Enthalpic characterization of activated carbons obtained from <Emphasis Type="Italic">Mucuna Mutisiana</Emphasis> with different burn-offs |
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Authors: | J E Vargas L Giraldo J C Moreno-Piraján |
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Institution: | 1.Departamento de Química, Facultad de Ciencias,Universidad Nacional de Colombia,Bogota,Colombia;2.Grupo de Investigación en Sólidos Porosos y Calorimetría. Departamento de Química, Facultad de Ciencias,Universidad de los Andes,Bogota,Colombia |
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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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