Please use this identifier to cite or link to this item:

Title: Tailoring carbon gels for their use in the energy sector
Authors: Zubizarreta, L
Aranillas, A
Menéndez, JA
Pis, JA
Carrott, PJM
Conceição, FL
Ribeiro Carrott, MML
Keywords: Chemistry
Issue Date: 2009
Publisher: RSC Publishing
Citation: Tailoring carbon gels for their use in the energy sector, L. Zubizarreta, A. Arenillas, J.A. Menéndez, J.J. Pis, P.J.M. Carrott, F.L. Conceição & M.M.L. Ribeiro Carrott, Characterisation of Porous Solids VIII, S. Kaskel, P. Llewellyn, F. Rodríguez-Reinoso & N.A. Seaton (Eds.), Royal Society of Chemistry, Cambridge, (2009) 142-149
Abstract: A wide range of synthesis conditions and drying methods were used to prepare mesoporous resorcinol-formaldehyde organic gels, and different carbonisation or activation procedures were used in order to produce new carbon gels with controlled microporosity. As is well known, the mesoporosity of the gels is dependent on the synthesis conditions and type of drying. On the other hand, the results presented here indicate that the microporosity generated during carbonisation is not significantly influenced by the synthesis and drying procedures used, but can be significantly improved by resorting to chemical activation. On carbonisation, low micropore volumes and mean pore widths of about 0.25 cm3 g-1 and <1 nm, respectively, are obtained. KOH activation of a previously carbonised gel increased the micropore volume twofold and increased the micropore width from 0.82 to 1.15 nm, while retaining the mesoporosity of the sample. Even larger increases in micropore volume were obtained by KOH or H3PO4 activation of the non-carbonised organic gels, although with the disappearance of mesoporosity. The pore size was also increased, to 1.17 nm and 2.55 nm in the case of KOH and H3PO4, respectively. The work reported here has stated that it is possible to obtain a variety of different carbon xerogels and aerogels with different microporosity and mesoporosity characteristics, by KOH and H3PO4 chemical activation under different conditions.
Type: article
Appears in Collections:CQE - Artigos em Livros de Actas/Proceedings

Files in This Item:

File Description SizeFormat
111_COPS8_2009_142_Tailoring carbon gels for their use in the energy sector.pdf232.23 kBAdobe PDFView/OpenRestrict Access. You can Request a copy!
FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpaceOrkut
Formato BibTex mendeley Endnote Logotipo do DeGóis 

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


Dspace Dspace
DSpace Software, version 1.6.2 Copyright © 2002-2008 MIT and Hewlett-Packard - Feedback
UEvora B-On Curriculum DeGois