POWDERED ACTIVATED CARBONS FROM PINUS CARIBAEA SAWDUST
- 9 November 2001
- journal article
- Published by Taylor & Francis in Separation Science and Technology
- Vol. 36 (14) , 3191-3206
- https://doi.org/10.1081/ss-100107767
Abstract
Activated carbons with different porous structures have been prepared from Pinus caribaea sawdust through the use of CO2 and steam as activating agents. The evolution of the Brunauer-Emmett-Teller (BET) surface area upon activation becomes fairly similar in both cases, and values above 1000 m2/g can be reached at high burn-off levels. Activation with steam produces a more developed porous structure, with a substantially higher contribution of mesoporosity, than does activation with CO2. Increasing the activation temperature leads in both cases to a wide pore-size distribution. The presence of a well-developed mesoporosity makes the resulting products good candidates for adsorbents for water and waste-water treatment. For these purposes, the characteristics of these activated carbons are comparable to those used as commercial adsorbents in those fields, showing in the case of the steam-activated carbons, a somewhat higher mesopore volume than many of the commercial products while maintaining similar surfac...Keywords
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