纤维素快速热裂解机理试验研究 Ⅰ. 试验研究

The primary products formation during cellulose pyrolysis was studied using a heat radiation reactor. Combined with GC-MS analysis, Levoglucosan (LG) appeared to be the most important component, and its proportion in bio-oil was about 45w%～85w%. LG was mainly formed at 550 ℃～650 ℃ for the medial temperature of thermal radiation source (TRS). There existed an optimum TRS temperature about 640 ℃ for LG production. Glycolaldehyde and acetol were also the major components, which took up about 6w%～14w% and 3.5w%～8w% in bio-oil separately. However, their production always increased with TRS temperature within a rather wide range, showing that high reaction temperature benefited their formation. Furthermore, glycolaldehyde and acetol were formed in primary reaction competing against LG formation during cellulose pyrolysis, rather than formed from secondary cracking of LG.