Influence of the operation conditions on CO2 capture by CaO-derived sorbents prepared from synthetic CaCO3 |
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| Authors: | Alberto J Nieto-Sanchez Mara Olivares-Marin Susana Garcia Covadonga Pevida Eduardo M Cuerda-Correa |
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| Institution: | 1. Department of Organic and Inorganic Chemistry, Faculty of Sciences, University of Extremadura, Avda. de Elvas s/n, E-06071 Badajoz, Spain;2. Instituto de Ciencias de Materiales de Barcelona, ICMAB-CSIC, Campus de la Universitat Autonoma de Barcelona, E-08193 Bellaterra, Spain;3. Instituto Nacional del Carbón, INCAR-CSIC, Apartado 73, E-33080 Oviedo, Spain |
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| Abstract: | In this work, a statistical experimental design is performed in order to prepare CaCO3 materials for use as CaO-based CO2 sorbent precursors. The influence of different operational parameters such as synthesis temperature (ST), stirring rate (SR) and surfactant percent (SP) on CO2 capture is studied by applying Response Surface Methodology (RSM). The samples were characterized using different analytical techniques including X-ray diffraction, N2 adsorption isotherm analysis and Scanning Electron Microscopy–X-ray Energy Dispersive Spectroscopy (SEM-EDX). CO2 capture capacity was determined by means of a thermogravimetric analyzer which recorded the mass uptake of the samples when these were exposed to a gas stream containing diluted (15%) CO2. The statistical approach used in this work provides a rapid way of predicting and optimizing the main preparation variables of CaO-derived sorbents for CO2 sorption. The results obtained clearly indicate that four parameters statistically influence CO2 uptake: SR, the square of SR, its interaction with SP and the square of SP. |
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| Keywords: | CaO-based adsorbents CO2 uptake Response surface methodology Experimental design |
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