新型炭材料2005，Vol.20Issue(3)：198-204,7.
通过再活化浸渍金属盐的活性炭来发展中孔结构
Modification of commercial activated carbon through gasification by impregnated metal salts to develop mesoporous structures
乔文明 1宋燕 1尹圣昊 1持田勲1
作者信息
- 1. 九州大学,先导物质化学研究所,日本,福冈,816-8580
- 折叠
摘要
Abstract
Commercial coconut shell based activated carbon (AC) was used to investigate the production of increased mesoporosity by impregnating with catalytic metal salts such as Fe(NO3)3 and Fe2(SO4)3 followed by CO2 gasification. The salts are found be effective in enlarging the pore size of AC and Fe(NO3)3 is the more effective one to increase pore size and a much larger adsorption capacity (5 -8 times as large as that of as-received AC) and a more rapid adsorption rate for vitamin B12. Three mechanisms are proposed to modify the surface properties and pore size of AC: (1) NOx and SOx liberated from the impregnated salts burn the carbon wall to enlarge pore size; (2) Metal oxide reacts with the carbon wall to enlarge pore size, accompanied by reduction to the corresponding metal; and (3) Metal has a catalytic effect during CO2 gasification of the carbon wall of the AC. Graphitization of the carbon wall caused by metal is also observed. The present modification method is a promising, convenient and cheap way to modify AC to obtain mesopores.关键词
活性炭/中孔结构/气化/吸附Key words
Activated carbon/Mesoporous structure/Gasification/Adsorption分类
化学化工引用本文复制引用
乔文明,宋燕,尹圣昊,持田勲..通过再活化浸渍金属盐的活性炭来发展中孔结构[J].新型炭材料,2005,20(3):198-204,7.
