Comparison of sCO2 and He Brayton cycles integration in a Calcium-Looping for Concentrated Solar Power

Tesio, Umberto; Guelpa, Elisa; Verda, Vittorio

doi:10.1016/j.energy.2022.123467

Cited by 13 publications

(2 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The main advantages of the CaL process for TCES applications for CSP plants are: (i) the high reaction enthalpy (Equation (1)), (ii) the high working temperature achievable (up to 850 • C) to couple more efficient power cycles [26], and (iii) the sorbent material characteristics (non-toxic, Earth-abundant and cheap) [27,28]. However, the sorbent capacity decays with carbonation/calcination cycles given the high working temperature [29,30].…”

Section: Introductionmentioning

confidence: 99%

Partial Separation of Carbonated Material to Improve the Efficiency of Calcium Looping for the Thermochemical Storage of Solar Energy

Pascual,

Tregambi,

Di Lauro

et al. 2024

Energies

View full text Add to dashboard Cite

Concentrating solar power (CSP) technology with thermal energy storage (TES) could contribute to achieving a net zero emissions scenario by 2050. Calcium looping (CaL) is one of the potential TES processes for the future generation of CSP plants coupled with highly efficient power cycles. Research on CaL as a system for thermochemical energy storage (TCES) has focused on efficiency enhancement based on hybridization with other renewable technologies. This work proposes a novel solid management system to improve the efficiency of a CaL TCES system. The inclusion of a solid–solid separation unit after the carbonation step could lead to energy and size savings. The role of segregation between carbonated and calcined material on plant requirements is assessed, given the experimental evidence on the potential classification between more and less carbonated particles. The results show lower energy (up to 12%) and size (up to 76%) demands when the circulation of less carbonated material through the CaL TCES system diminishes. Moreover, under a classification effectiveness of 100%, the retrieval energy could increase by 32%, and the stored energy is enhanced by five times. The present work can be a proper tool to set the design and size of a CaL TCES system with a partial separation of the carbonated material.

show abstract

Section: Introductionmentioning

confidence: 99%

Partial Separation of Carbonated Material to Improve the Efficiency of Calcium Looping for the Thermochemical Storage of Solar Energy

Pascual,

Tregambi,

Di Lauro

et al. 2024

Energies

View full text Add to dashboard Cite

show abstract

“…The process to capture CO 2 , also known as calcium looping (CaL), uses a CaO-based sorbent reacting via the reversible reaction of the calcination of CaCO 3 [12][13][14][15][16]. Another application of this calcium looping system is in concentrated solar power (CSP) systems [17,18]. In these systems, the CaCO 3 is decomposed into CaO and CO 2 at the calcination stage when absorbing solar energy, and when the sunlight is weak at night, an exothermic reaction between CaO and CO 2 takes place to retrieve the thermal energy and reform CaCO 3 .…”

Section: Introductionmentioning

confidence: 99%

The Treatment of Natural Calcium Materials Using the Supercritical Antisolvent Method for CO2 Capture Applications

Nobre,

Teixeira,

Pinheiro

et al. 2024

Processes

View full text Add to dashboard Cite

The potential of the supercritical antisolvent micronization (SAS) technique was evaluated for the production of CaO-based particles with a size and a physical structure that could enable high performance for CO2 capture through the calcium looping process. Two sources of calcium derivative compounds were tested, waste marble powder (WMP) and dolomite. The SAS micronization of the derivate calcium acetate was carried out at 60 °C, 200 bar, a 0.5 mL min−1 flow rate of liquid solution, and 20 mg mL−1 concentration of solute, producing, with a yield of more than 70%, needle-like particles. Moreover, since dolomite presents with a mixture of calcium and magnesium carbonates, the influence of the magnesium fraction in the SAS micronization was also assessed. The micronized mixtures with lower magnesium content (higher calcium fraction) presented needle-like particles similar to WMP. On the other hand, for the higher magnesium fractions, the micronized material was similar to magnesium acetate micronization, presenting sphere-like particles. The use of the micronized material in the Ca-looping processes, considering 10 carbonation-calcination cycles under mild and realistic conditions, showed that under mild conditions, the micronized WMP improved CaO conversion. After 10 cycles the micronization, WMP presented a conversion 1.8 times greater than the unprocessed material. The micronized dolomite, under both mild and real conditions, maintained more stable conversion after 10 cycles.

show abstract

Comparative dynamic performance of SCO2 cycle and combined cycle with transiently modelled printed circuit heat exchangers

Zhu,

Xie,

Berrouk

2024

Applied Thermal Engineering

View full text Add to dashboard Cite

Comparison of sCO2 and He Brayton cycles integration in a Calcium-Looping for Concentrated Solar Power

Cited by 13 publications

References 38 publications

Partial Separation of Carbonated Material to Improve the Efficiency of Calcium Looping for the Thermochemical Storage of Solar Energy

Partial Separation of Carbonated Material to Improve the Efficiency of Calcium Looping for the Thermochemical Storage of Solar Energy

The Treatment of Natural Calcium Materials Using the Supercritical Antisolvent Method for CO2 Capture Applications

Comparative dynamic performance of SCO2 cycle and combined cycle with transiently modelled printed circuit heat exchangers

Contact Info

Product

Resources

About