Southern Research Station

Title: Characterization of liquefied wood residues from different liquefaction conditions

Author: Pan, Hui; Shupe, Todd f.; Hse, Chung-Yun

Date: 2007

Source: Journal of Applied Polymer Science, Vol. 105: 3739-3746

Description: The amount of wood residue is used as a measurement of the extent of wood liquefaction. Characterization of the residue from wood liquefaction provides a new approach to understand some fundamental aspects of the liquefaction reaction. Residues were characterized by wet chemical analyses, Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM). The Klason lignin content of the residues decreased, while the holocellulose and a-cellulose contents increased as the phenol to wood ratio (P/W) increased. A peak at 1735 cm^-1, which was attributed to the ester carbony1 group in xylan, disappeared in the FTIR spectra of the residues from liquefied wood under a sealed reaction system, indicating significantly different effects of atmospheric versus sealed liquefaction. The crystallinity index of the residues was higher than that of the untreated wood particles and slightly increased with an increase in the P/W ratio. The SEM images of the residues showed that the fiber bundles were reduced to small-sized bundles or even single fibers as the P/W ratio increased from 1/1 to 3/1, which indicated that the lignin in the middle lamella had been dissolved prior to the cellulose during liquefaction.

Keywords: wood liquefaction, phenol, residue, chemical analysis, FTIR

View and Print this Publication (1.46 MB)

Pristine Version:  An uncaptured or "pristine" version of this publication is available. It has not been subjected to OCR (Optical Character Recognition) and therefore does not have any errors in the text. However it is a larger file size and some people may experience long download times. The "pristine" version of this publication is available here:

View and Print the PRISTINE copy of this Publication (1.29 MB)

Publication Notes: 

• We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
• This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

 Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

Citation

Pan, Hui; Shupe, Todd f.; Hse, Chung-Yun  2007.  Characterization of liquefied wood residues from different liquefaction conditions.   Journal of Applied Polymer Science, Vol. 105: 3739-3746