Investigating of Environmental Pollution in the Pyrolysis Process of Different Woods

Pyrolysis is a simple process to convert lignocellulose biomass into hydrocarbon fuels. The aim of this study is to investigate the effect of wood type on green gas emission. For this aim, five types of different woods were selected and pyrolyzed at 500°C. A lab-scale set-up with a capacity of 6 g biomass was used. The results showed that the amount and composition of the products are different when the wood type changed. Pinewood had the highest gas production yield (34 wt%), while the tree of heaven showed the minimum gas yield (18 wt%). Moreover, the maximum tar yield was obtained for pine wood (23 wt%). Poplar produced the lowest amount of tar (16 wt%). In addition, the minimum char was achieved from the pyrolysis of pine wood (20 wt%). However, poplar resulted in the highest yield of char. The maximum yield of CO2 was observed in the pyrolysis of pine. From the gas analysis, it can be concluded that the pyrolysis of different woods can produce a significant amount of green gas resulting in the speeding up of world global warming. The tar analysis showed that big aromatic compounds were produced from lignin in the wood structure. Furthermore, pinewood had the highest conversion amount of cellulose and hemicellulose into sugars.