An experimental study of the competing processes of evaporation and polymerization of levoglucosan in cellulose pyrolysis.

摘要: Abstract While levoglucosan is a major pyrolysis product of cellulose, the yields reported in literature vary significantly depending upon experimental conditions. In present paper, we found that during micropyrolyzer, yield from cellulose can decrease as sample size increases. According to our previous research, not only evaporates, but also forms polymers at elevated temperatures and these further dehydrate char low molecular weight volatiles such water, furfural, furan, acids. These results strongly suggest variables may influence competing processes evaporation polymerization decomposition, thereby affect final levoglucosan. this various on evaluated experiments conducted with thermogravimetric analyzer. The pyrolytic residues are then quantified using high performance liquid chromatography method. Experimental include size, ventilation condition, sweep gas, heating rate, moisture content. show all tested levoglucosan, consequently recovery