Resumo

ACEVEDO, Sergio; GIRALDO, Liliana  e  MORENO, Juan Carlos. Textural and chemical characterization of activated carbon prepared from shell of african palm (Elaeis guineensis) by chemical activation with CaCl₂ and MgCl₂. Rev.Colomb.Quim. [online]. 2015, vol.44, n.3, pp.18-24. ISSN 0120-2804.  https://doi.org/10.15446/rev.colomb.quim.v44n3.55606.

Activated carbons through chemical activation of African palm shells (Elaeis guineensis) with magnesium chloride and calcium chloride solutions at different concentrations were obtained. The prepared materials were characterized textural and chemically. The results show that activated carbons with higher values of surface area and pore volume are obtained when solutions with lower concentrations of the activating agent are used. The obtained activated carbons have surface areas and pore volumes with values between 10 and 501 m²/g and 0.01 and 0.29 cm³/g respectively. Immersion enthalpies values of solids in water were between -14.3 and -32.8 J/g and benzene between -13.9 and -38.6 J/g. Total acidity and basicity of the activated carbons had values between 23 and 262 μmol/g 123 and 1724 μmol/g respectively. pH at the point of zero charge was also determined with values between 4.08 and 9.92 for set of activated carbons . The results show that activation with CaCl₂ and MgCl₂ salts produce activated carbons with pores in the range of mesopores for facilitate entry of the adsorbate into the materials.

Palavras-chave : activated carbon; CaCl₂ solution; MgCl₂ solution; immersion enthalpy.

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