Physics
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003smas...12n..24m&link_type=abstract
Smart Materials and Structures, Volume 12, Issue 6, pp. N24-N28 (2003).
Physics
Scientific paper
There are many known methods for the preparation of activated carbons. They are often classified as chemical and physical activation methods, a division widely used in the scientific literature.
In this paper we study the preparation of activated carbons from different woods (chestnut, cedarwood, walnut) by chemical activation with different concentrations of phosphoric acid (36 and 85 wt%). The prepared activated carbons were characterized by the following techniques: physical adsorption of gases, mercury porosimetry, chemical analysis and measurement of density by helium and mercury displacement.
The main conclusion obtained was that chemical activation with 36 wt% H3PO4 yields activated carbons with better textural properties than those prepared with 85 wt% H3PO4. The effects of activation on the textural properties of the activated carbons improve when the concentration of phosphoric acid is reduced.
Díaz-Díez M. A.
Fernández González M. C.
Gómez-Serrano V.
Macías-García A.
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