Pyrolysis Oil from Waste Tyres: Quality, Yield Rates, and Commercial Applications

The primary commercial output of a waste tyre pyrolysis operation is pyrolysis oil — a dark, heavy hydrocarbon liquid with a chemical composition broadly similar to No.3 or No.4 heavy fuel oil, but with a distinctive smoky odour and a higher content of aromatic and olefinic hydrocarbon species compared to straight-run petroleum fractions. Tyre-derived pyrolysis oil is one of the most commercially versatile products in the waste recycling sector, with established markets in industrial fuel combustion, marine fuel supply, power generation feedstock, asphalt modification, and as a distillation feedstock for higher-value petroleum product production. Understanding tyre pyrolysis oil's quality parameters, typical yield rates, and the market applications where it provides genuine value is essential knowledge for any operator building a commercial waste tyre recycling business — whether evaluating AOTEWEI's refining plant for upgrading raw oil or simply marketing the unrefined product to industrial buyers.

Typical quality parameters for tyre-derived pyrolysis oil from a well-operated AOTEWEI pyrolysis system include: calorific value of 38–44 MJ/kg (comparable to conventional heavy fuel oil at 40–42 MJ/kg); density of 0.88–0.92 g/cm³ at 15°C; dynamic viscosity of 3–20 cSt at 40°C (varying with the pyrolysis temperature profile); sulfur content of 0.8–1.5% by weight (primarily from the sulfur-cross-linked rubber network in the tyre); water content below 1% when properly condensed and separated; and ash content below 0.5%. The sulfur content is the quality parameter that most frequently limits the marketability of raw tyre pyrolysis oil in regulated markets — many industrial combustion applications have sulfur limits below 1%, and on-road diesel applications typically require sulfur below 50 ppm or even 10 ppm. Where sulfur content is a market barrier, AOTEWEI's distillation and upgrading plant options provide the technical pathway to reduce sulfur to acceptable levels for the target application.

Petroleum processing plant Heat Resistant Waste Synthetic Oil Converting Into Gasoline used engine oil recycling machine

Market Applications for Tyre Pyrolysis Oil

The market applications for raw tyre pyrolysis oil span a wide range of industrial fuel uses where its energy content and general combustion properties are more important than strict specification compliance. Industrial boilers — used for steam generation in textile factories, food processing plants, ceramic kilns, and other manufacturing industries — are among the most accessible markets for raw tyre pyrolysis oil in most developing regions, as boiler operators typically have flexibility to adjust burner settings for different fuel characteristics and are accustomed to managing fuel quality variation. Marine fuel supply, particularly for vessels operating in emission control areas under older bunker fuel specifications, is another significant market in regions with active coastal or riverine shipping. Power generation using heavy fuel oil engines or boilers provides a third market segment, particularly in regions with fuel supply constraints where pyrolysis oil can substitute for conventional heavy fuel oil in captive generation applications.

For higher-value markets, the distillation of raw tyre pyrolysis oil into a diesel fraction represents the most commercially attractive route to market. AOTEWEI's pyrolysis oil refining systems produce a diesel fraction that typically comprises 40–60% of the raw oil input, with the balance divided between light gasoline fraction and heavy residual. The diesel fraction — when produced from good-quality raw oil through a properly operated distillation system — can meet commercial specifications for industrial diesel use and in some cases for on-road diesel blending, commanding prices at or near the regional diesel market price. The premium over raw oil prices for upgraded diesel product is typically 30–50%, making the distillation investment economically attractive for any operation producing above 3 tonnes of raw pyrolysis oil daily — a production level readily achievable with a modest 8–10 TPD tyre pyrolysis plant operating at standard yields.

Pyrolysis Oil Storage, Handling, and Transport

Safe and compliant storage, handling, and transport of tyre pyrolysis oil requires recognition of its classification as a flammable liquid under most jurisdictions' hazardous goods regulations, combined with its specific physical properties — high viscosity at ambient temperature, elevated pour point in cold climates, and the release of volatile hydrocarbon vapours from heated storage surfaces. AOTEWEI's pyrolysis plant designs incorporate covered, bunded steel storage tanks with appropriate venting and level management systems for the safe containment of produced oil at the plant site, with capacity typically sized for 3–7 days of production to provide operational buffer against collection vehicle delays. Transport of pyrolysis oil by tanker truck requires vehicles certified for petroleum product transport and drivers trained in hazardous goods handling — standard requirements that established petroleum product transport operators can readily meet. For operators targeting export markets or long-distance domestic distribution, AOTEWEI can advise on appropriate packaging (ISO tank containers or flexi-bags) and the shipping classification documentation required for international pyrolysis oil transport.