Preparation of activated carbon at low carbonization temperatures: utilization of FeCl3 as an alternative activating agent

摘要

Ferric chloride as a new activating agent was used to obtain activated carbons from agroindustrial waste. This material was prepared at three temperatures of pyrolysis, 200, 280 and 400 ?oC. The carbonaceous materials obtained after the activation processes showed high specific surface areas (BET), with values higher than 900 m2 g-1. The materials showed different behaviors in the adsorption of methylene blue dye and reactive red textile dye in water solutions. An important fact in the use of FeCl3 as an activating agent is that the activation temperature is at 280 ?oC, well below of those commonly employed in chemical or physical activations described in the literature.