Waste Oil Pyrolysis

Used lubricating oil does not have to be a disposal problem. Subjected to heat, its long hydrocarbon chains crack apart into lighter molecules that closely resemble gasoline and diesel, and the temperature of that reaction decides how much of each fuel emerges. Waste oil pyrolysis turns a polluting by-product into a transport-fuel feedstock.

How the Conversion Works

The route begins with pretreatment to strip water and solid contaminants from the collected oil. The cleaned oil is then heated in a reactor under controlled conditions. Above roughly 400 degrees Celsius the oil begins to crack, and the vapour is condensed and fractionated into lighter cuts. The resulting liquid is characterised the way any fuel would be, on specific gravity, viscosity, flash point, distillation range, and heating value, to confirm it meets an acceptable specification.

What Temperature Does to the Product

Studies that ran the reaction at three temperatures found a consistent pattern. As the cracking temperature rises, the depth of cracking increases, so the product comes out lighter: specific gravity, viscosity, and flash point all fall, and the share of aromatic hydrocarbons rises. The trade-off shows up in the yield split: higher temperatures produce a larger gasoline fraction and less diesel, and leave less unreacted residue; lower temperatures favour the heavier diesel cut. In effect, the operator tunes the fuel mix by choosing where in the temperature window the reactor runs.

Why It Matters

The appeal is twofold. Environmentally, the process removes a hazardous waste stream from a fate in soil, groundwater, or open burning, a small volume of oil being capable of contaminating a far larger volume of water. Economically, it converts that waste into a usable fuel with its own market value, which is what moves waste oil from a cost centre on the disposal ledger to a recoverable feedstock on the energy side.

Learn More:

• Feasibility Studies for Waste-to-Value Projects
• Turn-Key EPC Delivery
• Plant Design & Engineering
• Facility Efficiency Upgrades
• Resource Recovery Projects

Set the Reactor Conditions That Pay

The yield of gasoline versus diesel and the quality of both are set at the heating stage, so process design and temperature control are where the economics are won.

Klean Industries provides feasibility studies, engineering, and turn-key delivery for waste-to-value facilities that convert used oil into recovered fuel.

Considering a waste oil to fuel project?

Contact Klean Industries about waste oil to fuel » GO.