Research On Selective Fast Pyrolysis Of Cellulose To Produce Anhydrosugar Derivatives

Fast pyrolysis is a promising technique to convent lignocellulosic biomass into bio-oil. But crude bio-oils are hard to be used due to the poor fuel properties. Based on this background, the work performed in this thesis is preliminary research on selective fast pyrolysis cellulose to produce valued-added chemical.In the paper, cellulose was used as feedstock and self-made solid superacid as the catalyst. The TG-FTIR and Py-GC/MS was used to research the characteristic of cellulose under the catalysis of solid superacid.The two SO42-/TiO2catalysts exhibited much better catalytic capability and selectivity to produce the LGO, while the SO42-TiO2(anatase) also performed a little better than the SO42-/TiO2(rutile) catalyst. The high heating rate is benefit for the formation of LGO. So SO42-/TiO2(anatase) was chose as the catalyst when experiments were performed. During the catalytic pyrolysis process, the presence of the catalysts lowered the temperature for the initial decomposition of cellulose, and meanwhile altered the pyrolytic product distribution. It inhibited the LG formation, while promoted the LGO with high selectivity. Pyrolysis temperature affected the LGO production greatly. The highest LGO yield was obtained at the set pyrolysis temperature of400℃, and the highest LGO content was obtained at350℃with the peak area%over50%.