2-Steps KOH activation of rice straw: An efficient method for preparing high-performance activated carbons

被引：259

作者：

Basta, A. H. ^{[2
]}

Fierro, V. ^{[1
]}

Ei-Saied, H. ^{[2
]}

Celzard, A. ^{[1
,3
]}

机构：

[1] Nancy Univ, UPV Metz, Fac Sci & Tech, Inst Jean Lamour,CNRS,Dept 2,UMR 7198, F-54506 Vandoeuvre Les Nancy, France

[2] Natl Res Ctr, Cellulose & Paper Dept, Cairo 12622, Egypt

[3] Nancy Univ, UPV Metz, ENSTIB, Inst Jean Lamour,CNRS,Dept 2,UMR 7198, F-88051 Epinal 9, France

来源：

BIORESOURCE TECHNOLOGY | 2009年 / 100卷 / 17期

关键词：

Rice straw; De-ashing; Activated carbon; KOH; Adsorption; AGRICULTURAL BY-PRODUCTS; SURFACE-AREA; ADSORPTION; ADSORBENTS; POROSITY; COALS;

D O I：

10.1016/j.biortech.2009.02.028

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Effects of both pre-treatment and number of steps in KOH activation of raw rice straw (RS) on textural and adsorption properties of RS-derived activated carbons (ACs) were investigated. Three pre-treatment protocols were tested: mechanical, chemical by NaOH pulping, and a combination of both. Activation of RS-based materials was investigated, at a constant temperature of 800 degrees C, according to two ways: a 1-step simultaneous carbonisation-activation with KOH, and a 2-steps process: carbonisation followed by activation by KOH. 2-Steps KOH activation was more efficient in producing activated carbons with high surface areas and high methylene blue adsorption than 1-step KOH activation. Additionally, 2-steps KOH activation increased the yield of activated carbons having moderate ash content (8-14%). Surface areas as high as 1917 m(2)/g were obtained when the combined mechanical-chemical pre-treatment method and a 2-steps activation process were carried out (C) 2009 Elsevier Ltd. All rights reserved

引用

页码：3941 / 3947

页数：7

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