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Kinetic and Equilibrium Study of the Adsorption of CO2 in Ultramicropores of Resorcinol-Formaldehyde Aerogels Obtained in Acidic and Basic Medium

1
Departamento de Química, Facultad de Ciencias, Grupo de Investigación en Sólidos Porosos y Calorimetría, Universidad de los Andes, Bogotá 111711, Colombia
2
Departamento de Química, Facultad de Ciencias, Grupo de Calorimetría, Universidad Nacional de Colombia, Bogotá 111321, Colombia
*
Author to whom correspondence should be addressed.
Received: 30 July 2018 / Revised: 7 September 2018 / Accepted: 12 September 2018 / Published: 20 September 2018
In this work, aerogels were prepared using resorcinol-formaldehyde as a precursor in two synthetic routes, one basic and one acidic, to perform the adsorption of CO2 at 0 °C and atmospheric pressure. Aerogels were Characterization by N2 and CO2 Physisorption, Raman Spectroscopy, Scanning Electron Microscopy, and Infrared Spectroscopy. In general, was found that aerogels have a polymeric, disordered, three-dimensional structure and have a microporous surface. Langmuir, Freundlich, Sips and Toth equilibrium models present a good data fit of CO2 adsorption at relative pressure ranging between 1 × 10−4 and 3 × 10−2. The diffusion intra-particle kinetic model explains the setps of this process; the Elovich model also showed a good fit, therefore, there are an energetic heterogeneity of the CO2 superficial adsorption sites. The aerogel carbonized in basic medium at 1050 °C (ACB 1050) material was the best adsorbent of this pollutant, reaching an adsorption capacity of 6.43 mmol g−1. View Full-Text
Keywords: CO2; ultramicropores; aerogels; isotherms; adsorption CO2; ultramicropores; aerogels; isotherms; adsorption
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MDPI and ACS Style

Guarín Romero, J.R.; Moreno-Piraján, J.C.; Giraldo Gutierrez, L. Kinetic and Equilibrium Study of the Adsorption of CO2 in Ultramicropores of Resorcinol-Formaldehyde Aerogels Obtained in Acidic and Basic Medium. C 2018, 4, 52. https://0-doi-org.brum.beds.ac.uk/10.3390/c4040052

AMA Style

Guarín Romero JR, Moreno-Piraján JC, Giraldo Gutierrez L. Kinetic and Equilibrium Study of the Adsorption of CO2 in Ultramicropores of Resorcinol-Formaldehyde Aerogels Obtained in Acidic and Basic Medium. C. 2018; 4(4):52. https://0-doi-org.brum.beds.ac.uk/10.3390/c4040052

Chicago/Turabian Style

Guarín Romero, Jhonatan R., Juan C. Moreno-Piraján, and Liliana Giraldo Gutierrez. 2018. "Kinetic and Equilibrium Study of the Adsorption of CO2 in Ultramicropores of Resorcinol-Formaldehyde Aerogels Obtained in Acidic and Basic Medium" C 4, no. 4: 52. https://0-doi-org.brum.beds.ac.uk/10.3390/c4040052

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