Experimental study on pyrolysis of reed black liquor in fluidized bed

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 N₂. Effects of bed temperature on yields of gas product, carbon conversion, emission of NO_x and SO₂, characterization of tar, and micro-morphology of pyrolysis char were examined. The results show that the main components of gaseous product are CO, CH₄, CO₂ and H₂. The volume percentage of H₂ and CO increases with increasing bed temperature, but that of CH₄ and CO₂ 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.