Siemens and CAPHENIA Partner to Scale Sustainable Aviation Fuel Production

Industrial technology firm Siemens has entered a strategic partnership with German cleantech startup CAPHENIA to accelerate the industrial-scale production of Sustainable Aviation Fuel (SAF). The collaboration focuses on scaling up the manufacturing of synthesis gas (syngas), a critical precursor for renewable kerosene, by combining CAPHENIA’s novel reactor technology with Siemens' digitalization and automation portfolio.

The partnership aims to address the most significant bottleneck in the decarbonization of the aviation industry: the lack of SAF production capacity. According to the International Air Transport Association (IATA), SAF could contribute around 65% of the emissions reduction needed for aviation to reach net-zero by 2050. However, current SAF production accounts for less than 1% of global kerosene demand, highlighting the urgent need for scalable and efficient manufacturing solutions.

Technology and Process Efficiency

At the core of the partnership is CAPHENIA’s proprietary Plasma Boudouard Reactor (PBR). This technology converts biomethane into synthesis gas—a mixture of hydrogen and carbon monoxide—using a plasma process at temperatures of approximately 1,500 degrees Celsius. According to a Siemens press release, this method achieves a process efficiency of more than 86%. The resulting syngas can then be converted into liquid hydrocarbons suitable for jet fuel via the established Fischer-Tropsch process, a method approved under ASTM International standards for aviation fuels.

The collaboration will leverage Siemens' expertise to standardize and modularize CAPHENIA's production plants. By creating a digital twin of the PBR and the overall plant, the partners can simulate, optimize, and streamline the entire process before physical construction. This approach is designed to significantly reduce commissioning times and enable a rapid global rollout of standardized SAF production facilities.

Digitalization as a Scaling Catalyst

Siemens will implement its Siemens Xcelerator portfolio, including process control systems and simulation software, to automate and digitalize the production process. This digital framework is critical for ensuring consistent quality, operational efficiency, and the ability to replicate plants quickly worldwide.

"Decarbonising aviation cannot be achieved without synthetic fuels," said Christian Gückel, Head of Vertical Chemicals at Siemens Digital Industries. "Demand for SAF is growing exponentially, yet production capacity urgently needs to be ramped up. This is exactly where Siemens comes in: with our digitalisation and automation solutions, we are making CAPHENIA's technology industrially scalable and thus accelerating its global market ramp-up."

The partnership represents a key application of Power-to-Liquid (PtL) principles, a pathway for creating synthetic fuels from renewable energy and captured carbon sources. While PtL is considered a highly sustainable method, its complexity and cost have so far limited its industrial application.

Industry Impact and Market Outlook

The aviation industry is under immense pressure to reduce its environmental impact, as it accounts for approximately 2.5% of global energy-related CO2 emissions, according to the IEA. While SAF can reduce lifecycle CO2 emissions by up to 80% compared to conventional jet fuel, its high cost and limited availability remain major hurdles. This initiative directly targets the supply-side constraint.

The global aviation industry is projected to require around 500 million tons of SAF annually by 2050 to meet its decarbonization targets. The market for SAF is forecast to expand accordingly, with Persistence Market Research projecting its value to grow from $2.1 billion in 2025 to $25.2 billion by 2032.

Dr. Mark Misselhorn, founder and CEO of CAPHENIA, emphasized the strategic importance of speed and industrial readiness. "This partnership shows how technology leaders are working together to drive forward the energy transition," he stated. "The market for sustainable aviation fuels will not grow evenly—it will fragment. Those who scale quickly, those who are industrial-ready, those who have the right partners will lead."

Why This Matters

This partnership between an industrial giant and a technology innovator provides a potential blueprint for overcoming the SAF production shortfall. By combining a highly efficient reactor technology with proven digitalization and automation solutions, Siemens and CAPHENIA aim to create a standardized, replicable model for SAF plants. If successful, this approach could significantly accelerate the availability of renewable kerosene, making it a more viable tool for airlines worldwide in their efforts to achieve net-zero carbon emissions.

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