By a News Reporter-Staff News Editor at Journal of Engineering -- Investigators publish new report on Chemical Engineering. According to news reporting out of Perth, Australia, by VerticalNews editors, research stated, "The formation of water-soluble intermediates is an important phenomenon during cellulose pyrolysis. This study investigates the evolution of the water-soluble and water-insoluble portions in the solid products during the pyrolysis of an amorphous cellulose sample, which is known to generate substantial amounts of water-soluble intermediates at low temperatures (250 and 300 degrees C)."
Our news journalists obtained a quote from the research from Curtin University, "The yield of the water-soluble portion initially increases to a maximum up to similar to 30% (on a carbon basis), depending on the pyrolysis conditions used in this study. Further pyrolysis reactions lead to a decrease in the yield of the water-soluble portion. In contrast, the yield of the water-insoluble portion initially decreases rapidly as pyrolysis proceeds and then starts to level off. Such leveling-off behavior of the water-insoluble portion indicates that at least part of the water-soluble portion is converted into the water-insoluble portion through repolymerization. An increase in temperature promotes the formation of the water-soluble portion because of the rapid breakage of hydrogen bonds in the pyrolyzing cellulose. The formation of non-sugar structures is accompanied by the evolution of the water-soluble and water-insoluble portions during pyrolysis. At the same conversion level, a higher temperature also results in the formation of more non-sugar structures in the water-soluble portion but fewer non-sugar structures in the water-insoluble portion. Because of the structural changes in both the water-soluble and water-insoluble portions, the selectivities of high-DP anhydro-sugar oligomers in the water-soluble portion decrease as pyrolysis proceeds."
According to the news editors, the research concluded: "Higher temperature promotes the formation of anhydro-sugar oligomers, but reduces the selectivities of low-DP anhydro-sugar oligomers."
For more information on this research see: Evolution of Water-Soluble and Water-Insoluble Portions in the Solid Products from Fast Pyrolysis of Amorphous Cellulose. Industrial & Engineering Chemistry Research, 2013;52(36):12785-12793. Industrial & Engineering Chemistry Research can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Industrial & Engineering Chemistry Research - www.pubs.acs.org/journal/iecred)
Our news journalists report that additional information may be obtained by contacting D.W. Liu, Curtin University, Dept. of Chem Engn, Perth, WA 6845, Australia. Additional authors for this research include Y. Yu and H.W. Wu.
Keywords for this news article include: Perth, Chemical Engineering, Australia and New Zealand
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