Preparation of high metal content nanoporous carbon

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Title: Preparation of high metal content nanoporous carbon
Authors: Molina Sabio, Miguel | Castro, Mateus Carvalho Monteiro de | 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: KOH activation | Mesophase pitch | Porosity
Knowledge Area: Química Inorgánica
Issue Date: Nov-2013
Publisher: Elsevier
Citation: Fuel Processing Technology. 2013, 115: 115-121. doi:10.1016/j.fuproc.2013.04.015
Abstract: Activated carbons with high metal content have been prepared by the pyrolysis of ethylene tar with dissolved metal acetylacetonates (Ti, V, Fe, Co, Ni and Cu) and subsequent activation with KOH of the pitch obtained in pyrolysis. These metal compounds decompose during the pyrolysis of ethylene tar yielding metal nanoparticles formed by metal and/or oxide which are homogeneously distributed in the pitch and remain in the activated carbon, so that the concentration of metal is, in most cases, 4–5 times higher than in the pristine ethylene tar. Since KOH is an effective activating agent, all activated carbons combine a high porosity development with a high metal content. In some of the carbons, such as P2FeA (3.3% Fe, pore volume 1.84 cm3/g, BET surface area 3270 m2/g), there is even an increase in the pore volume when compared to the activated carbon prepared in the same way without metal, in spite of the fact that the metal increases the weight of carbon without contributing to the adsorptive capacity. It seems that iron, on the one hand modifies the pyrolysis to give a pitch with larger mesophase content and on the other hand it locally catalyzes carbon gasification with the CO2 produced along the synthesis of the carbon. In addition to its influence on activation, iron promotes the formation of graphitic carbon fibers.
Sponsor: This work has been supported by the Spanish Ministerio de Ciencia e Innovación, Projects MAT2007-61734, FEDER funds, and PLE-2009-0052.
ISSN: 0378-3820 (Print) | 1873-7188 (Online)
DOI: 10.1016/j.fuproc.2013.04.015
Language: eng
Type: info:eu-repo/semantics/article
Peer Review: si
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Appears in Collections:INV - LMA - Artículos de Revistas

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