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. 2016 Sep 14;2(9):e00155.
doi: 10.1016/j.heliyon.2016.e00155. eCollection 2016 Sep.

Activated carbon from flash pyrolysis of eucalyptus residue

C Grima-Olmedo  1 , Á Ramírez-Gómez  2 , D Gómez-Limón  1 , C Clemente-Jul  1
Affiliations

Activated carbon from flash pyrolysis of eucalyptus residue

C Grima-Olmedo et al. Heliyon. .

Abstract

Forestry waste (eucalyptus sp) was converted into activated carbon by initial flash pyrolysis followed carbonization and CO2 activation. These residues were obtained from a pilot plant in Spain that produces biofuel, the biochar represented 10-15% in weight. It was observed that the highest activation was achieved at a temperature of 800 °C, the specific surface increased with time but, on the contrary, high loss of matter was observed. At 600 °C, although there was an important increase of the specific surface and the volume of micropores, at this temperature it was observed that the activation time was not an influential parameter. Finally, at 400 °C it was observed that the activation process was not very significant. Assessing the average pore diameter it was found that the lowest value corresponded to the activation temperature of 600 °C, which indicated the development of microporosity. When the activation temperature increases up to 800 °C the pore diameter increased developing mesoporosity.

Keywords: Agriculture; Engineering.

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Figures

Fig. 1
Fig. 1
Sketch of the experimental set and description of elements.
Fig. 2
Fig. 2
77 K N2 adsorption-desorption isotherms of active carbons obtained by CO2 activation at different burned levels. (Continuous lines–adsorption and dashed lines–desorption).
Fig. 3
Fig. 3
SEM of a sample prepared by carbonization at 800 °C during 4 h.
Fig. 4
Fig. 4
SEM of a sample activated at 800 °C during 4 h.
See this image and copyright information in PMC

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