Aerosol behavior in chromium waste incineration--颗粒学报PARTICUOLOGY

Cr₂O₃ is considered as the dominant incineration product during the combustion disposal of chromium waste. A hydrogen/air diffusion flame was employed to simulate the industrial process of incineration. Cr₂O₃ aerosols were generated inside the flame by the gas phase reaction of chromium and oxygen. Chromium came from the rapid decomposition of chromium hexacarbonyl (Cr(CO)₆) at room temperature and was carried into the combustion chamber by hydrogen. Aerosol and clusters can then be easily formed in the flame by nucleation and coagulation. A two dimensional Discrete-Sectional Model (DSM) was adopted to calculate the Cr₂O₃ aerosol behavior. The experimental measurement method was Dynamic Light Scattering. The numerically predicted results agreed well with those of the experimental measurement. Both results show that the Cr₂O₃ aerosol size reached about 70 nanometers at the flame top.

Graphical abstract

Keywords

chromium; aerosol; Dynamic Light Scattering; Discrete-Sectional Model; flame

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