Influence of copper(pi)nitrate(CN) on the pyrolysis of waste tires in 50 cm(3) static batch reactor in a nitrogen atmosphere are studied. The products of pyrolysis was investigated with in situ Fourier transform infrared (FT-IR) spectroscopy as well as off-line gas chromatography/Mass spectrometry (GC-MS). The combination of FT-IR and GC/MS analysis was able to elucidate the effects of CN. Comparing with the conditions in no salt nitrate, CN can obviously increase hydrogen yields and remarkably reduce the emission of hydrogen sulfide. At the same time, the addition of CN can change the distribution of polycyclic aromatic compounds such as phenanthrene, triphenylene, naphthalene etc. The composites and properties of the derived gases, pyrolytic oils and specific surface area and pore distribution of solid char were determined. The results showed that the gaseous mixture mainly are H-2, C2H6, C3H8, CO2, CH4, C3H6, CO in sequence of the yields. The liquid mixture emphasis on the distribution of polycyclic aromatic compounds (PAHs). The pore distribution indicated that nearly 98% of pore volume is made up of less than 1.3 x 10(-8) m of radius.