California’s Struggle With Clean Jet Fuel Production And Its Impact On Airline Sustainability Plans

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Efforts by the aerospace sector to adopt environmentally friendly and more sustainable fuels run into significant challenges, particularly in California, where a central figure in the production of clean jet fuel has stumbled. United Airlines and JetBlue Airways, together with other airlines, viewed World Energy’s Paramount refinery as a landmark for the reduction of aviation emissions. However, the refinery ceased operations in April 2025 and plans for expansion remain idled which brings into question the sustainable aviation fuel (SAF) production in the U.S.

The Setback in California

World Energy, based in Boston, was one of the pioneers in producing sustainable aviation fuel at its Paramount refinery near Los Angeles. This plant had been supplying airlines like United Airlines with SAF, made from used cooking oil, agricultural waste, and other byproducts. United Airlines had partnered with World Energy to create a cleaner, greener future for aviation, with a target of using SAF to make up ten percent of total fuel consumption by 2030.

However, in a disappointing turn of events, World Energy has closed its Paramount refinery, laying off all employees and halting operations. The company cited an over-budget refurbishment and operational delays as contributing factors. Meanwhile, a second facility planned in Houston is now delayed indefinitely, underlining the ongoing challenges within the industry.

Limited Industry Commitment

The closure of the refinery and United Airlines’ decision to end its contract with World Energy highlight a deeper issue within the airline industry. While many airlines have announced plans to switch to SAF, progress has been slow and inconsistent. According to industry reports, out of one hundred sixty five SAF projects announced in the past twelve years, only thirty six have moved beyond the planning stage, with many facing financial, technological, and logistical barriers.

In many cases, airlines promises to adopt SAF appear to be overblown, with limited investments in actual production facilities. The gap between airline commitments and real, large-scale production capacity has led to skepticism about the industry’s ability to meet its carbon reduction targets.

Aviation’s Green Transition Faces Delays

The International Air Transport Association (IATA) has set ambitious goals, aiming for net-zero emissions by 2050. To meet this target, SAF would need to make up a significant portion of the industry’s fuel consumption. However, the forecast for SAF usage in 2025 is just 0.7 percent of total jet fuel consumption, far short of the target.

Despite various pilot projects and plans, the lack of commitment from both airlines and the oil industry has hindered large-scale SAF production. The cost of SAF, which is three to five times more expensive than traditional jet fuel, remains a major barrier. Oil companies have been reluctant to ramp up production without stronger demand, leaving airlines in a difficult position.

Delays in New Projects

The future of SAF production is further complicated by delays in new projects. One example is a planned SAF facility in Panama, which was supposed to be operational by 2025. However, delays have pushed back production to 2027, with industry experts citing a lack of airline interest as a primary reason.

Airlines’ reluctance to commit to SAF at scale is a significant roadblock. Many producers are calling for more cooperation from airlines and industry leaders to build the necessary infrastructure for mass SAF production. Without strong airline backing, projects such as the Panama facility may shift focus to other industries, such as renewable diesel for trucks and ships, where demand is higher.

The Role of Governments and the Future of SAF

Governments have a crucial role to play in incentivising SAF production and ensuring that airlines meet their emissions targets. For example, the European Union has already introduced mandates requiring airlines to use increasing amounts of SAF, starting at two percent in 2025 and rising to seventy percent by 2050. These regulations are expected to cost airlines billions of dollars, and further pressure will be placed on the aviation sector to invest in SAF technologies.

The U.S. has also taken steps to support SAF development, though the lack of clear policies and government incentives has slowed progress. While the closure of World Energy’s refinery is a setback, it also underscores the need for stronger, more consistent support from governments to make sustainable aviation fuel a viable and widespread solution.

A Green Future for Aviation?

The aviation industry has definitely improved its efforts in managing its carbon footprint, but the transition to clean fuels is much more complex than most people thought. The increasing production expenses, lack of airline investment, and industry adoption of airline carbon quotas all pose serious roadblocks for the aviation industry.

As more projects struggle to get off the ground, aviation policies and more investment from airlines are crucial for the industry. Without the cooperative effort from airlines, fuel manufacturers, and industry regulators, the aviation industry has no chance of achieving the environmental sustainability targets set for the coming years.