Journal
BIOMASS & BIOENERGY
Volume 46, Issue -, Pages 145-154Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.biombioe.2012.09.010
Keywords
Wood wastes; Activated carbon; Response surface methodology; Supercapacitor; CO2 capture
Funding
- European Community [203459]
- Latvian Budget [1546]
- Latvian National Programme VPP-2,2.4,1.1
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Highly porous carbons were obtained from solid wastes generated in the chemical and the mechanical processing of birch wood (substandard kraft cellulose, hydrolysis lignin, chips and bark). NaOH-chemical activation of these residues at 575-800 degrees C resulted in an efficient process to produce carbons with specific surface areas well above 1000 m(2) g (1) and average pore widths of 1-1.7 nm. Comparative evaluations have shown the potentiality of wood wastes-based carbons in applications related to environmental protection. Activated carbons derived from chips- and bark-birch wood displayed specific capacitances as high as 308 F g (1) in the H2SO4 aqueous electrolyte and 200 F g (1) in the (C2H5)(4)NBF4/acetonitrile organic medium. Moreover, their capacitive performance at high current density competed well with that found for commercial carbons used in supercapacitors. Wood-derived carbons also proved to be highly promising for CO2 capture in power stations, achieving uptakes under post- and pre-combustion conditions of 11-16 wt.% and 49-91 wt.%, respectively. (C) 2012 Elsevier Ltd. All rights reserved.
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