Magnetically separable Ru-containing catalysts in supercritical deoxygenation of fatty acids.

Stepacheva, Antonina A.; Lugovoy, Yury V.; Manaenkov, Oleg V.; Sidorov, Alexander I.; Matveeva, Valentina G.; Sulman, Mikhail G.; Sulman, Esther M.

In the current paper, the possibility of the use of magnetically separable catalysts containing ruthenium oxide species in the supercritical deoxygenation of stearic acid for producing of the second generation of biodiesel is reported. Three different supports (silica, ceria, and hypercrosslinked polystyrene) were used for the stabilization of magnetic nanoparticles (MNPs) and Ru-containing particles. The effect of support on the magnetic properties as well as the catalytic activity of the obtained systems was studied. All synthesized catalysts were shown to provide high stearic acid conversion (up to 95 %). The highest yield of C17+ hydrocarbons (up to 86 %) was observed while using the Ru–Fe3O4-HPS system. Ru–Fe3O4-HPS was characterized by the high values of the specific surface area (364 m2/g) and saturation magnetization (4.5 emu/g). The chosen catalytic system was found to maintain its catalytic activity for a minimum of 10 consecutive cycles.

FATTY acids; DEOXYGENATION; RUTHENIUM oxides; MAGNETIC traps; CATALYTIC activity; STEARIC acid; RUTHENIUM catalysts; POLYSTYRENE

Pure & Applied Chemistry, 2020, Vol 92, Issue 6, p817

0033-4545

Academic Journal

10.1515/pac-2019-1012