KOH-activated rice husk char via CO2 pyrolysis for phenol adsorption

被引：75
作者：
Shen, Yafei [1 ]
Fu, Yuhong [1 ]
机构：
[1] NUIST, Sch Environm Sci & Engn, Jiangsu Key Lab Atmospher Environm Monitoring & P, Nanjing 210044, Jiangsu, Peoples R China
来源：
MATERIALS TODAY ENERGY | 2018年 / 9卷
基金：
中国国家自然科学基金;
关键词：
Rice husk char; KOH activation; CO2; pyrolysis; Phenol; Adsorption; SILICA-DERIVED NANOMATERIALS; HIGH-SURFACE-AREA; BIOMASS PYROLYSIS; AQUEOUS-SOLUTIONS; POROUS CARBON; CHEMICAL ACTIVATION; TAR ELIMINATION; HEAVY-METALS; WASTE-WATER; BIOCHAR;
D O I：
10.1016/j.mtener.2018.07.005
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
This paper comparatively studied the preparation of activated biochar from rice husk (RH) via one-and two-step KOH-catalyzed pyrolysis under the CO2 environment. The one-step pyrolysis can produce a higher yield of activated carbon compared to the two-step pyrolysis. Pore development in the biochar was significantly improved by the de-ashing process integrated with the KOH activation. Additionally, more pores with deep channels were formed on the surface of activated carbon via one-step pyrolysis due to the catalyzed oxidation of carbon structure in the precursor under CO2 environment. Therefore, one-step pyrolysis can produce a relatively higher SBET of biochar compared with two-step pyrolysis. Compared with the activated biochar via two-step pyrolysis, the activated biochar via one-step pyrolysis showed better performance on the phenol adsorption. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码：397 / 405
页数：9
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