Influence of Fluidised Bed Inventory on the Performance of Limestone Sorbent in Calcium Looping for Thermochemical Energy Storage

Francesca Di Lauro, Claudio Tregambi, Fabio Montagnaro (), Laura Molignano, Piero Salatino and Roberto Solimene
Additional contact information
Francesca Di Lauro: Dipartimento di Scienze Chimiche, Complesso Universitario di Monte Sant’Angelo, Università degli Studi di Napoli Federico II, 80126 Napoli, Italy
Claudio Tregambi: Dipartimento di Ingegneria, Università degli Studi del Sannio, Piazza Roma 21, 82100 Benevento, Italy
Fabio Montagnaro: Dipartimento di Scienze Chimiche, Complesso Universitario di Monte Sant’Angelo, Università degli Studi di Napoli Federico II, 80126 Napoli, Italy
Laura Molignano: Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università degli Studi di Napoli Federico II, Piazzale Tecchio 80, 80125 Napoli, Italy
Piero Salatino: Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università degli Studi di Napoli Federico II, Piazzale Tecchio 80, 80125 Napoli, Italy
Roberto Solimene: Istituto di Scienze e Tecnologie per L’Energia e la Mobilità Sostenibili, Consiglio Nazionale delle Ricerche, Piazzale Tecchio 80, 80125 Napoli, Italy

Energies, 2023, vol. 16, issue 19, 1-19

Abstract: This research work deals with the application of the calcium looping concept for thermochemical energy storage. Experiments were carried out in a lab-scale fluidised bed reactor, which was electrically heated. An Italian limestone (98.5% CaCO 3 , 420–590 ?m) was present in the bed alone, or in combination with silica sand/silicon carbide (this last material was chosen as per its high absorption capacity in the solar spectrum). Calcium looping tests (20 calcination/carbonation cycles) were carried out under operating conditions resembling the “closed-loop” scheme (calcination at 950 °C, carbonation at 850 °C, fluidising atmosphere composed of pure CO 2 in both cases). Carbonation degree, particle size distribution, and particle bulk density were measured as cycles progressed, together with the application of a model equation to relate carbonation degree to the number of cycles. Mutual relationships between the nature of the bed material and possible interactions, the degree of CaO carbonation, the generation of fragments, and changes in particle density and porosity are critically discussed. An investigation of the segregation behaviour of the bed material has been carried out through tests in a devoted fluidisation column, equipped with a needle-type capacitive probe (to measure solid concentration).

Keywords: thermochemical energy storage; fluidised bed; calcium looping; limestone; silicon carbide; segregation; particle size distribution; particle density (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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