Gevo Licenses ORNL Catalyst to Cut Sustainable Aviation Fuel Costs

A new single-step catalyst technology licensed by biofuels company Gevo from the Oak Ridge National Laboratory (ORNL) could significantly reduce the cost of producing Sustainable Aviation Fuel (SAF). The technology converts ethanol directly to olefins (ETO), key precursors for jet fuel, in a single reactor pass, simplifying the traditional multi-stage Alcohol-to-Jet (ATJ) process.

This development addresses a primary barrier to widespread SAF adoption: cost. By streamlining production, the technology aims to make SAF more economically competitive with conventional jet fuel, a crucial step for the aviation industry's goal of achieving net-zero carbon emissions by 2050. The initiative is supported by the US Department of Energy (DOE) through its Technology Commercialization Fund, which is funding a three-year Cooperative Research and Development Agreement (CRADA) between ORNL and Gevo to scale the technology.

Technology and Commercialization

The core innovation is a catalyst that facilitates the Ethanol-to-Olefins conversion in one step. Traditional ATJ pathways require multiple reactors and significant energy inputs to complete the chemical conversion. The ORNL process promises a more efficient and less capital-intensive route to producing the hydrocarbon blendstocks needed for SAF. According to the DOE, global demand for jet fuel is projected to grow from 106 billion gallons in 2019 to 230 billion gallons by 2050, intensifying the need for scalable renewable alternatives.

The partnership between Gevo and ORNL is designed to move the catalyst from the laboratory to industrial application. Andrew Sutton, a senior scientist at ORNL, stated, "This partnership will streamline the transition of ORNL's catalyst technologies from lab scale to pilot-scale reactors. By demonstrating industrial viability, our goal is to accelerate the commercialization of this technology in the U.S., boosting global competitiveness and domestic production of aviation fuel."

Industry Impact

The primary stakeholders impacted are airlines, represented by groups like the International Air Transport Association (IATA), which covers over 80% of global air traffic. These carriers have committed to aggressive decarbonization targets and are reliant on securing massive volumes of affordable SAF. A breakthrough in production cost could accelerate their transition away from fossil fuels. This development supports the goals of the US SAF Grand Challenge, which calls for a domestic supply of at least 3 billion gallons of SAF annually by 2030.

Conversely, the increasing viability of SAF poses a long-term challenge to traditional fossil jet fuel refiners, whose market share is threatened by the energy transition. The technology also has applications beyond aviation; olefins are foundational chemicals for the global plastics market, which ORNL forecasts to be worth more than $1.3 trillion by 2033.

A More Efficient Pathway

This single-step ETO process represents a significant evolution in biofuel production. The commercial viability of ethanol as a SAF feedstock was recently demonstrated in January 2024, when LanzaJet opened the world's first commercial-scale ethanol-to-SAF facility in Georgia. That facility utilizes a multi-step ATJ process. The ORNL technology licensed by Gevo aims to improve upon this model by collapsing the production chain, which could result in lower operational and capital expenditures.

However, the reliance on ethanol feedstock is not without criticism. Some environmental groups have raised concerns about the lifecycle emissions and land-use impacts of sourcing ethanol from crops, highlighting the ongoing "food vs. fuel" debate. The long-term sustainability will depend on sourcing ethanol from non-food biomass or through carbon capture methods.

What Comes Next

Under the three-year CRADA, Gevo and ORNL will work to prove the technology's scalability. The key predictive milestone is the completion of pilot-scale reactor testing, which is expected by 2029. Successful demonstration at this scale would be a critical step toward the design and construction of a full-scale commercial production facility.

Why This Matters

This technological advancement is significant because it directly targets the economic viability of Sustainable Aviation Fuel, the most critical lever for decarbonizing air travel in the medium term. By simplifying the chemical conversion process, the ORNL catalyst could unlock scalable production and help airlines meet ambitious net-zero targets. The partnership between a national laboratory and a commercial biofuels company exemplifies the public-private collaboration required to transition foundational technologies from research to market impact.