Micro/Mesoporous Activated Carbons Derived from Polyaniline: Promising Candidates for CO2 Adsorption

Please use this identifier to cite or link to this item: http://hdl.handle.net/10045/46289
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Title: Micro/Mesoporous Activated Carbons Derived from Polyaniline: Promising Candidates for CO2 Adsorption
Authors: Silvestre Albero, Ana | Silvestre-Albero, Joaquín | Martinez-Escandell, Manuel | Rodríguez Reinoso, Francisco
Research Group/s: Materiales Avanzados
Center, Department or Service: Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Activated carbons | Polyaniline | CO2 adsorption
Knowledge Area: Química Inorgánica
Issue Date: 6-Jun-2014
Publisher: American Chemical Society
Citation: Industrial & Engineering Chemistry Research. 2014, 53(40): 15398-15405. doi:10.1021/ie5013129
Abstract: A series of activated carbons were prepared by carbonization of polyaniline at different temperatures, using KOH or K2CO3 as activating agent. Pure microporous or micro/mesoporous activated carbons were obtained depending on the preparation conditions. Carbonization temperature has been proven to be a key parameter to define the textural properties of the carbon when using KOH. Low carbonization temperatures (400–650 °C) yield materials with a highly developed micro- and mesoporous structure, whereas high temperatures (800 °C) yield microporous carbons. Some of the materials prepared using KOH exhibit a BET surface area superior to 4000 m2/g, with total pore volume exceeding 2.5 cm3/g, which are among the largest found for activated carbons. On the other hand, microporous materials are obtained when using K2CO3, independently of carbonization temperature. Some of the materials were tested for CO2 capture due to their high microporosity and N content. The adsorption capacity for CO2 at atmospheric pressure and 0 °C achieves a value of ∼7.6 mmol CO2/g, which is among the largest reported in the literature. This study provides guidelines for the design of activated carbons with a proper N/C ratio for CO2 capture at atmospheric pressure.
Sponsor: Authors acknowledge financial support from BroadBit industry (BroadBit Slovakia s.r.o. Eötvösova ul. 12. 945 01, Komárno, Slovakia).
URI: http://hdl.handle.net/10045/46289
ISSN: 0888-5885 (Print) | 1520-5045 (Online)
DOI: 10.1021/ie5013129
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2014 American Chemical Society
Peer Review: si
Publisher version: http://dx.doi.org/10.1021/ie5013129
Appears in Collections:INV - LMA - Artículos de Revistas

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