LI Da-Wei, Shu-Ti-Feng. Rice husk-based activated carbons with high mesoporosity prepared by a combination of CO2 activation and boiling in an alkaline solution. New Carbon Mater., 2013, 28(5): 363-368.
Citation:
LI Da-Wei, Shu-Ti-Feng. Rice husk-based activated carbons with high mesoporosity prepared by a combination of CO2 activation and boiling in an alkaline solution. New Carbon Mater., 2013, 28(5): 363-368.
LI Da-Wei, Shu-Ti-Feng. Rice husk-based activated carbons with high mesoporosity prepared by a combination of CO2 activation and boiling in an alkaline solution. New Carbon Mater., 2013, 28(5): 363-368.
Citation:
LI Da-Wei, Shu-Ti-Feng. Rice husk-based activated carbons with high mesoporosity prepared by a combination of CO2 activation and boiling in an alkaline solution. New Carbon Mater., 2013, 28(5): 363-368.
Key Laboratory for Biomass Clean Energy of Anhui Province|University of Science and Technology of China| Hefei 230026,China
Funds:
National Basic Research Program of China (2013CB228103); National Natural Science Foundation of China (50930006); Key Research Program of the Chinese Academy of Sciences (KGZD-EW-304-3).
A combination of CO2 activation and boiling in an alkaline solution was used to prepare highly mesoporous rice husk-based activated carbons. An orthogonal experimental design was used to investigate the effects of CO2 flow rate, CO2 activation time, NaOH concentration, boiling time and liquid/solid ratioon the porosity of the activated carbons. Results show that an activated carbon with a high mesopore volume of 79% can be obtained under optimized conditions with no need for high temperature treatment with NaOH. The specific surface area, pore volume and yield of the activated carbon can reach 899 m2·g-1, 0.783 cm3·g-1 and 26.2%, respectively.