▎ACHIEVEMENTS

As global energy instability intensifies, researchers at National Taiwan University have developed a portable biodiesel fuel production system compact enough to fit inside a backpack — a breakthrough that could significantly accelerate emergency energy access in disaster zones and remote regions.

Led by Prof. Ya-Yu Chiang at National Taiwan University’s (NTU) Department of Mechanical Engineering, the research team created what they describe as an “Energy Espresso Machine”: a rapid-deployment system capable of producing high-quality biodiesel from waste oil and non-edible crops. The project, spotlighted as the cover story of Green Chemistry in November 2025, was developed in collaboration with Prof. Yi-Chun Chen’s team at National Chung Hsing University (NCHU) and Prof. Penjit Srinophakun’s team at Kasetsart University (KU) in Thailand.

The heart of the technology is the world’s first “Helix Wire Liquid-Liquid Phase Separator,” which enables continuous purification of viscous liquids in micro-scale environments. Using precise Laplace pressure control, the system produces a biodiesel yield of 91.14 percent, with fuel quality surpassing Taiwan’s CNS 15072 standards and compatible with existing diesel engines.

Sustainability is hardcoded into the system's design. Detailed Life Cycle Assessments (LCA) demonstrate that this continuous-flow process conserves 35 percent more water and maintains a significantly lower carbon footprint than conventional batch manufacturing methods. In partnership with NCHU, the researchers also converted crude glycerin byproducts into flexible polyurethane foam, further advancing the circular economy approach.

Prof. Chiang remarked that the system was designed to strengthen decentralized energy resilience, particularly for off-grid communities, remote islands, and emergency response scenarios where fuel access may be disrupted.