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Preparation and characterization of activated carbons from eucalyptus kraft lignin

✍ Scribed by J. Rodríguez-Mirasol; T. Cordero; J.J. Rodríguez

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
731 KB
Volume
31
Category
Article
ISSN
0008-6223

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✦ Synopsis

Preparation of activated carbons from eucalyptus kraft lignin has been investigated. A pretreatment method has been established to avoid partial fusion and swelling in the carbonization stage. Carbonization has been studied at different temperatures and the structure of the microporous chars has been characterized. Activated carbons have been prepared from CO1 partial gasification of chars obtained at 823 and 107 3 K. Both chars show a comparable behavior regarding to the evolution ofporous structure. Activation increases both total and narrow microporosity and develops a substantial mesoporosity. At high burnoff levels, macroporosity becomes also significant. BET surface areas in the vicinity of I ,300-1,400 m2/g have been achieved at burnoff levels around 70-7596 which correspond to overall carbon to lignin yields of about IO%-1 I % (d.a.f. basis).

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