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Title: Capture of CO2 by vermiculite impregnated with CaO.
Authors: Pereira, Matheus Henrique Simplício
Santos, Cláudio Gouvêa dos
Lima, Geraldo Magela de
Bruziquesi, Carlos Giovani Oliveira
Oliveira, Victor de Alvarenga
Keywords: Calcium oxide
Issue Date: 2022
Citation: PEREIRA, M. H. S. et al. Capture of CO2 by vermiculite impregnated with CaO. Carbon Management, v. 13, p. 117-126, 2022. Disponível em: <>. Acesso em: 29 abr. 2022.
Abstract: Vermiculite samples were impregnated with different amounts of calcium oxide by the con- ventional thermal heating technique and subject to CO2 capture experiments in thermal analysis equipment. The amount of CO2 captured by calcium oxide increased from 13 g of CO2 per mol of CaO to 16.8 g of CO2 per mol of CaO when the experiments were carried out with pure calcium oxide and vermiculite impregnated with CaO (1:1), respectively. Integral isoconversional methods of Kissinger-Akahira-Sunose (KAS) and Osawa-Flynn-Wall (OFW) were used for the kinetic study of the process and good correlation coefficients were achieved. The apparent activation energy values showed that for low conversions (a < 0.3) the controlling step of the process is a mixed step where the chemical reaction and the dif- fusion of the reagents into the vermiculite have rates of the same order of magnitude (20 kJ < Ea < 40 kJ). For higher conversions values (a > 0.3) the apparent activation energy values suggest that the slow step is a chemical step (Ea> 40 kJ).
ISSN: 1758-3012
metadata.dc.rights.license: This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Fonte: o PDF do artigo.
Appears in Collections:DEMET - Artigos publicados em periódicos

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