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Istituto di ricerche sulla combustione
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Tipo: Articolo in rivista

Titolo: Calcium-looping for thermochemical energy storage in concentrating solar power applications: Evaluation of the effect of acoustic perturbation on the fluidized bed carbonation

Anno di pubblicazione: 2020

Formato: Elettronico

Autori: Raganati, Federica; Chirone, Riccardo; Ammendola, Paola

Affiliazioni autori: Istituto di Ricerche sulla Combustione IRC - CNR

Autori CNR:

  • PAOLA AMMENDOLA
  • RICCARDO CHIRONE
  • FEDERICA RAGANATI

Lingua: inglese

Abstract: In the framework of thermochemical energy storage (TCES) in concentrating solar power (CSP) plants, the calcium-looping (CaL) process, carried out in fluidized bed reactors, is receiving increasing research interest due to the high energy density and the extremely low price, nontoxicity, and wide availability of natural CaO precursors. One of the main open challenges in CaL is represented by finding solutions to the progressive decline in the CaO carbonation conversion with the number of cycles, which is due to the sorbent deactivation caused by sintering and pore-plugging. In this framework, the reduction of the CaO particles size has been reported to improve the carbonation conversion and, therefore, the achievable energy density, by maximizing the availability of the sorbent surface exposed to the gaseous phase and hindering the natural loss of CaO mutlicyclic activity. However, the use of fine particles in fluidized bed reactors is challenging due to agglomeration, channeling and plugging phenomena.

Lingua abstract: inglese

Altro abstract: In this work, the possibility to use a fine natural limestone (< 50 mu m) for CaL at TCES-CSP conditions in a fluidized bed reactor has been investigated for the first time. In particular, sound-assisted fluidization has been proposed as technique to allow the use of such fine particles in fluidized bed reactors, thus overcoming the strict limitation posed by particle size applicable in ordinary fluidized bed reactors. Ordinary and sound-assisted cyclic CaL tests at CSP-TCES operating conditions have been performed in a lab-scale fluidized bed reactor in order to study the influence of the application of high intensity acoustic fields on the carbonation performances. The effect of sound parameters (SPL and frequency) has also been highlighted.

Pagine totali: 11

Rivista:

Chemical engineering journal Elsevier Sequoia
Paese di pubblicazione: Svizzera
Lingua: inglese
ISSN: 1385-8947

Numero volume: 392

DOI: 10.1016/j.cej.2019.123658

Referee: Sė: Internazionale

Stato della pubblicazione: Published version

Indicizzato da:

  • ISI Web of Science (WOS) [000525862500027]
  • Scopus [2-s2.0-85076536433]

Parole chiave:

  • Thermochemical energy storage (TCES)
  • Concentrating solar power (CSP)
  • Fine particles
  • Calcium looping
  • Agglomeration
  • Sound-assisted Fluidization

Strutture CNR:

 
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