Autor segons l'article: Font, J. Fabregat, A. Fortuny, A. Bengoa, C. Stüber, F. Órfão, J.J.M. Soares, O.S.G.P. Messele, S.A.
Departament: Enginyeria Química
Resum: Zero-valent iron supported catalysts were prepared through modifying an activated carbon (AC) support with different nitrogen containing precursors; (ethylenediamine, urea and melamine) and impregnating it with 3 wt% of iron. The supports were characterized by N2 adsorption at -196 °C, elemental analysis (EA), the pH at the point of zero charge (pHPZC) and temperature programmed desorption (TPD). The iron catalysts were also characterized by temperature programmed reduction (TPR). Subsequently, the catalysts were tested in the adsorption and wet peroxidation of phenol. The results from the different characterization techniques demonstrate that the nitrogen-containing groups are successfully introduced into the carbon surface via all the precursors used. The tests of the different modified carbons as adsorbents/catalysts indicated that the adsorption capacity and the efficiency in phenol oxidation are governed by the specific surface area and functional groups present. Both surface chemistry and textural properties of carbons are influenced by the nitrogen source and the type of oxygen functionalities preexisting on the surface. The modified carbon-supported iron catalysts revealed significantly enhanced phenol removal efficiency, reaching over 85% conversion after 3 h, and showed interesting catalytic stability.
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
Paraula clau altres idiomes: nitrogen surface groups catalytic wet peroxide oxidation surface chemistry Activated carbon Phenol oxidation
ISSN: 1873-3883
Pàgina final: 338
Volum de revista: 154
Versió de l'article dipositat: info:eu-repo/semantics/submittedVersion
URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
Entitat: Universitat Rovira i Virgili.
Any de publicació de la revista: 2014
Pàgina inicial: 329
Repositori URV