A Brief Review of the Supercritical Antisolvent (SAS) Technique for the Preparation of Nanocatalysts to Be Used in Biodiesel Production

In an era where sustainability is becoming the main driving force for research and development, supercritical fluids-based techniques are presented as a very efficient alternative technology to conventional extraction, purification, recrystallization processes. Supercritical antisolvent (SAS) precipitation novel technique that can replace liquid techniques. Additionally, through optimization of operating conditions, morphology, particle size, size distribution nanoparticles be controlled. As antisolvent, carbon dioxide (scCO2) far more sustainable than its counterparts; not only does it have critical point (304 K 73.8 bar) on phase diagram allows processes developed so close room temperature, but also recovery and, consequently, precipitated solute purification stage considerably simpler. This used efficiently preparing nanocatalysts in biodiesel production