Control of the pore size distribution and its spatial homogeneity in particulate activated carbon

Please use this identifier to cite or link to this item:
Información del item - Informació de l'item - Item information
Title: Control of the pore size distribution and its spatial homogeneity in particulate activated carbon
Authors: Hu, Cheng | Sedghi, Saeid | Madani, S. Hadi | Silvestre Albero, Ana | Sakamoto, Hirotoshi | Kwong, Philip | Pendleton, Phillip | Smernik, Ronald J. | Rodríguez Reinoso, Francisco | Kaneko, Katsumi | Biggs, Mark J.
Research Group/s: Materiales Avanzados
Center, Department or Service: Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Pore size distribution | Spatial homogeneity | Activated carbon
Knowledge Area: Química Inorgánica
Issue Date: Nov-2014
Publisher: Elsevier
Citation: Carbon. 2014, 78: 113-120. doi:10.1016/j.carbon.2014.06.054
Abstract: There are circumstances where it is desirable to achieve a particular, optimal, pore size distribution (PSD) in a carbon, including in the molecular sieving, gas storage, CO2-capture and electrochemical energy storage. Activation protocols that cycle a carbon a number of times between a low-temperature oxygen chemisorption process and a higher temperature pyrolysis process have been proposed as a means of yielding such desired PSDs. However, it is shown here that for PFA-based char particles of ∼100 μm in size, only the super-micropores are substantially developed under such an activation protocol, with the ultra-micropores being substantially un-touched. It is also shown that a typical CO2-activation process yields similar control over PSD development. As this process is nearly 15 times faster than the cyclic-O2 protocol and yields larger pore volumes and areas for a given level of conversion, it is to be preferred unless spatial homogeneous porosity within the particles is also desired. If such homogeneity is desired, it is shown here that CO2 activation should continue to be used but at a rate of around one-tenth the typical; this slow rate also has the advantage of producing pore volumes and areas substantially greater than those obtained using the other activation protocols.
Sponsor: CH acknowledges a joint scholarship provided by China Scholarship Council (CSC) and the University of Adelaide. SS acknowledges the award of International Postgraduate Research Scholarship (IPRS) from the University of Adelaide. SHM acknowledges the award of a President’s Scholarship from the University of South Australia. The support of the Australian Research Council Discovery Program (DP110101293) is also gratefully acknowledged.
ISSN: 0008-6223 (Print) | 1873-3891 (Online)
DOI: 10.1016/j.carbon.2014.06.054
Language: eng
Type: info:eu-repo/semantics/article
Peer Review: si
Publisher version:
Appears in Collections:INV - LMA - Artículos de Revistas

Files in This Item:
Files in This Item:
File Description SizeFormat 
Thumbnail2014_Hu_etal_Carbon_final.pdfVersión final (acceso restringido)1,31 MBAdobe PDFOpen    Request a copy
Thumbnail2014_Hu_etal_Carbon.pdfAccepted Manuscript (acceso abierto)2,99 MBAdobe PDFOpen Preview

Items in RUA are protected by copyright, with all rights reserved, unless otherwise indicated.