Preparation and characterization of adsorbents/catalysts from forest biomass fly ash

En: 1st Spanish National Conference on Advances in Materials Recycling and Eco – Energy Madrid, 12-13 November 2009.-- Editors: F. A. López, F. Puertas, F. J. Alguacil and A. Guerrero.-- 4 pages, 2 figures, 4 tables.This paper deals with the production of materials, known as adsorbents/catalysts, from forest biomass fly ashes. The ashes were subjected to different pre-treatments to generate two kinds of precursors. Via an agglomerative process using domestic residual oils and a dry sieving method. Both precursors, after an activation process using potassium hydroxide, were characterized in terms of BET surface area. The adsorbent/catalyst obtained from the precursor subjected to dry sieving exhibited a developed porosity, which in turn gave rise to surface areas in the range of 2000m2/g.The group is grateful to ENCE-Navia for financial support under the project PRI-ASTURIAS, PC07-015, 2007-2009.Peer reviewe

Valorization of solid wastes from the leather industry: Preparation of activated carbon by thermochemical processes

En: 1st Spanish National Conference on Advances in Materials Recycling and Eco – Energy Madrid, 12-13 November 2009.-- Editors: F. A. López, F. Puertas, F. J. Alguacil and A. Guerrero.-- 4 pages, 4 tables, 4 figures.A study has been conducted to establish conditions for the pyrolysis of leather wastes (LW) in order to recover gas and condensable fractions. The pyrolized sample was later activated by means of alkaline hydroxides in order to develop its porous structure. The activated carbons prepared are microporous with specific surface area values up to 2700 m2/g.R.R.Gil. is grateful to Miquel Farrés Rojas S.A. for financial support through project PETRI (MICINN, PET2007_0421_02).Peer reviewe

Activated carbons from lignocellulosic wastes from the extraction of tannins

En: 1st Spanish National Conference on Advances in Materials Recycling and Eco – Energy Madrid, 12-13 November 2009.-- Editors: F. A. López, F. Puertas, F. J. Alguacil and A. Guerrero.-- 4 pages, 3 figures, 5 tables.This paper studies the possibility of obtaining activated carbons from lignocellulosic wastes. Three types of residues, obtained from chestnut shells, acacia pods and grape pips, were studied. To achieve our aim, several parameters commonly used in thermo-chemical processes (pyrolysis, alkaline activation) were evaluated: heating rate, final temperature and maintenance time of final temperature in the pyrolysis, final activation temperature, inert gas flow and the ratio between the activating agent and the sample.Peer reviewe