ]. Among them, the Mg(OH) 2 /MgO system based on the reversible dehydration/hydration reaction: Mg(OH) 2(s) ↔ MgO (s) + H 2 O (g) ∆H 0 = ±81 kJ/mol has been extensively studied in the last few years [ 21 , 22 ] as originally proposed by Kato et al [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Tuning Mg(OH)2 Structural, Physical, and Morphological Characteristics for Its Optimal Behavior in a Thermochemical Heat-Storage Application

et al. 2021

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Thermochemical materials (TCM) are among the most promising systems to store high energy density for long-term energy storage. To be eligible as candidates, the materials have to fit many criteria such as complete reversibility of the reaction and cycling stability, high availability of the material at low cost, environmentally friendliness, and non-toxicity. Among the most promising TCM, the Mg(OH)2/MgO system appears worthy of attention for its properties in line with those required. In the last few decades, research focused its attention on the optimization of attractive hydroxide performance to achieve a better thermochemical response, however, often negatively affecting its energy density per unit of volume and therefore compromising its applicability on an industrial scale. In this study, pure Mg(OH)2 was developed using different synthesis procedures. Reverse deposition precipitation and deposition precipitation methods were used to obtain the investigated samples. By adding a cationic surfactant (cetyl trimethylammonium bromide), deposition precipitation Mg(OH)2 (CTAB-DP-MH) or changing the precipitating precursor (N-DP-MH), the structural, physical and morphological characteristics were tuned, and the results were compared with a commercial Mg(OH)2 sample. We identified a correlation between the TCM properties and the thermochemical behavior. In such a context, it was demonstrated that both CTAB-DP-MH and N-DP-MH improved the thermochemical performances of the storage medium concerning conversion (64 wt.% and 74 wt.% respectively) and stored and released heat (887 and 1041 kJ/kgMg(OH)2). In particular, using the innovative technique not yet investigated for thermal energy storage (TES) materials, with NaOH as precipitating precursor, N-DP-MH reached the highest stored and released heat capacity per volume unit, ~684 MJ/m3.

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“…Oxide particle streams in their oxidized state are transported to the top of a solar tower where they are thermally reduced in a solar particle receiver. This receiver can be, for example, a rotary kiln (Neises et al, 2012), a fluidized or spouted bed type (Flamant et al, 2013;Ma et al, 2014), a gravity-led inclined "sliding-bed" type (Schrader et al, 2020), or a centrifugal receiver recently introduced and developed by DLR (Wu et al, 2014). The reduced particles are stored in a hot particle storage tank and subsequently fed to an oxidation reactor for power generation when and where needed.…”

Section: Introductionmentioning

confidence: 99%

Techno-Economic Analysis of Candidate Oxide Materials for Thermochemical Storage in Concentrating Solar Power Systems

et al. 2021

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The thermal storage capability is an important asset of state-of-the-art concentrating solar power plants. The use of thermochemical materials, such as redox oxides, for hybrid sensible/thermochemical storage in solar power plants offers the potential for higher specific volume and mass storage capacity and as a consequence reduced levelized cost of electricity making such plants more competitive. For the techno-economic system analysis, three candidate redox materials were analyzed for their cost reduction potential: cobalt-based, manganese–iron–based, and perovskite-based oxide materials. As a reference process the use of inert commercial bauxite particles (sensible-only storage) was considered. A solar thermal power plant with a nominal power of 125 MWe and a storage capacity of 12 h was assumed for the analysis. For each storage material a plant layout was made, taking the specific thermophysical properties of the material into account. Based on this layout a particle break-even cost for the specific material was determined, at which levelized cost of electricity parity is achieved with the reference system. Cost factors mainly influenced by the material selection are storage cost and steam generator cost. The particle transport system cost has only a minor impact. The results show differences in the characteristics of the materials, for example, regarding the impact on storage size and cost and the steam generator cost. Regarding the economic potential of the candidate redox materials, the perovskite-based particles promise to have advantages, as they might be produced from inexpensive raw materials.

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Aluminum-doped calcium manganite particles for solar thermochemical energy storage: Reactor design, particle characterization, and heat and mass transfer modeling

Cited by 29 publications

References 82 publications

Recent Advances in Thermochemical Energy Storage via Solid–Gas Reversible Reactions at High Temperature

Recent Advances in Thermochemical Energy Storage via Solid–Gas Reversible Reactions at High Temperature

Tuning Mg(OH)2 Structural, Physical, and Morphological Characteristics for Its Optimal Behavior in a Thermochemical Heat-Storage Application

Techno-Economic Analysis of Candidate Oxide Materials for Thermochemical Storage in Concentrating Solar Power Systems

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