This article is based on an official press release from Swiss International Air Lines (SWISS).

On May 13, 2026, Swiss International Air Lines (SWISS), in coordination with its parent company the Lufthansa Group, announced a strategic partnerships with Zurich-based climate tech company Metafuels. According to the official press release, the collaboration is designed to accelerate the industrial-scale production of synthetic Sustainable Aviation Fuel (e-SAF). By securing early access to Metafuels’ proprietary technology, SWISS aims to proactively position itself ahead of strict European synthetic fuel mandates set to take effect in 2030.

The agreement outlines that SWISS and the Lufthansa Group intend to commit to long-term procurement contracts with Metafuels. This move highlights a growing industry trend where Airlines are partnering directly with deep-tech Startups to ensure future supply chains. The partnership also underscores Switzerland’s emerging role as a climate innovation hub, leveraging local research institutions to solve global decarbonization challenges.

Current global production volumes of synthetic aviation fuels are vastly insufficient to meet upcoming political and environmental targets. By collaborating with Metafuels, SWISS is taking a direct role in bringing viable synthetic SAF solutions to the commercial market.

The Shift to Synthetic Aviation Fuels

Overcoming the Limitations of First-Generation SAF

To understand the significance of this partnership, we must look at the limitations of current sustainable aviation fuels. Today, the vast majority of commercially available SAF is produced via the HEFA process (Hydroprocessed Esters and Fatty Acids), which relies heavily on waste oils and animal fats. Because these biological feedstocks are strictly limited in global supply, the aviation industry is being forced to transition to synthetic fuels, or e-SAF, to achieve true scalability.

According to the provided research data, Metafuels has developed a proprietary catalytic technology known as aerobrew. This process efficiently converts green methanol into aviation-grade jet fuel. The green methanol itself is produced by using renewable electricity to split water into green Hydrogen, which is then combined with carbon dioxide captured directly from the atmosphere or from biogenic waste sources.

Crucially, the resulting synthetic SAF is a “drop-in” fuel. This means it can be blended with conventional jet fuel, currently up to a 50 percent regulatory limit, and utilized in existing airport infrastructure and Commercial-Aircraft engines without requiring any technical modifications.

Scaling Up Production and Infrastructure

From Demonstration to Commercial Scale

Metafuels, founded in 2021 by Saurabh Kapoor, Leigh Hackett, and Ulrich Koss, has been rapidly expanding its operational footprint. Industry reports indicate that in early 2026, the company raised between $22 million and $24 million to pioneer its technology at a commercial scale, followed by a €1.92 million grant from the Dutch government in April 2026.

Currently, Metafuels operates a demonstration plant at the Paul Scherrer Institute in Villigen, Switzerland. This facility is capable of producing up to 50 liters of SAF per day to validate the aerobrew process. Simultaneously, the company is developing its first commercial-scale facility, dubbed “Project Turbe,” located in the Port of Rotterdam. According to project outlines, this facility aims to produce 10 tons of e-SAF per day by 2028, scaling up to 100 tons per day by 2031.

For the Lufthansa Group, which has committed to a carbon-neutral footprint by 2050, securing output from these future facilities is critical. The group has already seen success with its “Green Fares,” which allow passengers to offset flight emissions. In 2025, nearly 7 million Lufthansa Group passengers opted for these sustainable travel options, demonstrating strong consumer demand for decarbonized air travel.

“Future availability of sustainable fuels at sufficient scale will only be possible if investments in technologies and partnerships are made today. That is exactly what we are doing with Metafuels. We do not want to wait on the sidelines, but actively contribute to making synthetic fuels market-ready and scalable…”

Regulatory Pressures Driving the Market

Meeting the ReFuelEU Mandates

The driving force behind this procurement strategy is the impending regulatory landscape in Europe. Under the European Union’s “Fit for 55” package, the ReFuelEU Aviation Mandate legally requires aviation fuel suppliers to blend a minimum percentage of SAF into the fuel provided at EU airports.

The mandate began at a 2 percent overall SAF requirement in 2025 and will rise to 6 percent in 2030, eventually reaching 70 percent by 2050. More importantly for this partnership, the legislation includes a specific sub-mandate for synthetic aviation fuels (e-kerosene). Starting in 2030, 1.2 percent of all aviation fuel must be synthetic, rising to 35 percent by 2050.

“This agreement with SWISS and the Lufthansa Group is both a milestone for us and a clear affirmation of the role that synthetic SAF will play in the future of aviation… With both rising demand projected and tighter regulatory provisions ahead, synthetic fuels will only gain in importance.”

AirPro News analysis

As we analyze the broader aviation market, it is clear that the race for 2030 compliance has officially begun. SWISS’s partnership with Metafuels is a direct strategic maneuver to secure the supply needed to meet the 1.2 percent synthetic quota. Because the current global supply of e-SAF is virtually non-existent compared to projected future demand, airlines that fail to lock in early procurement contracts risk severe compliance penalties or exorbitant spot-market fuel prices by the end of the decade. By partnering with a local deep-tech startup, SWISS is not only hedging its regulatory risks but also investing in the localized energy security of the European aviation sector.

Frequently Asked Questions

What is e-SAF?

e-SAF, or synthetic Sustainable Aviation Fuel, is a type of aviation fuel made from renewable electricity, water, and carbon dioxide, rather than biological waste products like used cooking oil. It is considered infinitely scalable compared to first-generation SAF.

Why is SWISS partnering with Metafuels now?

SWISS is securing early access to Metafuels’ future production capacity to ensure it can meet the European Union’s strict mandate requiring 1.2 percent of all aviation fuel to be synthetic by the year 2030.

Can e-SAF be used in current airplanes?

Yes. The synthetic fuel produced by Metafuels’ aerobrew process is a “drop-in” fuel, meaning it can be blended with traditional jet fuel (up to a 50 percent limit) and used in existing aircraft engines without any modifications.

Sources: Swiss International Air Lines (SWISS) Press Release

This article is based on an official press release from Pilatus Aircraft.

Swiss aerospace manufacturers Pilatus Aircraft has unveiled its latest sustainability and manufacturing initiative, dubbed “Carbon Reborn.” The program highlights the company’s dual approach to carbon: maximizing the efficiency of carbon fiber composites in its aircraft while aggressively pursuing carbon-neutral operations through innovative fuel investments.

According to the official press release, Pilatus is focusing on reducing the environmental footprint of its manufacturing processes and fleet operations. The initiative underscores the critical role of lightweight materials in modern aviation and the industry’s broader push toward de-fossilization.

Advanced Composites and Waste Reduction

Enhancing the PC-24 and PC-12

Carbon fiber reinforced polymers (CFRP) have become a cornerstone of Pilatus’s aircraft design. The company’s flagship PC-24 Super Versatile Jet relies heavily on carbon and glass-fiber components to maintain a low base weight of approximately 5.3 tons. Industry data from Pilatus’s manufacturing partners indicates that this lightweight construction is essential for the jet’s unique ability to take off from short, unpaved runways of just 890 meters.

In a company press release, Pilatus emphasized its commitment to optimizing these materials. To address the environmental impact of composite manufacturing, the company has implemented advanced digital cutting technologies. According to manufacturing partner Zünd, these highly automated systems have successfully reduced carbon fiber waste rates from 30 percent to 20 percent at Pilatus facilities.

Global Supply Chain Integration

The “Carbon Reborn” strategy also extends to Pilatus’s global supply-chain. The company recently expanded its partnership with UAE-based Strata Manufacturing to produce composite trailing edge components for the PC-12 turboprop. By the first quarter of 2025, Strata had delivered 590 of these critical carbon-fiber components, demonstrating the scale of Pilatus’s composite integration.

Pioneering Solar Aviation Fuels

The Synhelion Partnership

Beyond physical materials, the “Carbon Reborn” initiative addresses atmospheric carbon through a strategic investment in Synhelion, a Swiss company developing solar fuels. Pilatus aims to transition its factory flight operations to be entirely free of fossil CO2 emissions.

“We see a future in which all Pilatus factory flight operations will be free of fossil CO2 emissions…”
– André Zimmermann, VP of Business Aviation at Pilatus

Synhelion’s “sun-to-liquid” technology uses solar heat to recombine water and atmospheric CO2 into hydrocarbon fuels. According to reporting by Skies Mag, Pilatus has stated its long-term goal is to roll out this sustainable aviation fuel (SAF) alternative to its entire global customer fleet, numbering over 4,400 aircraft, within the next decade.

AirPro News analysis

The “Carbon Reborn” initiative reflects a growing trend among business aviation manufacturers to tackle sustainability from multiple angles. While traditional SAF relies on biomass, Pilatus’s investment in solar fuels acknowledges the looming supply constraints of conventional sustainable fuels. By simultaneously reducing composite manufacturing waste and investing in synthetic crude technologies, Pilatus is positioning itself ahead of stringent European environmental regulations. However, the industrial scale-up of solar fuels remains a significant financial and logistical hurdle that the broader aviation sector will need to overcome.

Frequently Asked Questions

What is the Pilatus “Carbon Reborn” initiative?

It is a comprehensive strategy by Pilatus Aircraft focusing on the efficient use and waste reduction of carbon fiber composites in manufacturing, alongside investments in carbon-neutral solar aviation fuels.

How does carbon fiber benefit the PC-24?

The use of carbon and glass-fiber components keeps the PC-24’s base weight low (around 5.3 tons), allowing it to operate on short, unpaved runways that are typically inaccessible to traditional business jets.

What are solar fuels?

Solar fuels, developed by Pilatus partner Synhelion, are created using solar heat to synthesize water and atmospheric CO2 into liquid hydrocarbon fuels, offering a carbon-neutral alternative to fossil fuels.

Sources: Pilatus Aircraft

This article is based on an official press release from the IMDEA Materials Institute and a peer-reviewed study published in Science. This article summarizes publicly available elements and public remarks.

Breakthrough in Ultralight Carbon Nanotube Fibers Promises to Reshape Aerospace and EV Wiring

Researchers in Spain have achieved a major materials science breakthrough by developing a scalable manufacturing process for carbon nanotube (CNT) fibers that rival the electrical conductivity of traditional metals at a fraction of the weight. Published in the journal Science on April 23, 2026, the study outlines a novel chemical doping method that increases the electrical conductivity of carbon nanotubes by a factor of 17.

Led by the IMDEA Materials Institute in Madrid, the research was conducted in collaboration with the Instituto de Nanociencia y Materiales de Aragón (INMA), the University of Zaragoza, Universidad Autónoma de Madrid, and Universidad Politécnica de Madrid. According to the official press release, the resulting material achieves a conductivity of up to 24.5 megasiemens per meter (MS/m) at room temperature. While this represents approximately 41 percent of the absolute conductivity of copper, the new CNT fibers are roughly six times lighter.

For industries constrained by the weight of traditional electrical wiring, such as aerospace, drone manufacturing, and electric vehicle (EV) production, this development paves the way for ultra-lightweight, high-strength alternatives to copper and aluminum.

The Science Behind the Breakthrough

Intercalation Doping Explained

Carbon nanotubes, which are essentially rolled-up sheets of graphene, possess excellent theoretical electron mobility. However, according to the research team, their practical conductivity has historically been limited by a low number of free charge carriers. To overcome this hurdle, the scientists utilized a process known as intercalation doping.

The researchers exposed commercially available, highly aligned double-walled carbon nanotube fibers to a gas containing tetrachloroaluminate (AlCl₄⁻) and excess chlorine for a period of 24 hours. The AlCl₄⁻ ions diffused into the interstitial channels between the nanotube walls, rather than entering their hollow cores. Because of the concentric arrangement of the nanotubes, these gaps are large enough to accommodate the dopant without distorting the underlying carbon structure.

“AlCl₄⁻ provides a large doping effect without increasing weight excessively, compared to other dopants we have studied,” explained lead author Ana Inés de Isidro Gómez.

This dopant acts as a noncovalent electron acceptor, drastically increasing the number of free charge carriers and boosting the material’s conductivity 17-fold without compromising its mechanical integrity.

Industry Impact and Applications

Aerospace and Electric Vehicles

Reducing the weight of electrical wiring remains a critical bottleneck in modern engineering. Heavy copper wiring limits the range of electric vehicles and reduces the payload capacity of aircraft. By replacing heavy copper harnesses with ultralight CNT fibers, manufacturers could significantly extend battery ranges and improve overall vehicle efficiency. In the aerospace and drone sectors, every gram saved in wiring translates directly to longer flight times and reduced energy consumption.

“This is the first time that researchers have produced results with CNT fibres demonstrating sufficient performance… to offer a realistic industrial alternative,” stated Dr. Juan José Vilatela, Principal Investigator at IMDEA Materials.

Power Distribution

Beyond transportation, the high strength-to-weight ratio of the new fibers makes them highly attractive for power grid infrastructure. According to the published data, the doped CNT fibers are up to five times stronger than conventional overhead power cables, which are currently limited by the sheer weight of the metal lines they must support.

Current Limitations and Future Challenges

Moisture and Heat Sensitivities

While the breakthrough is significant, the research team acknowledges current limitations that must be addressed before widespread commercialization. The doped fibers exhibit instability when exposed to humid air. However, the researchers demonstrated that when protected by a standard commercial polymer cable sheath, the fibers successfully retained 80 percent of their conductivity over a five-day testing period. Improving long-term environmental stability remains the team’s next major objective.

Additionally, independent experts have pointed out potential thermal challenges. James Elliott, a researcher at the University of Cambridge, noted that dopants in such systems can sometimes degrade or dissipate if the cable heats up significantly during high-power transmission.

“It’s a brilliant result – it’s very exciting from lots of application points of view,” remarked independent expert James Elliott.

AirPro News analysis

We observe that the true commercial value of this breakthrough lies in the metric of “specific conductivity”, the ratio of a material’s conductivity to its density. While copper remains more conductive in absolute terms (~60 MS/m compared to the CNT fiber’s 24.5 MS/m), copper is exceptionally heavy. The new CNT fibers reach a specific conductivity of 17,345 Siemens-meter squared per kilogram, exceeding both copper and aluminum. For the aviation and EV sectors, where weight is the primary enemy of efficiency, a material that conducts electricity better than copper on a per-pound basis is effectively a “holy grail.” If the IMDEA team can solve the moisture and thermal degradation issues, this technology could fundamentally alter how electrical harnesses are engineered over the next decade.

Frequently Asked Questions (FAQ)

What is specific conductivity?

Specific conductivity measures how well a material conducts electricity relative to its weight (conductivity divided by density). A material with high specific conductivity is ideal for applications where keeping weight low is just as important as transmitting power efficiently.

Why replace copper wiring?

Copper is an excellent conductor but is very heavy. In electric vehicles and aircraft, the weight of copper wiring harnesses drains batteries faster and burns more fuel. Lighter alternatives allow for longer ranges and higher payload capacities.

Are these carbon nanotube fibers ready for commercial use?

Not yet. While the manufacturing process is scalable, the fibers currently lose some conductivity when exposed to moisture or high heat. Researchers are working on protective sheathing and stabilization techniques to make them viable for long-term industrial use.

Sources: Science (DOI: 10.1126/science.aeb0673), IMDEA Materials Institute Press Release