Scrap tires in.
Fuel out.
Oldridge Renewables converts end-of-life tires, plastics and other hydrocarbon waste into liquid fuel, fuel gas and recovered carbon. Our continuous, closed-retort pyrolysis system is engineered for round-the-clock industrial duty.
Tires don't break down. They pile up.
A tire is engineered to last, which is exactly why it is so hard to dispose of. The largest single use today is burning them as fuel. Pyrolysis takes the hydrocarbons in a tire apart and returns them as products a market can use.
Source: U.S. Tire Manufacturers Association, 2021 U.S. Scrap Tire Management Report.
The Energy Conversion Processor System
The ECPS heats waste inside sealed stainless steel retorts, with no oxygen and no open flame touching the material. Heat breaks long hydrocarbon chains into gas and vapor, and an integrated clean-up train turns that stream into usable fuel.
Isolated from the furnace
Twin stainless steel retorts sit inside an internally insulated reactor box. No gas passes between the furnace and the retorts.
Fast stage, then a hot stage
The upper retort runs fast pyrolysis and releases most volatiles. The lower retort runs hotter to break down the harder material.
Air stays out
Material enters through paired airlock valves that open one at a time, keeping air out of the reaction zone.
Time set by the feedstock
Augers turning at about ½ rpm hold material for at least 60 minutes, extendable past three hours for difficult feedstocks.
Slight negative pressure
Variable-speed blowers hold the retorts just below zero inches of water column, so process gas cannot escape through seals.
Automated and protected
A touchscreen PLC runs feeding, augers, burner and blowers, with temperature and pressure limits that shut the burner down automatically.
ECPS technology developed by American Renewable Technologies, Inc. (ARTI), licensed to Oldridge Renewables.
From casing to clean fuel in eight stages
Each stage is a separate, serviceable module on the ECPS skid. Follow the material from the feed hopper to the fuel tank.
Feed & airlock
Shredded tire and other feedstock enter through twin airlock valves.
Metered feedUpper retort
Fast pyrolysis releases most of the volatiles as the auger carries material forward.
Breakdown from ~500 °FLower retort
Higher temperatures finish the harder material before it exits through a second airlock.
≥ 60 min residenceCarbon capture
A reverse auger and cyclone pull carbon and ash out of the gas stream.
Solids recoveredTwin scrubbers
Venturi and spray scrubbing cool and clean the gas. Redundant tanks allow service while running.
Gas clean-upCondenser
A heat exchanger and vertical demister condense the oil fraction out of the vapor.
Liquid fuel outGas blowers
Twin Roots-type blowers move the gas and hold the system under slight vacuum.
Pressure controlStorage & use
Fuel gas collects in an intermediate tank, ready for use or further treatment.
Fuel gas out
Three products from one waste stream
Liquid fuel
Condensed pyrolysis oil, collected at the condenser.
Fuel gas
Non-condensable gas, scrubbed and stored for use as a fuel.
Recovered carbon
Solid carbon separated from the gas by the reverse auger and cyclone.
Natural gas, upgraded to liquid fuel
Our gas-to-liquids platform applies ARTI Fischer-Tropsch synthesis to turn natural gas, including stranded and associated gas, into clean synthetic liquids.
- Diesel, naphtha, waxes and lubricant base stocks
- Jet-range fuel, finished to ASTM D7566 / D1655 before aviation sale
- Modular trains that scale deployment by deployment
- Built from commercially available equipment
Building with UNRG across five sites
Oldridge Renewables is partnering with United Energy Corporation (UNRG) to add sustainable aviation fuel and gas-to-liquids capacity alongside UNRG's LNG operations.
Midland, TX
UNRG's existing LNG production facility in the Permian Basin.
100,000 gpd LNGLakeview, OR
Redevelopment of an existing industrial facility into a regional fuels center.
160,000 gpd LNG + SAFKansas
A second combined LNG and SAF facility.
160,000 gpd LNG / SAFPennsylvania
Expansion into Appalachian natural gas supply.
LNG expansionGalveston, TX
LNG and SAF production with port access to the Gulf.
LNG / SAF + portProposed projects and the Oldridge Renewables–UNRG combination remain subject to definitive agreements, financing, permits and approvals.
Built with the communities that host us
Local hiring first
We prioritize qualified local residents for construction and operating roles, and regional suppliers for services.
Trained operators
Initial startup by a certified technician, plus a week of hands-on operator training on the system.
Engineered safety
Sealed retorts, vacuum operation and automatic burner shutdown are built into the system design.
Long-term presence
We redevelop existing industrial sites and plan to operate them as long-term energy assets.
Put your waste stream to work
We work with partners at both ends of the process and in the capital that connects them.
Supply tires and plastics
Tire collectors, recyclers, haulers and municipalities with steady volumes of end-of-life material.
Buy fuel
Fleets, industrial users and refiners looking for liquid fuel, fuel gas and recovered carbon.
Build a site
Landowners, communities and investors ready to host or finance a processing facility.
Partnerships & project inquiries · [contact email]
Back to top