Ilminnafik N, Prasetiyo DHT, Welayaturromadhona, Kartini AM, Palupi B, Suyitno. Optimization of biodiesel synthesis process from nyamplung (calophyllum inophyllum) oil using thermal air sparging method. Mech. Eng. for Soc. and Ind. 2026;6(1):211-229. doi:10.31603/mesi.15335