Enthalpic characterization of activated carbons obtained from Mucuna Mutisiana with different burn-offs

Author: Vargas J.   Giraldo L.   Moreno-Piraján J.  

Publisher: Springer Publishing Company

ISSN: 1388-6150

Source: Journal of Thermal Analysis and Calorimetry, Vol.102, Iss.3, 2010-12, pp. : 1105-1109

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Abstract

Immersion enthalpies of activated carbon samples obtained by activation with steam at temperatures between 600 and 900 °C and activation times between 1 and 10 h were determined. The calorimetric liquids of immersion are CCl4, water, NaOH, and HCl 2 M solutions, and the values of the immersion enthalpies are related to other properties of the activated carbons such as the surface area B.E.T., the micropore volume, the content of acid, and basic surface groups. The highest values for the immersion enthalpies take place for the polar solvent CCl4 and for HCl solution, with values between 4.0 and 75.2 J g−1 and 9.15 and 48.3 J g−1, respectively.

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