Activated carbon from chickpea husk by chemical activation with K2CO3:: preparation and characterization

被引:96
作者
Hayashi, J
Horikawa, T
Muroyama, K
Gomes, VG
机构
[1] Kansai Univ, Dept Chem Engn, Suira, Osaka 5648680, Japan
[2] Univ Sydney, Dept Chem Engn, Sydney, NSW 2006, Australia
关键词
activated carbon; chemical activation; fractal dimension; potassium carbonate; waste utilization;
D O I
10.1016/S1387-1811(02)00406-7
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Activated carbon was prepared from chickpea husk by chemical activation with K2CO3. At 1073 K, the specific surface area of activated carbon prepared with an impregnation ratio of 1.0 yielded the maximum value of 1778 m(2)/g. From the results of the yield of the activated carbon and the reagent recovery ratio, it was concluded that-the carbon involved in the husk char was removed as CO by reduction of K2CO3 above 1000 K. The fractal dimension changed slightly between 773 and 973 K, and it decreased rapidly between 973 and 1173 K. It was deduced that this decrease of the fractal dimension was due to the decomposition of the cross-linked structure and the small crystallite structure. The micropore volume and the specific surface area increased by the release of plugged pore due to the decomposition of the cross-linked structure. It was further deduced that the mesopore volume increased and the micropore volume decreased by combination of micropores due to the decomposition of small crystallites. (C) 2002 Elsevier Science Inc. All rights reserved.
引用
收藏
页码:63 / 68
页数:6
相关论文
共 33 条
[1]   Production of granular activated carbons from select agricultural by-products and evaluation of their physical, chemical and adsorption properties [J].
Ahmedna, M ;
Marshall, WE ;
Rao, RM .
BIORESOURCE TECHNOLOGY, 2000, 71 (02) :113-123
[2]  
BOTA A, 1997, CHEM ENG, V41, P25
[3]  
BOTHA FD, 1993, ADSORPTION SCI TECHN, V10, P181
[4]   PREPARATION OF ACTIVATED CARBON BY CHEMICAL ACTIVATION WITH ZNCL2 [J].
CATURLA, F ;
MOLINASABIO, M ;
RODRIGUEZREINOSO, F .
CARBON, 1991, 29 (07) :999-1007
[5]   On surface of micropores and fractal dimension of activated carbon determined on the basis of adsorption and SAXS investigations [J].
Diduszko, R ;
Swiatkowski, A ;
Trznadel, BJ .
CARBON, 2000, 38 (08) :1153-1162
[6]   The production of chemically-activated carbon [J].
Evans, MJB ;
Halliop, E ;
McDonald, JAF .
CARBON, 1999, 37 (02) :269-274
[7]   PHYSICAL ADSORPTION ON NON-UNIFORM SURFACES [J].
HALSEY, G .
JOURNAL OF CHEMICAL PHYSICS, 1948, 16 (10) :931-937
[8]   Preparation of activated carbon from lignin by chemical activation [J].
Hayashi, J ;
Kazehaya, A ;
Muroyama, K ;
Watkinson, AP .
CARBON, 2000, 38 (13) :1873-1878
[9]   Preparation of high-surface-area activated carbons from coconut shell [J].
Hu, ZH ;
Srinivasan, MP .
MICROPOROUS AND MESOPOROUS MATERIALS, 1999, 27 (01) :11-18
[10]   Activated carbon from an agricultural by-product, for the treatment of dyeing industry wastewater [J].
Kadirvelu, K ;
Palanival, M ;
Kalpana, R ;
Rajeswari, S .
BIORESOURCE TECHNOLOGY, 2000, 74 (03) :263-265