The Calcium-Looping (CaCO3/CaO) process for thermochemical energy storage in Concentrating Solar Power plants

RENEWABLE & SUSTAINABLE ENERGY REVIEWS

卷:113

Review

Ortiz, C.¹  Valverde, J. M.¹  Chacartegui, R.²  Perez-Maqueda, L. A.³  Gimenez, P.² 

[1] Univ Seville, Fac Fis, Ave Reina Mercedes S-N, E-41012 Seville, Spain

[2] Univ Seville, Escuela Tecn Super Ingn, Camino Descubrimientos S-N, Seville 41092, Spain

[3] Univ Seville, CSIC, Inst Ciencia Mat Sevilla, Seville, Spain

关键词: Calcium looping;    Concentrating solar power;    Thermochemical energy storage;    Dispatchability;    Solar tower;    Particle receiver;    Solar calcination;    CaO deactivation;   

DOI  :  10.1016/j.rser.2019.109252

来源: Elsevier

【 摘 要 】

Energy storage based on thermochemical systems is gaining momentum as a potential alternative to molten salts in Concentrating Solar Power (CSP) plants. This work is a detailed review about the promising integration of a CaCO3/CaO based system, the so-called Calcium-Looping (CaL) process, in CSP plants with tower technology. The CaL process relies on low cost, widely available and non-toxic natural materials (such as limestone or dolomite), which are necessary conditions for the commercial expansion of any energy storage technology at large scale. A comprehensive analysis of the advantages and challenges to be faced for the process to reach a commercial scale is carried out. The review includes a deep overview of reaction mechanisms and process integration schemes proposed in the recent literature. Enhancing the multicycle CaO conversion is a major challenge of the CaL process. Many lab-scale analyses carried out show that residual effective CaO conversion is highly dependent on the process conditions and the CaO precursors used, reaching values in a wide range (0.07-0.82). The selection of the optimal operating conditions must be based on materials performance, process integration, technology and economics aspects. Global plant efficiencies over 45% (without considering solar-side losses) show the interest of the technology. Furthermore, the technological maturity and potential of the process is assessed. The direction towards which future works should be headed is discussed.

【 授权许可】

Free