Properties And Application Of Pyrolytic Oil From Pyrolysis Of Used Tires In Rotary Kiln

The pyrolysis scrap tires in a rotary kiln is to achieve energy recovery by converting tires to oil, char and gas. This method is considered to be an environmentally acceptable and promising disposal method with its high-energy recovery and low pollution emission. The focus of this study is the pyrolysis oil derived from the pilot-scale pyrolysis of scrap tires in a rotary kiln. The pyrolytic oil use as fuel and heavy fraction of the pyrolytic oil use as coke material were investigated.The degradation of pyrolytic oil and diesel oil was discussed at first. By using thermogravimetric-fourier transform infrared spectrum (TG-FTIR) under atmosphere of nitrogen and oxygen at different heating rates is researched in this paper. The characteristic of weight loss of pyrolytic oil or diesel oil was studied by means of non-isothermal thermogravimetric analysis. The combustion models were calculated by using integral method and the kinetic parameters were determined. The volatile in the process of degradation was analyzed by FTIR and the spectrums were compared with the pyrolytic oil and diesel oil.Then, the furnace combustion tests about pyrolytic oil were carried out. Through the combustion tests, comparison of the emissions was made with similar the combustion of diesel fuel as a representative of a petroleum-derived fuel with similar properties. The emissions of the SO₂, NO_x, soot and polycyclic aromatic hydrocarbons (PAHs) were monitored. The measurement for soot concentration in the combustion base on the mult-wavelenths light extinction is studied. There seem to be some relations with the flame height and temperature and the excess atmosphere levels on the soot concentration.The heavy fraction (b.p.>350℃) of the oil obtained during rotary kiln pyrolysis of used tires is mainly composed of aromatic hydrocarbons. The coking experiments were carried out in a laboratory scale reactor. Through the industry analysis, element analysis, energy dispersive X—ray analysis and X—ray diffraction analysis, the characterization of the pyrolytic oil coke and petroleum coke were performed.