Pyrolysis Characteristics of Basic Components

For the nine combustible solid waste (CSW) basic components proposed in Chap. 2, pyrolytic experiments in thermogravimetric analyzer (TGA), Macro-TGA, and horizontal fixed bed reactor (HFBR) were performed. Kinetics were fundamental characteristics of pyrolytic reactions. The slow pyrolytic kinetics of intrinsic chemical reactions were studied in TGA, and the fast and slow pyrolytic kinetics with heat and mass transfer effect were studied in Macro-TGA, which was more similar to industrial fixed bed reactor. Finally, the kinetics from different conditions were compared. In addition, the product (gas, liquid, and solid) distribution was studied in horizontal fixed bed reactor. The gas products from TGA pyrolysis were analyzed by Fourier transform infrared spectroscopy (FTIR), and the gas products from horizontal fixed bed reactor were analyzed by gas chromatography (GC). Polycyclic aromatic hydrocarbons (PAHs) are important pollutants during thermochemical conversions of CSW. Therefore, the PAHs formation characteristics were quantitatively studied in the horizontal fixed bed reactor. Based on the above results, the pyrolytic mechanisms and the PAHs formation mechanisms were further explored.