Why hasn't sustainable aviation fuels taken off? | Climate Conversations podcast

Key Concepts:

• Sustainable Aviation Fuels (SAF): Alternative jet fuels made from sustainable sources like used cooking oil and animal tallow, aiming to reduce CO2 emissions.
• Net Zero Carbon Emissions: Achieving a balance between carbon emissions produced and carbon emissions removed from the atmosphere.
• Multicropping: Growing crops for SAF production alongside primary food crops to maximize land use efficiency.
• Green Hydrogen: Hydrogen produced using renewable energy sources, considered a clean energy carrier.
• Feedstock: Raw material used to produce SAF, such as used cooking oil or animal tallow.
• IATA (International Air Transport Association): Trade association representing airlines worldwide.
• ICAO (International Civil Aviation Organization): A UN specialized agency, promoting safe and orderly development of international civil aviation.

1. Aviation Industry's Climate Action and Current Challenges

• The aviation industry contributes about 3% of global carbon emissions, making decarbonization efforts crucial.
• Initial enthusiasm for rapid progress in clean aviation has waned, with recent headlines indicating setbacks.
• Examples of negative headlines:
  • "Global air travel surges while switch to clean jet fuel lags" (Bloomberg)
  • "US objects to recommendation on sustainable Aviation fuels" (Reuters)
  • "Airbus delays hydrogen plane amid quote huge unquote technological challenges" (Bloomberg)
• A general lack of ambition and reluctance to overcome hurdles are observed in the industry.
• The global political environment, particularly the Trump Administration's stance, is seen as contributing to this backslide.

2. Sustainable Aviation Fuels (SAF) and Their Challenges

• Global air travel has surpassed prepandemic levels, increasing 10% from the previous year.
• SAF consumption is significantly below expectations, constituting only 0.3% of commercial aviation fuel consumption last year.
• IATA aims for a 10% SAF usage by 2030 and Net Zero carbon emissions by 2050, relying on SAF and new technologies.
• The US government objects to multicropping for SAF production, citing benefits for Brazil and harm to American farmers.
• SAF production faces challenges:
  • High production costs, nearly double that of conventional fuel.
  • Limited supply and difficult sourcing of feedstock materials.
  • Few companies producing SAF at scale (just shy of 20).
  • Singapore has one of the largest SAF production plans, operated by Neste (Finnish company).
• SAF promises to produce up to 80% less CO2 emissions versus conventional fuels.

3. Hydrogen Aircraft Development and Setbacks

• Airbus is facing major technological hurdles in developing hydrogen-powered aircraft.
• The entry of a commercial hydrogen jet is delayed by 5 to 10 years due to challenges in building hydrogen infrastructure and supply.
• Boeing, a major competitor, is not currently planning a hydrogen plane.

4. Airline Companies Reeling Back Ambitions

• Air New Zealand ditched its 2030 climate target.
• Southwest Airlines is cutting jobs in its sustainable fuel operations and selling a Renewables company acquired less than a year ago.

5. Potential for Growth in Sustainable Fuels

• Global SAF production capacity has more than doubled between 2021 and 2024 (Bain & Company report).
• Global demand for SAF and renewable diesel could double the size of today's ethanol and biodiesel markets by 2050.
• The profit pool from heightened demand could be between $100 billion and $150 billion USD.
• Countries like the Philippines are eyeing opportunities to become SAF producers.
• Increased players could lead to tipping points, making SAF more accessible and affordable.
• Approximately 190 companies have expressed intent to produce SAF across over 300 locations.

6. Quiz Question and Answer

• Question: At peak times, how many planes are estimated to be in the sky?
• Answer: Approximately 16,000 commercial aircraft at peak times (typically Friday afternoons in the Northern Hemisphere during summer months). Normal times see around 8,000 to 10,000 planes in the sky.

7. Synthesis/Conclusion

The aviation industry faces significant challenges in achieving its decarbonization goals. While sustainable aviation fuels offer promise, they are hindered by high costs, limited supply, and political obstacles. Hydrogen aircraft development is also facing technological hurdles and delays. Despite these setbacks, there is potential for growth in the SAF market, with increasing production capacity and interest from various companies and countries. The industry's progress will depend on overcoming these challenges and fostering innovation to make sustainable aviation a reality.