Microwave-assisted hydrothermal carbonization of lignocellulosic materials

被引：71
|
作者：
Guiotoku, M. [1 ]
Rambo, C. R. [2 ]
Hansel, F. A. [1 ]
Magalhaes, W. L. E. [1 ]
Hotza, D. [2 ]
机构：
[1] EMBRAPA Natl Ctr Forest Res, Colombo, PR, Brazil
[2] Univ Fed Santa Catarina, Grp Ceram & Glass Mat CERMAT, Dept Chem Engn EQA, Florianopolis, SC, Brazil
来源：
MATERIALS LETTERS | 2009年 / 63卷 / 30期
关键词：
Characterization methods; Surfaces; Microstructure; Microwave; Hydrothermal carbonization; Cellulose; PLANT-MATERIAL; BIOMASS; TECHNOLOGY; CARBONS; SYSTEM; PHASE;
D O I：
10.1016/j.matlet.2009.09.049
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A new microwave-assisted hydrothermal carbonization (MAHC) method is reported in this work. The process uses microwave heating at 200 degrees C in acidic aqueous media to carbonize pine sawdust (Pinus sp.) and alpha-cellulose (Solucell (R)) at three different reaction times. Elemental analysis showed that the lignocellulosic samples subjected to MAHC yielded carbon-enriched material 50% higher than raw materials. Increase in aromaticity was confirmed by a van Krevelen diagram. SEM micrographs detected no morphological changes in pine sawdust. In contrast, SEM micrographs of carbonized alpha-cellulose revealed spherical-shaped particles with diameters ranging from 1 to 2 pm. These results showed that microwave-assisted hydrothermal carbonization is an innovative approach to obtain carbonized lignocellulosic materials. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：2707 / 2709
页数：3
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