Artículo
On the relevant role of solids residence time on their CO2 capture performance in the Calcium Looping technology
Autor/es | Perejón Pazo, Antonio
Miranda Pizarro, Juan Pérez Maqueda, Luis Allan Valverde Millán, José Manuel |
Departamento | Universidad de Sevilla. Departamento de Química Inorgánica Universidad de Sevilla. Departamento de Electrónica y Electromagnetismo |
Fecha de publicación | 2016 |
Fecha de depósito | 2018-10-10 |
Publicado en |
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Resumen | The multicycle CO capture performance of CaO derived from natural limestone and dolomite has been investigated by means of thermogravimetry under realistic Calcium-Looping conditions, which necessarily involve high CO ... The multicycle CO capture performance of CaO derived from natural limestone and dolomite has been investigated by means of thermogravimetry under realistic Calcium-Looping conditions, which necessarily involve high CO concentration and high temperatures in the calcination stage and fast transitions between the carbonation and calcination stages. Natural dolomite allows reducing the calcination temperature as compared to limestone while high calcination efficiency is maintained. This could help reducing the energy penalty of the CaL process thus further enhancing the industrial competitiveness for the integration of this technology into fossil fuel power plants. Importantly, the CO capture capacity of the sorbents is critically affected by the solids residence time in the carbonation and calcination stages within the feasible range in practice. Thus, carbonation/calcination residence times play a critical role on the multicycle CO capture performance, which has been generally dismissed in previous studies. A main observation is the enhancement of carbonation in the solid-state diffusion controlled phase, which is against the commonly accepted conception that the only relevant phase in the carbonation stage is the fast reaction-controlled stage on the surface of the solids. Thus, the CO capture efficiency may be significantly enhanced by increasing the solids residence time in the carbonator. |
Agencias financiadoras | Ministerio de Economía y Competitividad (MINECO). España Junta de Andalucía |
Identificador del proyecto | CTQ2014-52763-C2-2-R
CTQ2014-52763-C2-1-R FQM-5735 TEP-7858 |
Cita | Perejón Pazo, A., Miranda Pizarro, J., Pérez Maqueda, L.A. y Valverde Millán, J.M. (2016). On the relevant role of solids residence time on their CO2 capture performance in the Calcium Looping technology. Energy, 113, 160-171. |
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