Artículo
Effect of Steam Injection during Carbonation on the Multicyclic Performance of Limestone (CaCO3) under Different Calcium Looping Conditions: A Comparative Study
Autor/es | Arcenegui Troya, Juan Jesús
Moreno García, Virginia Sánchez Jiménez, Pedro Enrique Perejón Pazo, Antonio Valverde Millán, José Manuel Pérez Maqueda, Luis Allan |
Departamento | Universidad de Sevilla. Departamento de Química Inorgánica Universidad de Sevilla. Departamento de Electrónica y Electromagnetismo |
Fecha de publicación | 2022 |
Fecha de depósito | 2022-03-14 |
Publicado en |
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Resumen | This study explores the effect of steam addition during carbonation on the multicyclic performance of limestone under calcium looping conditions compatible with (i) CO2 capture from postcombustion gases (CCS) and with (ii) ... This study explores the effect of steam addition during carbonation on the multicyclic performance of limestone under calcium looping conditions compatible with (i) CO2 capture from postcombustion gases (CCS) and with (ii) thermochemical energy storage (TCES). Steam injection has been proposed to improve the CO2 uptake capacity of CaO-based sorbents when the calcination and carbonation loops are carried out in CCS conditions: at moderate carbonation temperatures (∼650 °C) under low CO2 concentration (typically ∼15% at atmospheric pressure). However, the recent proposal of calcium-looping as a TCES system for integration into concentrated solar power (CSP) plants has aroused interest in higher carbonation temperatures (∼800–850 °C) in pure CO2. Here, we show that steam benefits the multicyclic behavior in the milder conditions required for CCS. However, at the more aggressive conditions required in TCES, steam essentially has a neutral net effect as the CO2 uptake promoted by the reduced CO2 partial pressure but also is offset by the substantial steam-promoted mineralization in the high temperature range. Finally, we also demonstrate that the carbonation rate depends exclusively on the partial pressure of CO2, regardless of the diluting gas employed. |
Agencias financiadoras | Ministerio de Ciencia, Innovación y Universidades (MICINN). España Junta de Andalucía |
Identificador del proyecto | CTQ2017-83602-C2-1-R and -2-R
P18-FR-1087 and US-1262507 |
Cita | Arcenegui Troya, J.J., Moreno García, V., Sánchez Jiménez, P.E., Perejón Pazo, A., Valverde Millán, J.M. y Pérez Maqueda, L.A. (2022). Effect of Steam Injection during Carbonation on the Multicyclic Performance of Limestone (CaCO3) under Different Calcium Looping Conditions: A Comparative Study. ACS Sustainable Chemistry and Engineering, 10 (2), 850-859. |
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