The aviation industry, a substantial contributor to global carbon emissions, stands at a critical juncture in the fight against climate change. As engineers, we have a pivotal role in shaping a sustainable future, and one of the most promising pathways lies in the adoption of Sustainable Aviation Fuel.

SAF is produced from non-fossil feedstocks such as used cooking oil, animal fats and agricultural residues, offering a lower carbon footprint compared to conventional jet fuels. SAF can reduce the aviation sector's greenhouse gas emissions by up to 80% over its lifecycle, making it a crucial tool for environmental sustainability in engineering. The Policy Address 2025 has also recognised the importance of SAF, committing to the SAF industry chain in the Greater Bay Area and the establishment of a specified target SAF consumption ratio for flights departing from Hong Kong International Airport by 2030.

However, the integration of SAF into the aviation industry is not without its challenges. From an engineering perspective, the primary hurdles include the scalability of production technologies, the cost-effectiveness of SAF and the fuel distribution infrastructures.

To address these challenges, engineers are working on multiple fronts:

Innovation in Production: Developing more efficient processes for converting biomass and waste into high-quality fuel is crucial. Advances in biochemical and thermochemical conversion technologies can increase yields and reduce costs, making SAF a more viable option.

Infrastructure Adaptation: Modifying existing fuel supply chains to handle SAF requires engineering solutions to ensure that SAF can be distributed and used without significant changes to existing infrastructure. This includes refining methods as well as the logistics of storing and transporting the fuel.

Regulatory and Standards Development: Engineers also contribute to defining and implementing standards and regulations that ensure the safe and effective use of SAF. This involves establishing criteria for sustainability and emissions reductions that align with global climate goals.

The role of engineers transcends merely solving technical problems; it extends to collaboration with policymakers, businesses, and the public to create a holistic approach to SAF adoption. By engaging in cross-disciplinary efforts, engineers help drive the policy changes necessary to secure financial and regulatory support for SAF technologies.

In conclusion, while SAF is not the sole solution to aviation’s environmental impact, it is a critical component of a broader strategy to reduce emissions. As engineers, our ability to innovate and implement practical solutions to complex problems will be crucial in realising the potential of SAF to mitigate climate change. This endeavour will not only help align the aviation industry with international environmental targets but also propel it towards a more sustainable trajectory.

This article is contributed by Ir Leung Chi Fung with the coordination of the Environmental Division.