The increasing concentration of greenhouse gases in the atmosphere has led to an urgent demand for reducing the consumption of conventional fossil fuels and substituting them with alternative energy sources. Such a transition is expected to contribute significantly to the restoration of the Earth's ecological balance. Among the available renewable energy options, biofuels have demonstrated the greatest potential in recent years. The utilization of plant-derived biomass for fuel production offers several advantages, the most important of which is the environmental safety of biomass-based energy systems. A major technological trend of the past two decades has been the development of low-waste and zero-waste production processes. In this regard, the synthesis of biofuels from waste vegetable oils-one of the primary waste-management challenges for restaurant and café networks-has become increasingly promising. Nevertheless, despite their notable advantages, biofuels also exhibit several limitations. These include relatively poor storage stability (due to rapid oxidative degradation), high ignition temperature, elevated viscosity, and other physicochemical constraints.