Clean Energy from Fryer Residue

At a cafe after breakfast, I sat with my friend Emad, chatting, when we noticed a worker coming out of a restaurant to empty used cooking oil into an old barrel next to it. Emad remarked, "Isn't it a shame for this oil to just be thrown away like that?"

– "Imagine if we could use this oil for a car!" I smiled and told him, "Not just a car... but a plane too."

Emad was very surprised. Used cooking oil has become a strategic material today for producing low-emission renewable fuel.

Thus, a casual, chance conversation turned into a scientific discussion, leading directly to a highly important topic: How has used cooking oil waste from kitchens become part of the future of clean energy?

The Importance of Used Cooking Oil as a Renewable Fuel

Used Cooking Oil (UCO) is considered one of the best raw materials for producing various types of renewable fuels, such as:

• Biodiesel
• Renewable Diesel
• Sustainable Aviation Fuel (SAF)

It is characterized by:

• It does not compete with food crops.
• It is available in large quantities from homes and restaurants.
• It reduces pollution caused by improper disposal of oils.
• It reduces emissions by up to 80% compared to petroleum-based fuels.

The Global Market for Used Cooking Oil

Recent data indicates rapid growth in this sector:

• The global used cooking oil market was valued at $7.9 billion in 2024, with projections to reach $12.2 billion by 2032.
• Global trade in used oils reached 3.7 billion gallons in 2022, with expectations to rise to 5–10 billion gallons by 2030.
• Used cooking oil has become the primary raw material in the renewable fuel industry in Europe and the United States, especially with stricter emission reduction policies.

These figures reflect a global shift towards adopting used cooking oil as a key resource in the clean energy industry.

How is oil converted into fuel?

The conversion process utilizes advanced chemical techniques, primarily:

• Transesterification: To produce biodiesel.
• Hydrotreating: To produce renewable diesel and sustainable aviation fuel.

These processes remove impurities and convert the oil into high-quality fuel that can be used directly in engines without major modifications.

Efforts of Saudi Arabia and Gulf countries in this field

Gulf countries are seeing an expansion in renewable fuel projects as part of national visions like Saudi Vision 2030 and the Green Middle East Initiative.

Saudi Arabia

It has the largest biofuel projects in the region and relies on used cooking oils as a primary raw material.

• Saudi Arabia is expanding its refining capacity to reach tens of millions of liters annually.
• Saudi companies are developing advanced technologies to collect, process, and convert used oils into low-emission fuel.

UAE

• It relies on specialized companies to convert restaurant oils into biofuel, which is then used in transport fleets and municipal vehicles.

Bahrain, Kuwait, and Qatar

• Bahrain has launched programs to collect cooking oils from homes and restaurants in collaboration with private companies.
• Kuwait and Qatar are working on pilot projects to produce biodiesel as part of broader plans to reduce emissions and diversify energy sources.

These efforts reflect a clear Gulf trend towards a circular economy that leverages local waste to produce clean energy.

Environmental and Economic Impact

Converting used cooking oil into renewable fuel offers wide-ranging benefits, including:

• Reducing carbon emissions.
• Minimizing pollution from improper oil disposal.
• Creating job opportunities in collection, processing, and refining.
• Supporting the circular economy and reducing reliance on crude oil.

Conclusion

Converting used cooking oil into renewable fuel is no longer just an innovative idea; it has become a cornerstone of global clean energy strategies. With market expansion, increasing demand for sustainable aviation fuel, and the progress of Gulf countries, particularly Saudi Arabia, in oil collection and refining projects, this industry appears poised to play a pivotal role in the future of energy. Investing in this sector represents a practical step towards a cleaner environment and a more sustainable economy.

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