Slow pyrolysis of pine wood: Effect of CO2 and N2 atmospher

Abstract

Biomass pyrolysis is one of the most promising approaches for effective biomass utilization. The role of N 2 and CO 2 atmosphere during slow pyrolysis of pine wood has been studied in a fixed bed reactor to understand the atmosphere effect on distribution of product yields, composition of bio-oil and conversion of biomass. The slow pyrolysis of pine wood was carried out at 300-550 °C. The maximum liquid yields obtained are as follows: 54 wt.% bio-oil obtained in CO 2 and 58 wt.% obtained in the presence of N 2 .Under different atmospheres, differences in the yields of gases, liquid, char and also variations in oxygenated compounds observed. Phenols and furans were prominent in bio-oils obtained at all tested temperatures.From the GC-MS analysis showed that the phenolic compounds in the bio-oil produced from pine wood in fixed bed were significantly higher under N 2 atmosphere than the CO 2 atmosphere These results are likely to confirm that CO 2 has role on slow pyrolysis of pinewood biomass.