Resumo

GIRALDO, Liliana  e  MORENO-PIRAJAN, Juan C. MONOLITHS OF ACTIVATED CARBON FROM COCONUT SHELL AND IMPREGNATION WITH NICKEL AND COPPER. Rev.Colomb.Quim. [online]. 2008, vol.37, n.3, pp.355-370. ISSN 0120-2804.

A series of different monoliths of activated carbon were prepared from coconutshell by means of chemical activation with phosphoric acid at different concentrations without using binders or plastificantes. The monolith that developed the biggest surface area was impregnated by humidic route with solutions of Ni and Cu at diferents molar relations. The structures were characterized by N2 adsorption at 77 K, and the morphology was explored by means of scanning electron microscopy. The carbonaceous materials obtained, Nikel-Copper-Monolithe, were analyzed by Thermal Programmed Reduction (TPR). The experimental results indicated that the activation with the acid generated a microporosity, with micropores volume between 0.40 and 0.81 cm3g-1 and surface areas between 703 and 1450 m2g-1, and a good mechanical properties. It shows that, both the copper and the nickel, are fixed to the monolith and TPR’s results are interpreted when these molar relation are modified.

Palavras-chave : monoliths; chemichal activation; impregnated materials; scanning electron Microscope; adsorption isotherms.

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