City Oil Field – Plastic Recycling

City Oil Field – sustainable recycling for plastic

zero emissions solution
for mixed waste plastic

200 – 270 °C processing –
this is not pyrolysis!

no wet waste! no
sludge by-product!

works with most plastics,
even metallised films

converts plastic to ultra-pure oil;
10,000+ KCal, -40 °C flow point

Readiness Level 9; up to
120 tonnes per day per module

Waste plastic is a monumental problem for the environment
and a missed opportunity for the economy…

The global production of plastics skyrocketed from around 1.5 million tonnes in 1950 to
nearly 350 million tonnes in 2017. Cumulatively, global plastic production has surpassed
8 billion tonnes – and fewer than 10% of these plastics are being recycled.

Plastics are versatile, low-cost and lightweight. They extend the life of perishable goods, enable
low-cost and low-emissions transportation of commodity products, and have contributed
to modern advances in medicine. However, six decades of mass production of plastics have
resulted in billions of tonnes of waste sitting idly in landfills or escaping to the environment.

Innovators within the circular economy are looking at depolymerisation to convert polymers
back to their respective monomers. These techniques, however, may struggle to operate
at a large enough scale to cope with the scale of the global plastic industry. Moreover, chemical
depolymerisation is unable to process multiple polymer chemistries simultaneously.

Landfill plastic is a missed economic opportunity. Indeed, polymers are produced from crude
oil; they are resource-rich despite being economically redundant! To harvest their resource
value, City Oil Field developed a proprietary technique capable of processing mixed plastics
at low temperature. The technology can manage multiple chemistries over a broad range of
materials including metallised and composite films, without processing at the front end.

The Process

loading mixed plastics;
no pre-treatment required

thermal decomposition
at 200 – 270 °C

heavy oil cracking to
produce light oil

second-stage refining to
produce ultra-pure oil

The plastics are loaded into a decomposition furnace without sorting, washing, shredding or
processing of any kind. The system can tolerate mixed plastics, food and metal impurities – it
is therefore suitable for excavated / landfill plastic. Specially designed and fine-tuned ceramic
balls enable catalytic degradation at 200 – 270 °C, producing a heavy oil.

A 2-step refinement process converts the heavy oil to a highly refined Diesel-like oil. The oil
meets all national standards in South Korea, where the technology has been invented and
proven at scales of more than 100 tonnes per module per day. Net flow figures of -40 °C were
achieved directly from landfill plastic, and calorific values are consistently above 10,000 KCal.

One of the advantages of the technique is that operators do not have to deal with any liquid or
sludge waste at the end of the process. All residues are in solid or powdered form – enabling
separation of metals and other valuable materials once the plastic burden has been stripped off.

The machinery is ASME certified and a full-scale operational plant is available to inspect.