Upgrading the rice husk char obtained by flash pyrolysis for the production of amorphous silica and high quality activated carbon

被引：129

作者：

Alvarez, Jon ^{[1
]}

Lopez, Gartzen ^{[1
]}

Amutio, Maider ^{[1
]}

Bilbao, Javier ^{[1
]}

Olazar, Martin ^{[1
]}

机构：

[1] Univ Basque Country UPV EHU, Dept Chem Engn, E-48080 Bilbao, Spain

来源：

BIORESOURCE TECHNOLOGY | 2014年 / 170卷

关键词：

Activated carbon; Char; Rice husks; Steam activation; Adsorbent; AGRICULTURAL RESIDUES; RAPID PYROLYSIS; ASH; BIOMASS; ADSORPTION; PRECURSORS; EVOLUTION; STRENGTH; CATALYST; POROSITY;

D O I：

10.1016/j.biortech.2014.07.073

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The overall valorization of rice husk char obtained by flash pyrolysis in a conical spouted bed reactor (CSBR) has been studied in a two-step process. Thus, silica has been recovered in a first step and the remaining carbon material has been subjected to steam activation. The char samples used in this study have been obtained by continuous flash pyrolysis in a conical spouted bed reactor at 500 degrees C. Extraction with Na2CO3 allows recovering 88% of the silica contained in the rice husk char. Activation of the silica-free rice husk char has been carried out in a fixed bed reactor at 800 degrees C using steam as activating agent. The porous structure of the activated carbons produced includes a combination of micropores and mesopores, with a BET surface area of up to 1365 m(2) g(-1) at the end of 15 min. (C) 2014 Elsevier Ltd. All rights reserved.

引用

收藏

页码：132 / 137

页数：6

相关论文

共 35 条

[11] Utilization of rice husks as a feedstock for preparation of activated carbon by microwave induced KOH and K2CO3 activation [J].

Foo, K. Y. ;

Hameed, B. H. .

BIORESOURCE TECHNOLOGY, 2011, 102 (20) :9814-9817

[12] Evolution of char structure during steam gasification of the chars produced from rapid pyrolysis of rice husk [J].

Fu, Peng ;

Hu, Song ;

Xiang, Jun ;

Yi, Weiming ;

Bai, Xueyuan ;

Sun, Lushi ;

Su, Sheng .

BIORESOURCE TECHNOLOGY, 2012, 114 :691-697

[13] Rice husk ash blended cement: Assessment of optimal level of replacement for strength and permeability properties of concrete [J].

Ganesan, K. ;

Rajagopal, K. ;

Thangavel, K. .

CONSTRUCTION AND BUILDING MATERIALS, 2008, 22 (08) :1675-1683

[14] RETRACTED: Assessment of the effects of rice husk ash particle size on strength, water permeability and workability of binary blended concrete (Retracted article. See vol. 57, pg. 173, 2023) [J].

Givi, Alireza Naji ;

Rashid, Suraya Abdul ;

Aziz, Farah Nora A. ;

Salleh, Mohamad Amran Mohd .

CONSTRUCTION AND BUILDING MATERIALS, 2010, 24 (11) :2145-2150

[15] The preparation and mechanism studies of rice husk based porous carbon [J].

Guo, YP ;

Yang, SF ;

Yu, KF ;

Zhao, JZ ;

Wang, ZC ;

Xu, HD .

MATERIALS CHEMISTRY AND PHYSICS, 2002, 74 (03) :320-323

[16] Preparation of Activated Carbons from Raw and Biotreated Agricultural Residues for Removal of Volatile Organic Compounds [J].

Hsi, Hsing-Cheng ;

Horng, Richard S. ;

Pan, Tai-An ;

Lee, Shin-Ku .

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 2011, 61 (05) :543-551

[17] Development of low-concentration mercury adsorbents from biohydrogen-generation agricultural residues using sulfur impregnation [J].

Hsi, Hsing-Chengi ;

Tsai, Cheng-Yen ;

Kuo, Tien-Ho ;

Chiang, Cheng-Sheng .

BIORESOURCE TECHNOLOGY, 2011, 102 (16) :7470-7477

[18] Characterization of char from rapid pyrolysis of rice husk [J].

Hu, Song ;

Xiang, Jun ;

Sun, Lushi ;

Xu, Minhou ;

Qiu, Jianrong ;

Fu, Peng .

FUEL PROCESSING TECHNOLOGY, 2008, 89 (11) :1096-1105

[19] Agricultural residues as precursors for activated carbon production - A review [J].

Ioannidou, O. ;

Zabaniotou, A. .

RENEWABLE & SUSTAINABLE ENERGY REVIEWS, 2007, 11 (09) :1966-2005

[20] Preparation of activated carbons from agricultural residues for pesticide adsorption [J].

Ioannidou, Ourania A. ;

Zabaniotou, Anastasia A. ;

Stavropoulos, George G. ;

Islam, Md. Azharul ;

Albanis, Triantafyllos A. .

CHEMOSPHERE, 2010, 80 (11) :1328-1336

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