Abstract
Due to its high total sulphur content and other unfavourable properties, pyrolytic oil obtained as a result of tyres pyrolysis is not suitable for use as motor or heating fuel. Therefore, pyrolytic oil was hydrorefined. Hydrorefined oil was used as a component of light heating oil. A composition was prepared from 30 wt % hydrorefinate with 70 wt % Ekoterm Plus (a commercial oil). Unfortunately, the flash point temperature of the hydrorefinate was too low, and did not allow fuel compliant with the Polish standard PN-C-96024:2011 for L1 light heating oil to be obtained. Therefore, the fraction with boiling point below 180 °C was removed from the hydrorefinate. The residue, with a flash point of 74 °C and a sulphur content of 0.143 wt %, was mixed with Ekoterm Plus and fuels with a hydrorefinate fraction content of 30 and 50 wt % were prepared. The composition containing 30 wt % met the requirements for L1 oil in the whole range of tested parameters. Total sulphur content was 0.092 wt %, specific weight was 856 kg/m3 and closed cup flash point was 64 °C. However, the composition containing 50 wt % hydrorefinate did not meet the requirements regarding sulphur content and specific weight. Sulphur content, specific gravity, and flash point are the parameters limiting the possibility of using hydrorefined pyrolytic oil for composing light heating oils compliant with the mentioned standard.
Highlights
The tyre is a composite rubber product which accounts for the bulk of rubber production.The rubber used in tyres consists of approximately 60–65 wt % of various raw rubbers, 25–35 wt %of technical carbon black and 0–5 wt % of silica, plasticizers and anti-aging substances
Due to its high total sulphur content and other unfavourable properties, crude pyrolytic oil (CPO) obtained as a result of tyre pyrolysis is not suitable for use as motor or heating fuel
Due to its high total sulphur content and other unfavourable properties, pyrolytic oil obtained as a result of tyre pyrolysis is not suitable for use as motor or heating fuel
Summary
The tyre is a composite rubber product which accounts for the bulk of rubber production.The rubber used in tyres consists of approximately 60–65 wt % of various raw rubbers, 25–35 wt %of technical carbon black and 0–5 wt % of silica, plasticizers and anti-aging substances. The rubber used in tyres consists of approximately 60–65 wt % of various raw rubbers, 25–35 wt %. Rubbers are cross-linked by means of sulphur cure systems containing sulphur, an accelerator, usually an organic-sulphur compound and an activator, which usually consists of zinc oxide and stearic acid. The production of tyres accounts for about 60%–70% of the rubber industry production, and the percentage of tyres in the collection of used rubber products is even higher, amounting to about 80 wt % [1,2,3,4,5,6]. The basic and cost-effective way to dispose of rubber scrap—especially used tyres—is still burning, usually in cement plants [4,5]
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