Abstract:
To improve the knowledge about pyrolysis behavior of reed black liquor, pyrolysis experiments were carried out at 530, 580, 630, 680, 730 and 780 ℃ in fluidized bed under atmospheric N
2. Effects of bed temperature on yields of gas product, carbon conversion, emission of NO
x and SO
2, characterization of tar, and micro-morphology of pyrolysis char were examined. The results show that the main components of gaseous product are CO, CH
4, CO
2 and H
2. The volume percentage of H
2 and CO increases with increasing bed temperature, but that of CH
4 and CO
2 is opposite. In addition, with increasing temperature the concentration of combustible gases increases from 59.2% at 530 ℃ to 66.1% at 780 ℃. The yield of tar decreases with increasing temperature. The relative content of polycyclic aromatic hydrocarbons is 46.88% at 780 ℃, which is the maximum among six bed temperatures.