Abstract
Starch pyrolysis was carried out in a hot gas stream to establish optimum conditions for the production of levoglucosan. Helium, nitrogen, and steam were used. Steam was most effective and convenient because of its high heat capacity and because it is easily condensed. Yields of levoglucosan increased as pressures decreased. The effect of temperature, feed weight, gas flow rate, reduced air pressure, and catalyst on the yield of levoglucosan is reported. Optimum operating conditions for the acid-catalyzed process were established. A maximum yield of 44.5% levoglucosan was obtained from cornstarch.
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