The Challenge Points of Plastic-to-Fuel: What Will It Take to Bridge The Gap and Scale Circular Energy?

Every year, millions of tonnes of plastic waste pollute our ocean ecosystems, threatening our marine life and coastal communities. At Ocean Purpose Project (OPP), we believe lasting solutions require combining grassroots action with bold innovations -the driving force behind our Plastic to Fuel (PTF) initiative.

Ocean Purpose Project’s modular Plastic-To-Fuel unit

Source: Ocean Purpose Project

Our solution targets difficult-to-recycle marine plastics and converts them into valuable clean energy and industrial products, including Very Low Sulphur Fuel Oil (VLSFO), Aquamarine (Blue) Hydrogen, Carbon Black, and Carbon Nanotubes (CNTs). We achieve this through pyrolysis, a thermochemical process that applies high heat (between 400℃ and 600℃) in an oxygen-deprived environment to break down complex, long-chain polymers into shorter hydrocarbon molecules. Because it operates without open combustion, pyrolysis prevents the release of harmful emissions, providing a circular solution to managing ocean wastes.

Today, PTF technology sits at a critical crossroads, and scaling this for commercial use requires navigating several technical and regulatory gaps.

Why is scaling PTF technology mechanically challenging?

Traditional recycling relies on clean, single-stream plastics sorted neatly at municipal plants. However, the ocean offers no such luxury. The marine debris recovered through OPP’s coastal clean-ups are often a mix of stubborn plastics, such as Low-Density Polyethylene (#4 LDPE), Polystyrene (#6 PS), and Others (#7). Because every collection batch contains an unpredictable ratio of these polymers, and each plastic polymer cracks at fundamentally different temperatures and energy thresholds, the reactor’s breakdown speed and heat requirements are constantly fluctuating. This leads to variations in fuel density, flash points, and liquid oil yields from one batch to another. 

Various trash collected during OPP's beach cleanups

Source: Ocean Purpose Project

While Ocean Purpose Project’s current modular PTF units focuses on using standard thermal pyrolysis, OPP is actively exploring other thermochemical alternatives, including thermocatalytic conversion and microwave technology, to maximise fuel yield consistency.

• Thermocatalytic Conversion: Introduces specialised catalysts, such as zeolites or silica-alumina matrixes, to lower the reaction’s activation energy, thereby reducing overall energy consumption

• Microwave Technology: Microwave energy provides rapid, volumetric heating, eliminating cold spots and slow thermal conductivity

  
  

Furthermore, prolonged exposure to saltwater and ultraviolet radiation from the sun leaves ocean wastes heavily degraded and contaminated. If unmanaged, this poses several risks to the operation and longevity of our PTF units:

• Seawater deposits high concentrations of sodium and chlorine ions onto plastic surfaces. If unwashed, these residual halides can rapidly deactivate the catalysts and degrade fuel quality

• Hazardous plastics like Polyvinyl Chloride (#3 PVC) must be strictly isolated or chemically dechlorinated. When heated, PVC releases toxic hydrochloric gas that corrodes stainless steel reactor walls and poses safety risks to operators

• Entrained moisture drastically reduces the thermal efficiency of the PTF unit, as it forces the reactor to expend significant thermal energy to vaporise water into steam before any chemical cracking can occur

• Algae, barnacles and organic matter from ocean-bound plastics introduce unwanted nitrogen, sulphur and oxygen atoms into the hydrocarbon stream. This can cause degradation of the fuel’s storage stability and elevate emissions beyond strict ISO 8217 marine fuel standards

Hence, transforming these weathered debris requires rigorous pre-treatment processes to strip away any and all physical contaminants, specifically sea salt, sand, organic biofouling and moisture.

Navigating the Intellectual Property (IP) Trap

While securing a patent can be viewed as a direct path to commercialising our PTF technology, there are several distinct legal and strategic hurdles to overcome:

• Core chemical processes, such as pyrolysis, already reside extensively in the public domain. Since our PTF modular unit involves curating and integrating already existing technologies, securing broad hardware patent protection can be challenging

• Securing and maintaining patents across global markets requires substantial capital

• Enforcing patent infringement claims in jurisdictions like Singapore requires proving consequential loss

The Marine Fuel Transition Gap

Our PTF technology yields 2 primary energy outputs: VLSFO and hydrogen. In isolation, both of these face a market dead-end with VLSFO simply being unable to survive tightening carbon benchmarks due to its heavy lifecycle emissions (around 91 to 94 g CO₂eq/MJ). Moreover, switching to greener alternatives like hydrogen isn’t realistic either, not when there are massive storage demands and a near-total lack of port-side bunkering infrastructure. However, if the end fuels can’t be used, commercial demand for PTF collapses.

A chart showing the lifecycle emissions of marine fuels, highlighting VLSFO.

Opportunities of PTF Technology

OPP’s value proposition lies in opening the market to make PTF technology commercially viable for everyone. Key opportunities include:

• Presenting our low sulphur fuel oil as a “drop-in” biofuel blend enables shipowners to meet international regulatory requirements without the need for expensive engine overhauls

• Addressing the global scarcity of reliable hydrogen supply by offering our hydrogen output as a direct feedstock for onboard fuel cells and zero-emission auxiliary power systems

• Capitalising on our PTF unit’s modular design to allow ports and terminals to deploy and scale capacity incrementally as local demand grows
  

  
  

Scaling Plastic to Fuel technology requires overcoming technical, regulatory, and market challenges. At Ocean Purpose Project, we see these as opportunities to refine our technology and make waste-to-resource solutions more commercially viable. By turning difficult-to-recycle marine plastics into valuable resources, we aim to advance a circular economy and build a more sustainable future for our oceans and coastal communities.