Sustainable Aviation
Recycling Plastic Waste for Sustainable Jet Fuel Additives

Recycling Plastic Waste for Sustainable Jet Fuel Additives
The aviation industry is one of the largest contributors to global carbon emissions, with traditional jet fuels accounting for a significant portion of greenhouse gas emissions. As the world moves toward sustainability, the need for eco-friendly alternatives has become paramount. One promising solution lies in the conversion of waste plastics, specifically polystyrene, into sustainable aviation fuel (SAF) additives. This innovative approach not only addresses the environmental impact of aviation but also tackles the growing problem of plastic waste.
Polystyrene, a common plastic used in packaging, disposable utensils, and insulation, is notoriously difficult to recycle. In the United States alone, approximately 2.5 million metric tons of polystyrene are produced annually, with most of it ending up in landfills. Researchers at the Illinois Sustainable Technology Center (ISTC) have developed a groundbreaking method to convert this waste into ethylbenzene, a key additive for sustainable aviation fuels. This breakthrough could revolutionize the aviation industry by providing a cost-effective and environmentally friendly alternative to fossil fuel-derived additives.
The significance of this development cannot be overstated. By repurposing waste polystyrene, the aviation industry can reduce its reliance on fossil fuels, lower carbon emissions, and contribute to a circular economy. This article explores the science behind this innovation, its potential impact, and the broader implications for sustainability in aviation and beyond.
The Science Behind Polystyrene-Derived Ethylbenzene
Conversion Process
The process of converting polystyrene into ethylbenzene involves two primary steps: thermal pyrolysis and hydrogenation. During pyrolysis, polystyrene is heated to high temperatures, breaking it down into a liquid rich in styrene. This liquid is then subjected to hydrogenation, a chemical reaction that converts styrene into crude ethylbenzene. Finally, distillation is used to purify the ethylbenzene, achieving a purity level of up to 90%.
This method is not only efficient but also cost-effective. Preliminary analyses suggest that producing ethylbenzene from polystyrene is cheaper than traditional methods that rely on crude oil. Additionally, the process reduces carbon emissions by 50% to 60% compared to fossil fuel-derived ethylbenzene, making it a more sustainable option.
“Planes will continue to burn fuel. To reduce carbon emissions associated with aviation fuel, sustainable aviation fuel is the only option. Landfill-bound waste plastic can be a source for sustainable aviation fuel.” – Hong Lu, Research Scientist at ISTC
Why Ethylbenzene Matters
Ethylbenzene is a critical component of sustainable aviation fuels due to its role as an aromatic hydrocarbon. Aromatic hydrocarbons are essential for maintaining the performance and safety of jet engines. They lubricate mechanical parts, prevent leaks by swelling seals, and ensure the fuel’s stability under varying conditions. Current sustainable aviation fuels contain only about 0.5% aromatic hydrocarbons, far below the 8.4% required by regulatory standards. The addition of ethylbenzene bridges this gap, enabling the use of higher proportions of sustainable fuels in aviation.
Moreover, ethylbenzene derived from polystyrene has a lower tendency to form soot upon combustion compared to other aromatic compounds. This characteristic makes it an ideal additive for reducing particulate emissions, further enhancing its environmental benefits.
Broader Implications for Sustainability
Aligning with Global Goals
The development of polystyrene-derived ethylbenzene aligns with global sustainability initiatives, such as the U.S. Department of Energy’s Sustainable Aviation Fuel Grand Challenge. This initiative aims to produce 3 billion gallons of sustainable aviation fuel annually by 2030 and meet 100% of projected domestic jet fuel demand by 2050. By providing a viable source of aromatic hydrocarbons, this innovation supports the aviation industry’s transition to renewable energy sources.
Beyond aviation, this research contributes to the broader goal of achieving a circular economy. By repurposing waste materials, it reduces the need for virgin resources and minimizes environmental pollution. This approach can inspire similar innovations in other industries, fostering a culture of sustainability and resource efficiency.
Economic and Environmental Benefits
The economic advantages of this method are significant. By utilizing waste polystyrene, the cost of producing ethylbenzene is reduced, making sustainable aviation fuels more accessible. Additionally, the reduction in carbon emissions contributes to climate change mitigation efforts, aligning with international agreements such as the Paris Accord.
From an environmental perspective, diverting polystyrene from landfills reduces plastic pollution and its associated hazards. This dual benefit—addressing both aviation emissions and plastic waste—makes this innovation a game-changer in the fight against climate change.
Conclusion
The conversion of waste polystyrene into sustainable aviation fuel additives represents a significant step forward in the quest for greener aviation. By addressing the dual challenges of plastic waste and carbon emissions, this innovation offers a practical and scalable solution for the aviation industry. The development of ethylbenzene from polystyrene not only meets regulatory requirements but also provides economic and environmental benefits, making it a cornerstone of sustainable aviation fuel production.
Looking ahead, further research and investment are needed to scale up production and refine the process. As the aviation industry continues to embrace sustainability, innovations like this will play a crucial role in shaping a cleaner, greener future. By turning waste into a valuable resource, we can pave the way for a more sustainable world.
FAQ
Question: What is ethylbenzene, and why is it important for sustainable aviation fuels?
Answer: Ethylbenzene is an aromatic hydrocarbon that improves the performance and safety of jet fuels. It is essential for meeting regulatory standards and enabling the use of higher proportions of sustainable aviation fuels.
Question: How does the conversion of polystyrene into ethylbenzene reduce carbon emissions?
Answer: The process reduces carbon emissions by 50% to 60% compared to traditional methods of producing ethylbenzene from crude oil. It also repurposes waste polystyrene, preventing it from ending up in landfills.
Question: What are the economic benefits of using polystyrene-derived ethylbenzene?
Answer: Producing ethylbenzene from polystyrene is cheaper than traditional methods, making sustainable aviation fuels more cost-effective. It also reduces the need for virgin resources, contributing to a circular economy.
Sources: Technology Networks, Bioengineer.org
Sustainable Aviation
Twelve Opens First US Commercial Power-to-Liquid SAF Plant
Twelve’s AirPlant One in Moses Lake, WA begins producing E-Jet fuel from CO2, water, and renewable electricity.

Industrial carbon transformation company Twelve officially opened AirPlant One in Moses Lake, Washington, on June 10, 2026, establishing the first commercial-scale facility in the United States dedicated to producing power-to-liquid SAF. The facility utilizes captured carbon dioxide, water, and renewable electricity to manufacture synthetic fuel without upstream fossil fuel extraction.
In a press release issued by Twelve, the company confirmed the plant is now operational and producing E-Jet fuel, alongside a byproduct called E-Naphtha. The milestone follows a $645 million funding round secured in September 2024 to scale operations and fulfills a 2022 joint commitment from Alaska Airlines (AS) and Microsoft Corporation to purchase the facility’s output.
Commercializing power-to-liquid aviation fuel
Twelve’s proprietary process bypasses traditional biomass-based sustainable aviation fuel (SAF) production methods. Instead, the Moses Lake facility synthesizes drop-in aviation fuel directly from renewable electricity, water, and captured carbon dioxide. According to the company, this E-Jet fuel delivers up to a 90% reduction in lifecycle carbon emissions compared to conventional jet fuel.
Beyond emissions reductions, the power-to-liquid model introduces a new economic framework for Airlines fuel procurement. Because the primary input cost is electricity, production can be tied to long-term power purchase agreements. Twelve states this structure can offer airlines price predictability horizons exceeding 10 years, insulating operators from the volatility of global crude oil markets.
“We broke ground on AirPlant One with a simple thesis: that the fuels powering the global economy could be made from renewable electricity and air, anywhere in the world,” said Nicholas Flanders, Co-Founder and CEO of Twelve. “Today, that thesis is operational and Alaska Airlines will fly on fuel made right here in Washington State.”
Corporate Partnerships and market demand
The development of AirPlant One relied heavily on early demand signals from major corporate partners. In 2022, Alaska Airlines and Microsoft committed to purchasing the facility’s future output, providing the commercial foundation necessary to secure project financing. Alaska Star Ventures, the airline’s investment arm, also participated in Twelve’s recent funding rounds.
Ryan Spies, Managing Director of Sustainability for Alaska Airlines, noted that the partnership demonstrates how collaboration can advance SAF technology while diversifying fuel supply chains and strengthening energy security.
Microsoft is utilizing a book-and-claim accounting model to apply the environmental attributes of the E-Jet fuel toward reducing its reported business travel emissions. Melanie Nakagawa, Chief Sustainability Officer at Microsoft, stated that the company’s investment helps scale energy solutions and lays the groundwork for cleaner aviation globally.
AirPro News analysis
The activation of AirPlant One represents a critical pivot point for the US sustainable aviation fuel market. While biomass-derived SAF currently dominates the limited global supply, agricultural and waste feedstock constraints will eventually cap its scalability. Power-to-liquid synthetic fuels offer a theoretically limitless production ceiling, provided sufficient renewable energy and carbon capture infrastructure exist.
We view the localized production aspect as increasingly vital. As international Regulations begin mandating physical SAF blending at specific airports rather than relying entirely on book-and-claim credits, domestic facilities like AirPlant One will become essential infrastructure. The ability to offer airlines decade-long fixed fuel prices could also fundamentally alter airline cost structures if power-to-liquid production reaches parity with conventional jet fuel volumes.
Sources: Twelve Benefit Corporation
Photo Credit: Twelve Benefit Corporation
Sustainable Aviation
Airbus Safran Technip Tereos Launch SAF Joint Venture France
Four European firms form Rebound JV to produce 160,000 tons of SAF annually at Dunkirk using Alcohol-to-Jet technology.

Four major European aerospace and energy companies announced an agreement on June 9, 2026, to establish a joint venture aimed at producing 160,000 tons of Sustainable Aviation Fuel (SAF) annually in Northern France. The partnership between Technip Energies, Airbus, Safran, and Tereos will create a new entity named Rebound, focusing on the Alcohol-to-Jet (AtJ) production pathway at the Port of Dunkirk.
According to a press release issued by Airbus, the initiative is designed to secure localized production of advanced ethanol from agricultural and forestry residues. The facility aims to address the European Union (EU) ReFuelEU Aviation regulation, which mandates a 6 percent SAF blending target by 2030 and a 70 percent target by 2050.
Scaling Alcohol-to-Jet technology
The Rebound facility is projected to be one of the largest SAF plants in Europe, targeting an annual output of 160,000 tons. The project covers the entire value chain, from securing agricultural feedstock to delivering the final aviation fuel to operators. The joint venture is expected to be finalized in the second half of 2026, subject to customary closing conditions and regulatory approvals.
Technip Energies Chief Strategy and Sustainability Officer Benjamin Lechuga described the AtJ pathway as a credible and scalable route to decarbonize the aviation sector. Tereos Chief Strategy Officer Jérôme Bos noted that the project aligns with efforts to create low-carbon industrial value chains utilizing agricultural production.
Regulatory mandates and European energy sovereignty
The regulatory framework established by the EU is expected to drive an eightfold increase in SAF demand between 2030 and 2050. In response to these requirements and global headwinds facing renewable energy, the Rebound joint venture is explicitly framed around strengthening European energy supply security and sovereignty.
“The Rebound project is a vote of confidence in SAF and in Europe’s ability to be a leader in the journey to decarbonise aviation,” stated Julie Kitcher, Chief Sustainability Officer and Communications at Airbus.
Safran Chief Sustainability Officer Nathalie Stubler added that developing SAF at scale is essential for the industry and that the project brings together necessary French and European expertise to support a competitive domestic fuel market.
AirPro News analysis
We view the formation of the Rebound joint venture as a direct industrial response to the aggressive timelines set by the ReFuelEU Aviation mandate. While aerospace manufacturers like Airbus and Safran do not traditionally produce fuel, their direct investment in the Rebound project highlights the critical bottleneck that SAF supply presents to their long-term decarbonization commitments. By partnering with energy and agricultural specialists like Technip Energies and Tereos, the aerospace sector is attempting to vertically integrate the SAF supply chain to ensure the 2030 and 2050 blending targets remain viable. The choice of the Alcohol-to-Jet pathway also indicates a strategic pivot toward mature, scalable technologies that can utilize existing European agricultural infrastructure without waiting for next-generation synthetic fuel pathways to mature.
Sources: Airbus
Photo Credit: Airbus
Sustainable Aviation
KLM Cityhopper Flies Hamburg on 5% Synthetic Kerosene Blend
KLM Cityhopper completed a commercial e-SAF flight to Hamburg on June 8, 2026, highlighting supply and cost barriers ahead of EU mandates.

KLM Cityhopper operated the first commercial passenger flight to Germany utilizing a 5 percent blend of synthetic kerosene on June 8, 2026, demonstrating the technical viability of power-to-liquid fuels while exposing severe supply constraints ahead of upcoming European mandates.
The flight traveled from Amsterdam Airport Schiphol (AMS) to Hamburg Airport (HAM). According to a press release issued by KLM Royal Dutch Airlines, the operation was a collaborative effort involving synthetic fuel producer INERATEC, blending partner MB Energy, and the destination Airports.
Advancing power-to-liquid aviation fuels
The aircraft was refueled at Schiphol with 200 liters of synthetic kerosene, commonly referred to as e-SAF. This volume constituted a 5 percent blend with conventional fossil kerosene. INERATEC manufactured the synthetic fuel, while MB Energy managed the blending process prior to refueling.
Synthetic kerosene offers a potential lifecycle emissions reduction of more than 90 percent compared to traditional fossil fuels. The power-to-liquid process utilizes renewable electricity to combine hydrogen and captured carbon dioxide into a drop-in aviation fuel.
INERATEC Co-founder and CEO Tim Boeltken emphasized the immediate readiness of the technology following the successful operation.
“We are ready to deliver. Today’s flight, with our Chief Commercial Officer Maximilian Backhaus on board during a regular passenger service, clearly shows that power-to-liquid fuels are safe, available, and already operationally viable today. This is just the beginning of many applications we will see this year across various sectors,” Boeltken stated.
Scaling challenges and European mandates
While the Hamburg flight proved the operational concept, KLM used the milestone to highlight the stark economic and logistical hurdles facing the industry. The European Union has established a sub-target mandate requiring a 1.2 percent e-SAF blend across the aviation sector by 2030.
Currently, synthetic kerosene production remains highly constrained. The financial barriers are equally significant. KLM reported that e-SAF currently costs four times as much as standard Sustainable Aviation Fuel (SAF) and eight times as much as conventional fossil kerosene.
KLM Royal Dutch Airlines CEO Marjan Rintel, who also chairs Project SkyPower, noted the discrepancy between regulatory goals and industrial reality.
“As CEO of KLM and chair of Project SkyPower, I believe e-SAF can make a real difference in making aviation more sustainable. KLM already pioneered a passenger flight on e-SAF in 2021, from Amsterdam to Madrid. Today’s flight to Hamburg once again shows that flying on synthetic kerosene is technically possible. But the reality is that the availability of e-SAF lags far behind ambition,” Rintel said.
AirPro News analysis
The most telling metric from the June 8 operation is not the successful flight itself, but the volume of synthetic fuel utilized. In 2021, KLM pioneered its first commercial e-SAF flight from Amsterdam to Madrid using 500 liters of synthetic kerosene. Five years later, the Hamburg flight utilized only 200 liters.
This 60 percent reduction in available test volume over a half-decade underscores the severe scalability crisis facing power-to-liquid fuels. We view the 2030 European Union mandate of a 1.2 percent e-SAF blend as highly vulnerable to supply chain realities. If a major flag carrier like KLM is explicitly highlighting the fact that current production is only a fraction of what is required, regulators may eventually be forced to reevaluate the timeline or heavily subsidize production to bridge the eight-fold cost gap with fossil fuels.
Sources: KLM Royal Dutch Airlines
Photo Credit: KLM Royal Dutch Airlines
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