Concentrating Solar Power (CSP) systems represent a key technology to exploit solar energy thanks to the easy integration with energy storage systems. The thermochemical energy storage (TCES) relies on reversible chemical reactions to store the solar energy in the form of chemical bonds. Limestone calcination/carbonation is an appealing reaction for TCES. This cycle has been widely studied in the Calcium Looping (CaL) process for Carbon Capture and Sequestration/Use (CCS/U), within which the calcination is usually carried out in a CO2−rich environment at temperature of 940–950 °C. When the CaL cycle is considered for TCES, the energy required by the calciner is supplied by CSP and the whole system has to work in a closed loop, as the CO2 released during the calcination is required for the subsequent carbonation. Therefore, the operating conditions resemble those typical of the CCS/U CaL. The novel idea of this work is to perform a CaL-TCES cycle working in an open loop configuration, by coupling the system with a CO2 emitting industry. Calcination can then be accomplished under air atmosphere at lower temperature, thus preserving to some extent the material reactivity. In particular, the open loop CaL-TCES cycle has been experimentally investigated using a Fluidized Bed (FB) reactor directly heated by a solar simulator (3 MW m−2 peak flux, 3 kWth total power). Several looping cycles have been carried out on a commercial limestone sample to estimate the sorbent reactivity over cycling. The properties of calcined sorbents have been investigated by chemical physical analyses. A comparison with results obtained under CCS/U CaL conditions has also been performed, to scrutinize the potential advantages of working in an open loop configuration.
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25 July 2019
SOLARPACES 2018: International Conference on Concentrating Solar Power and Chemical Energy Systems
2–5 October 2018
Casablanca, Morocco
Research Article|
July 25 2019
Limestone calcination–carbonation in a fluidized bed reactor/receiver for thermochemical energy storage applications
Claudio Tregambi;
Claudio Tregambi
a)
1
Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università degli Studi di Napoli Federico II
, Piazzale Vincenzo Tecchio 80, 80125 Napoli (Italy
)a)Corresponding author: [email protected]
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Francesca Di Lauro;
Francesca Di Lauro
2
Istituto di Ricerche sulla Combustione, Consiglio Nazionale delle Ricerche
, Piazzale Vincenzo Tecchio 80, 80125 Napoli (Italy
)
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Fabio Montagnaro;
Fabio Montagnaro
3
Dipartimento di Scienze Chimiche, Università degli Studi di Napoli Federico II, Complesso Universitario di Monte Sant’Angelo
, 80126 Napoli (Italy
)
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Piero Salatino;
Piero Salatino
1
Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università degli Studi di Napoli Federico II
, Piazzale Vincenzo Tecchio 80, 80125 Napoli (Italy
)
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Roberto Solimene
Roberto Solimene
2
Istituto di Ricerche sulla Combustione, Consiglio Nazionale delle Ricerche
, Piazzale Vincenzo Tecchio 80, 80125 Napoli (Italy
)
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a)Corresponding author: [email protected]
AIP Conf. Proc. 2126, 210008 (2019)
Citation
Claudio Tregambi, Francesca Di Lauro, Fabio Montagnaro, Piero Salatino, Roberto Solimene; Limestone calcination–carbonation in a fluidized bed reactor/receiver for thermochemical energy storage applications. AIP Conf. Proc. 25 July 2019; 2126 (1): 210008. https://doi.org/10.1063/1.5117757
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