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

页码：2707 / 2709

页数：3

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