Saccharification of cellulose by dry pyrolysis

摘要: Pyrolysis of cellulose was studied for the purpose practical production 1,6-anhydro-β-D-glucopyranoside (levoglucosan, LG). To minimize secondary degradation levoglucosan, two methods were examined: (1) conductive heating by glass bottle, and (2) radiation from surface CO2 laser beam, both under vacuum in a nitrogen atmosphere. Glass-bottle pyrolysis gave levoglucosan yield 50%–55% optimum temperature range 350°–410°C, where placing cold trap vicinity heated area effective improving yield. In contrast, glass-bottle low yields 17%–20%, probably due to slower diffusion product hot region. The as aerosol (white smoke), causing difficulty recovery product, maximum 5%–17%. this case treatment flow aerosol, reached approximately 25%.