Preparation and formation mechanism of levoglucosan from starch using a tubular furnace pyrolysis reactor
2013
Yang, Zhiguang | Liu, Xueping | Yang, Zhidong | Zhuang, Guoqiang | Bai, Zhihui | Zhang, Hongxun | Guo, Yifei
Tubular furnace pyrolysis reactor for the production of organic liquids from biomass has been demonstrated at a pilot-scale of 500g/batch of dry feed at a temperature of 360–420°C. Treatment of starch gives high yields of 1,6-anhydro-β-d-glucopyranose (levoglucosan, LG). The yield depends on the heater temperature and the vacuum pressure in the reactor. The maximum yield of levoglucosan from corn starch is about 56% (analytical value) at ultimate pressure of 6×10⁻²Pa, pumping speed of 15L/s and temperature of 390°C. Under the same conditions, the products of levoglucosan pyrolysis are exactly the same as starch pyrolysis. Based on these experimental results and further thermal analysis, a new pyrolysis mechanism is provided and discussed.
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