Activation of a spherical carbon for toluene adsorption at low concentration

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Title: Activation of a spherical carbon for toluene adsorption at low concentration
Authors: Romero Anaya, Aroldo José | Lillo-Rodenas, Maria Angeles | Linares-Solano, Angel
Research Group/s: Materiales Carbonosos y Medio Ambiente
Center, Department or Service: Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Toluene adsorption | Spherical carbon | Low concentration
Knowledge Area: Química Inorgánica
Issue Date: 2-Jun-2014
Publisher: Elsevier
Citation: Carbon. 2014, Accepted Manuscript. doi:10.1016/j.carbon.2014.05.066
Abstract: This paper complements a previous one [1] about toluene adsorption on a commercial spherical activated carbon and on samples obtained from it by CO2 or steam activation. The present paper deals with the activation of a commercial spherical carbon (SC) having low porosity and high bed density (0.85 g/cm3) using the same procedure. Our results show that SC can be well activated with CO2 or steam. The increase in the burn-off percentage leads to an increase in the gravimetric adsorption capacity (more intensively for CO2) and a decrease in bed density (more intensively for CO2). However, for similar porosity developments similar bed densities are achieved for CO2 and steam. Especial attention is paid to differences between both activating agents, comparing samples having similar or different activation rates, showing that CO2 generates more narrow porosity and penetrates more inside the spherical particles than steam. Steam activates more from the outside to the interior of the spheres and hence produces larger spheres size reductions. With both activation agents and with a suitable combination of porosity development and bed density, quite high volumetric adsorption values of toluene (up to 236 g toluene/L) can be obtained even using a low toluene concentration (200 ppmv).
Sponsor: Generalitat Valenciana (Prometeo/2009/047 and FEDER), MICINN and plan E (CTQ2012-3176) and MINECO (MAT-2012-32832).
ISSN: 0008-6223 (Print) | 1873-3891 (Online)
DOI: 10.1016/j.carbon.2014.05.066
Language: eng
Type: info:eu-repo/semantics/article
Peer Review: si
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Appears in Collections:INV - MCMA - Artículos de Revistas

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