新型炭材料Issue(2)：156-166,11.DOI:10.1016/S1872-5805(15)60181-0
生物质活性炭微孔和中孔结构对CO2吸附性能的影响
Effect of micropore and mesopore structure on CO2 adsorption by activated carbons from biomass
摘要
Abstract
Activated carbons ( ACs) were produced by a one step process with CO2 as the physical activation agent at 800 ℃. The ACs were further activated chemically using KOH, HNO3 or CH3 COOH and heat-treated at 300 or 600℃ for 1 or 2 h to modify their properties. The effect of CO2 concentration, activation time, types of chemical agents and the post heat-treatment conditions on CO2 capture were investigated. Results showed that the optimum conditions for AC production from corn stalks was at 800 ℃ for 30 min with a CO2 concentration of 20% during the physical activation. Chemical agents and further heat-treatment modified the pore structure of the ACs, resulting in a performance improvement for CO2 adsorption. The BET surface area of one sample ( HNO3 activation +100 ℃ water bath 1 h+post heat-treatment at 600℃ for 2 h) was 639. 8 m2/g. The maximum CO2 adsorption capaci-ty of the sample was 7. 33%, which is higher than that of a commercial AC (6. 55%). The CO2 adsorption is dominantly depend-ent on the mesopore volume when the BET surface area is smaller than 500 m2/g while the adsorption is closely associated with mi-cropore area when the BET surface area is larger than 500 m2/g. The adsorption kinetics agreed well with the Bangham kinetic mod-el.关键词
CO2吸附/活性炭/生物质/物理活化/化学活化Key words
CO2 adsorption/Activated carbon/Biomass/Physical activation/Chemical activation分类
化学化工引用本文复制引用
宋涛,廖景明,肖军,沈来宏..生物质活性炭微孔和中孔结构对CO2吸附性能的影响[J].新型炭材料,2015,(2):156-166,11.基金项目
国家重点基础研究发展计划(973计划,2013CB228106,2010CB732206) （973计划,2013CB228106,2010CB732206）
江苏省科技支撑计划(BE2012166).@@@@Special Fund for Major State Basic Research Projects of China (2013CB228106,2010CB732206) （BE2012166）
Key Technolo-gy Research and Development Program of Jiangsu Province of China (BE2012166) （BE2012166）
