000			01867nab a2200205 4500
005			20260520000837.0
008			260224s2009 xxu
245	0	0	_aAnalysis of cross-linking behavior during pyrolysis of cellulose for elucidating reaction pathway
260			_a _b _cnov./dic. 2009
270			_a09/06/2010 ; 09/06/2010
300			_a8 p. ; 5765-5772
520			_aTranscripción del resumen del autor. The analyses of structure change during pyrolysis of cellulose at different heating rates were investigated to clarify the existent behavior of the cross-linking reaction. For structural analyses of cellulose precursors, FTIR spectra and XRD patterns confirmed that the dehydration reaction to produce water and cross-liked precursor simultaneously occurred with the glycosidic reaction to produce tar during pyrolysis. On the basis of the assumptions that hydroxyl groups in cellulose converted to water, a new parameter index, so-called the degree of dehydration during pyrolysis, Xp, including its distribution in char (Xc) and tar (Xt), was determined. For the cross-linking analyses at low heating rate, cross-linking reaction may occur until approximately 360 °C where Xc reached its maximum, while the cross-linked tar seems to be released above 360 °C. For tar analyses, cross-linked dimer can be observed for slow pyrolysis, whereas tar products obtained by flash pyrolysis showed relatively higher yield in cellobiosan with no cross-linked volatiles. Finally, based on previous kinetic models, the modified pathway of cellulose pyrolysis was proposed by considering the proposed parameter related to the dehydration.
581			_a6
773	0		_tEnergy & fuels _g23
942			_cARTICULO
100	1		_aChaiwat, Weerawut _942341
100	1		_aHasegawa, Isao _936085
100	1		_aTani, Takaaki _942342
999			_c170816 _d170816