Knowledge Hub

Sustainable aviation fuel, also known as SAF, is a low-carbon replacement for fossil-based jet fuel. SAF is made from renewable feedstocks like waste fats, oils, and greases and emits up to 85% fewer carbon emissions over its life cycle compared to conventional jet fuel. Sustainable aviation fuel is a drop-in fuel solution, meaning it can be used in existing aircraft engines and infrastructure without any modifications.  

The lifecycle carbon emissions of sustainable aviation fuel are significantly less than fossil-based jet fuel. Depending on how it’s made, SAF emits up to 85% fewer carbon emissions over its life cycle compared to conventional jet fuel. Conventional jet fuel is a fossil fuel and contributes to the global level of CO2 by emitting carbon that was sequestered underground.

While eight technology pathways have been certified to produce sustainable aviation fuel, hydrotreated esters and fatty acids (HEFA), alcohol to jet (AtJ) and power to liquid (PtL) are the three most common.

Right now, HEFA is the only method that can produce commercial-scale volumes of sustainable aviation fuel, and it is used for the vast majority (95%) of all SAF-powered flights. HEFA SAF is refined from vegetable oils (such as soybean, corn, and canola oil), waste oils (like used cooking oil), and animal fats via a process that uses hydrogen (hydrodeoxygenation). World Energy focuses on this production method since the technology is more mature and reliable. It is also the easiest to implement because existing equipment can be adapted.

Yes. SAF is a drop-in fuel that can be used in existing aircraft with no modifications.  World Energy’s sustainable aviation fuel is currently approved at a 50/50 blend level with conventional jet fuel for commercial use.    

World Energy’s carbon intensity score leads the industry, and we comply with the most rigorous environmental standards. The management systems for our facilities and feedstocks are certified by the Roundtable on Sustainable Biomaterials (RSB), an internationally recognized and trusted standards certification system organization.   

Our Sustainable Aviation Fuel (SAF) is certified in compliance with the Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA). It also follows RSB Global standards. This ensures rigorous accounting for the carbon inputs and other sustainability-related impacts associated with our fuels.    

No. According to the International Air Transport Association (IATA), SAF accounted for only 0.2 percent of global jet fuel use in 2023. Collaborations and investments are key to making decarbonization a reality in aviation. Sustainable aviation fuel certificates (SAFc) are one of the fastest ways to help scale SAF production and technologies.  

Delivered via Book & Claim, SAF certificates (SAFc) provides an efficient solution for displacing fossil-based jet fuel with SAF. SAFc deliver decarbonization benefits for Scope 1 or Scope 3 emissions in any sector.  

By purchasing SAFc, a company is purchasing the environmental benefits of SAF. Instead of transporting the physical fuel across the country, the fuel is used at an airport close to a production facility, minimizing the logistical burden, transport costs, and emissions.  

Book & Claim is a chain of custody model that allows us to decouple and track SAF’s environmental attributes separately from the physical fuel. With Book & Claim, the environmental attributes of the fuel are calculated, transparently tracked, and allocated to the appropriate owner. Book & Claim is recognized as a credible and necessary method to reduce supply chain emissions and scale the market for sustainable fuels.   

Insets are a mechanism that delivers carbon reduction in the same sector the emissions were created, giving companies the power to address their Scope 3 emissions. Sustainable aviation fuel certificates (SAFc) are a type of inset because they deliver carbon reduction within the aviation industry.  

Insets and offsets are both tools a company can use to reduce its carbon footprint, but they differ in both approach and impact.  

Insetting is a long-term strategy that requires deep commitment and planning. It enhances a company’s overall sustainability by reducing Scope 3 emissions and strengthening value chain resilience. 

Offsetting does not contribute to reducing operational emissions. It’s easier to implement and involves investing in external projects to counteract CO2 or GHG emissions, like renewable energy or reforestation.  

Renewable diesel (RD) is a 99.9% renewable fuel made from renewable inputs, including waste fats, oils, and greases. RD is chemically the same as petroleum diesel and can help reduce emissions by approximately 85%.  

At 100%, RD contains no aromatics or impurities and allows fuel to combust at maximum efficiency. It offers better performance, reduced maintenance, cleaner burning, and no odor. RD also decreases the frequency of injector maintenance and diesel particulate filter replacements.   

RD is designed as a drop-in fuel solution for heavy duty trucks and any marine vessel that can operate on #2 diesel fuel. It can be used in all modern diesel engines. 

Green hydrogen is hydrogen that’s produced by using zero-carbon electricity to split water into hydrogen and oxygen. Green hydrogen can be used to replace fossil fuels in industries that are hard to electrify, like shipping, steel, and other hard-to-abate sectors.  

 Renewable naphtha is a fuel component that can be used to decrease the carbon intensity from various chemical processes including the creation of plastic, chemicals, and consumer goods.