Effects of Heating rate on Yield of Levoglucosan in Wood Pyrolysis.

The yield of levoglucosan (LG : a kind of anhydrosugar) from wood particles by pyrolysis was studied using an infrared-ray furnace under various heating rates.A slight reduction of pressure was found to increase the yield of levoglucosan. The increase of heating rate resulted in an increase in the yield of levoglucosan and a decrease in the yield of solid product, as was the case for the reduction of pressure. However, at an extremely high heating rate, the yield of levoglucosan decreased. As a result of pyrolysis of Karamatsu under 88 kPa, the maximum yield of levoglucosan was obtained at a heating rate of nearly 1.3 K/s.