3-5-2 木材多糖熱分解物のガス化特性(3-5 熱分解1,Session 3 バイオマス等,研究発表)

概要

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The gasification behaviors of 8 kinds of volatiles [levoglucosan, glycolaldehyde, hydroxyacetone, furfural, 5-hydroxymethylfurfural (5-HMF), acetic acid, formic acid and methanol], which are known as primary products in cellulose pyrolysis, were studied under the conditions of 500-600°C/ 10 min/ N_2 or N_2 +O_2 (1/3 amount of complete combustion) atmosphere. Coke and gas formation behaviors were quite different depending on the chemical structures. Levoglucosan and glycolaldehyde formed coke only in liquid-phase, while coke formation from furfural and 5-HMF was effective also in vapor. Other compounds did not form coke. Gas formation reactivity and gas composition were identified for each compound. Molecular mechanisms in gas formation are also discussed, which include H-abstraction and the following α- and β-scission types of reactions from radical intermediates. Oxygen affected the furfural and 5-HMF pyrolysis very much, although the influences on other compounds were not so large. The oxygen addition significantly enhanced the coke formation from furfural and 5-HMF.
2010-08-02