Título A new model of the carbonator reactor in the calcium looping technology for post-combustion CO2 capture
Autores ORTIZ DOMÍNGUEZ, CARLOS, Chacartegui, R. , Valverde, J. M. , Becerra, J. A. , Perez-Maqueda, L. A.
Publicación externa Si
Medio Fuel
Alcance Article
Naturaleza Científica
Cuartil JCR 1
Cuartil SJR 1
Impacto JCR 3.61100
Impacto SJR 1.78100
Fecha de publicacion 15/11/2015
ISI 360710600037
DOI 10.1016/j.fuel.2015.07.095
Abstract The Ca-Looping (CaL) process is considered as a promising technology for CO2 post-combustion capture in power generation plants yielding a minor penalty on plant performance as compared with other capture technologies such as conventional amine-based capture systems. This manuscript presents a new carbonator reactor model based on lab-scale multicyclic CaO conversion results, which take into account realistic CaO regeneration conditions that necessarily involve calcination under high CO2 partial pressure and high temperature. Under these conditions, CaO conversion in the diffusion controlled stage is a relevant contribution to the carbonation degree during typical residence times. The main novelty of the model proposed in the present work is the consideration of the capture efficiency in the diffusion controlled phase of carbonation. It is demonstrated that increasing the residence time by a few minutes in the carbonator yields a significant improvement of the capture efficiency. Model predictions are shown to agree with experimental results retrieved from pilot-scale tests. The new model allows a more accurate evaluation and prediction of carbonator\'s performance over a wider range of residence times. The results obtained may be relevant for the optimization of CaL operation parameters to be used in real power plants. (C) 2015 Elsevier Ltd. All rights reserved.
Palabras clave CO2 capture; Ca-looping; Limestone calcination; Diffusion phase; Calcium looping; Carbon dioxide capture
Miembros de la Universidad Loyola

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