Article
Use of steel slag for CO2 capture under realistic calcium-looping conditions
Author/s | Miranda Pizarro, Juan
Perejón Pazo, Antonio Valverde Millán, José Manuel Sánchez Jiménez, Pedro Enrique Pérez Maqueda, Luis Allan |
Department | Universidad de Sevilla. Departamento de Electromagnética y Electromagnetismo Universidad de Sevilla. Departamento de Química Inorgánica |
Publication Date | 2016 |
Deposit Date | 2018-03-23 |
Published in |
|
Abstract | In this study, CaO derived from steel slag pretreated with diluted acetic acid has been tested as a dry sorbent for CO capture under realistic Ca-Looping (CaL) conditions, which necessarily implies calcination under high ... In this study, CaO derived from steel slag pretreated with diluted acetic acid has been tested as a dry sorbent for CO capture under realistic Ca-Looping (CaL) conditions, which necessarily implies calcination under high CO partial pressure and fast transitions between carbonation and calcination stages. The multicycle capture performance of the sorbent has been investigated by varying the precalcination time, carbonation/calcination residence times and with the introduction of a recarbonation stage. Results show that the sorbent can be regenerated in very short residence times at 900 °C under high CO partial pressure, thus reducing the calciner temperature by about 30-50 °C when compared to limestone. Although the introduction of a recarbonation stage to reactivate the sorbent, as suggested in previous studies for limestone, results in a slightly enhanced capture capacity, the sorbent performance can be significantly improved if the main role of the solid-state diffusion-controlled carbonation is not dismissed. Thus, a notable enhancement of the capture capacity is achieved when the carbonation residence time is prolonged beyond just a few minutes, which suggests a critical effect of solids residence time in the carbonator on the CO capture efficiency of the CaL process when integrated into a power plant. |
Funding agencies | Ministerio de Economía y Competitividad (MINECO). España Junta de Andalucía |
Project ID. | CTQ2014-52763- C2-2-R
CTQ2014-52763-C2-1-R FQM-5735 TEP-7858 |
Citation | Miranda Pizarro, J., Perejón Pazo, A., Valverde Millán, J.M., Sánchez Jiménez, P.E. y Pérez Maqueda, L.A. (2016). Use of steel slag for CO2 capture under realistic calcium-looping conditions. RSC Advances, 6, 37656-37663. |
Files | Size | Format | View | Description |
---|---|---|---|---|
Use of steel sleg for CO2.pdf | 1.118Mb | [PDF] | View/ | |