The overuse of non-renewable resources has triggered a significant decline in energy reserves, making the pursuit of renewable energy alternatives more crucial than ever. One such promising alternative is biodiesel, derived from vegetable oil or animal fat. Despite its potential, biodiesel production faces challenges, including high costs and environmental concerns. A viable solution to these problems lies in the use of biochar produced from agricultural waste, such as rice straw, which is plentiful but often underutilized.

Biochar serves as a catalyst in biodiesel production, enhancing efficiency and sustainability. This approach not only addresses the environmental issues associated with traditional energy sources but also provides a method to manage agricultural waste effectively. A bibliometric analysis using the VOSviewer tool, which examined research from 2009 to March 2024, highlights the growing interest in this field. According to the analysis, which retrieved data from the Scopus database, 303 documents have been published that discuss the application of biochar in biodiesel production.

The analysis provides insights into research trends, collaborations between scientists, and contributions from various institutions, helping researchers identify gaps in the literature and laying a solid foundation for future studies. It is clear from this research that the integration of biochar in biodiesel production is not only a step towards more sustainable energy practices but also a strategic move to enhance global energy security. This emerging field promises to transform both waste management and energy production, steering both towards a more sustainable and environmentally friendly direction.