Abstract
The paper presents physicochemical properties of pyrolysis oil (PO) blends obtained from pyrolysis of rubber and spent tires mixed with selected heavy fuel oil (HFO) and the effect of PO properties on physicochemical properties of the final heavy heating oil. On the basis of physicochemical properties determinations, one sample of PO was selected, which was characterized by the best properties from the point of view of technological application. In the next step, physicochemical properties for the selected sample of heavy heating fuel oil consisting of 25% PO and 75% HFO were determined. It was found that the most important property of tire-derived PO is the content of gasoline, i.e., light hydrocarbons with a boiling point below 180 °C, which determine the ignition temperature of the obtained fuel blends. This property determines also the amount of PO that can be added to HFO, on the order of 30 wt % and more. The lower content of light hydrocarbons, the greater the amount of PO can be used to compose HFO. A positive aspect of the use of tire derive PO for the composing of heavy heating fuel is about a threefold decrease in kinematic viscosity, lowering the flow temperature and a significant reduction in ash content. Other properties of the modified HFO remained virtually unchanged and the fuel obtained as a result of blending meets the requirements of the relevant standard.
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