01329naa a2200181 a 450000100080000000500110000800800410001910000170006024501030007726000090018052008170018965300180100670000170102470000180104170000240105970000140108377300500109715742322015-02-24       2009    bl uuuu     u00u1 u    #d1 aGUIOTOKU, M.  aMicrowave-assisted hydrothermal carbonization of lignocellulosic materials.h[electronic resource]  c2009  aA new microwave-assisted hydrothermal carbonization (MAHC) method is reported in this work. The process uses microwave heating at 200 °C in acidic aqueous media to carbonize pine sawdust (Pinus sp.) and ?-cellulose (Solucell®) 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 ?-cellulose revealed spherical-shaped particles with diameters ranging from 1 to 2 ?m. These results showed that microwave-assisted hydrothermal carbonization is an innovative approach to obtain carbonized lignocellulosic materials.  aLignocelulose1 aRAMBO, C. R.1 aHANSEL, F. A.1 aMAGALHAES, W. L. E.1 aHOTZA, D.  tMaterials Lettersgv. 63, p. 2707-2709, 2009.