The pore structural characteristics of the liquefied wood-based activated carbon fiber with water steam activations at different activation temperatures and activation times are studied. The pore structure is assessed by N2 adsorption/desorption isotherms at -196℃. The specific surface area and the burnt-off are increased with the increase of the activation temperature or the activation time, and are more dependent on the activation time when activated at higher temperatures. With increasing activation time, the total pore volume and micropore volume are increased more significantly when activated at 750℃ and 800℃, while the mesopore volume is high at the early stage of activations at 650℃ and 700℃ then is decreased, and does not develop until the later stage of activations at 750℃ and 800℃. The pore size distribution analysis indicates that the micropore size distribution becomes increasingly heterogeneous with increasing the activation time under all activation temperatures.
JIN Zhi
,
ZHAO Guangjie
. Pore Structural Characterization of Liquefied Wood-based Activated Carbon Fiber by Water Steam Activation[J]. Science & Technology Review, 2014
, 32(9)
: 26
-30
.
DOI: 10.3981/j.issn.1000-7857.2014.09.003
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