Artículo
Calcination under low CO2 pressure enhances the Calcium Looping performance of limestone for thermochemical energy storage
Autor/es | Sarrión Aceytuno, Beatriz
Perejón Pazo, Antonio Sánchez Jiménez, Pedro Enrique Amghar, Nabil Chacartegui, Ricardo Valverde Millán, José Manuel Pérez Maqueda, Luis Allan |
Departamento | Universidad de Sevilla. Departamento de Química Inorgánica Universidad de Sevilla. Departamento de Ingeniería Energética Universidad de Sevilla. Departamento de Electrónica y Electromagnetismo |
Fecha de publicación | 2021 |
Fecha de depósito | 2021-07-19 |
Publicado en |
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Resumen | The Calcium Looping performance of limestone for thermochemical energy storage has been investigated under novel favorable conditions, which involve calcination at moderate temperatures under CO2 at low pressure (0.01 and ... The Calcium Looping performance of limestone for thermochemical energy storage has been investigated under novel favorable conditions, which involve calcination at moderate temperatures under CO2 at low pressure (0.01 and 0.1 bar) and carbonation at high temperature under CO2 at atmospheric pressure. Calcining at low CO2 pressures allows to substantially reduce the temperature to achieve full calcination in short residence times. Moreover, it notably enhances CaO multicycle conversion. The highest values of conversion are obtained for limestone samples calcined under 0.01 bar CO2 at 765 °C. Under these conditions, the residual conversion is increased by a factor of 10 as compared to conditions involving calcination under CO2 at atmospheric pressure. The enhancement of CaO conversion is correlated to the microstructure of the CaO samples obtained after calcination. As seen from SEM, BET surface and XRD analysis, calcination under low CO2 pressure leads to a remarkable decrease of pore volume and CaO crystallite size. Consequently, CaO surface area available for carbonation in the fast reaction-controlled regime and therefore reactivity in short residence times is promoted. |
Agencias financiadoras | Ministerio de Economía y Competitividad (MINECO). España Junta de Andalucía European Union (UE). H2020 |
Identificador del proyecto | CTQ2017-83602-C2-1-R
CTQ2017-83602-C2-2-R 727348, project SOCRATCES US-1262507 |
Cita | Sarrión Aceytuno, B., Perejón Pazo, A., Sánchez Jiménez, P.E., Amghar, N., Chacartegui, R., Valverde Millán, J.M. y Pérez Maqueda, L.A. (2021). Calcination under low CO2 pressure enhances the Calcium Looping performance of limestone for thermochemical energy storage. Chemical Engineering Journal, 417, 127922. |
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