Pyrolysis polygeneration of poplar wood: Effect of heating rate and pyrolysis temperature

The pyrolysis of poplar wood were comprehensively investigated at different pyrolysis temperatures (400, 450, 500, 550, and 600 degrees C) and at different heating rates (10, 30, and 50 degrees C/min). The results showed that BET surface area of biochar, the HHV of non-condensable gas and bio-oil reached the maximum values of 411.06 m(2)/g, 14.56 MJ/m(3), and 14.39 MJ/kg, under the condition of 600 degrees C and 30 degrees C/min, 600 degrees C and 50 degrees C/min, and 550 degrees C and 50 degrees C/min, respectively. It was conducive to obtain high mass and energy yield of bio-oil at 500 degrees C and higher heating rate, while lower pyrolysis temperature and heating rate contributed towards obtaining both higher mass yield and energy yield of biochar. However, higher pyrolysis temperature and heating rate contributed to obtain both higher mass yield and energy yield of the non-condensable gas. In general, compared to the heating rate, the pyrolysis temperature had more effect on the product properties. (C) 2016 Elsevier Ltd. All rights reserved.