Fatty Acid Deoxygenation in Supercritical Hexane over Catalysts Synthesized Hydrothermally for Biodiesel Production.

Deposition of catalytically active metal‐containing compounds on solid porous supports by using superheated (subcritical) water is a promising way to produce materials with unique physicochemical and catalytic properties. The hydrothermal method has been found to give catalysts with high surface area, fine distribution of the active phase, and high catalytic activity. In the current work, the catalytic activities of 10 % Ni and 10 % Co deposited on hyper‐cross‐linked polystyrene (HPS) by the hydrothermal method in the supercritical deoxygenation of fatty acids were compared. 10 % Ni/HPS was found to be the most active catalyst in the deoxygenation of stearic acid in supercritical n‐hexane. Supported metal catalysts play an important role in chemical technology, and hydrothermal synthesis of catalysts has recently attracted much attention. Cobalt and nickel nanoparticles were deposited on a hyper‐cross‐linked polystyrene matrix by a hydrothermal method, and the catalytic activity of the resulting catalysts was evaluated in the deoxygenation of fatty acids in supercritical n‐hexane. [ABSTRACT FROM AUTHOR]