Fast pyrolysis of microalgae Nannochloropsis Oculata for production of green diesel fraction

摘要

Nannochloropsis oculata microalgae were grown under controlled conditions. The resulting biomass was extracted with n-hexane and this lipid extract, after solvent vaporization, was pyrolyzed, either alone or in presence of niobium oxide-based catalysts. The catalysts were prepared from niobium hydrated oxide by calcination at 350°C and 700°C, the latter sample being also modified by boron. The pyrolysis, carried out in duplicates at 600°C, occurred in a micro-pyrolyzer connected to a GC-MS analytical system. The yield in oxygenated products decreased significantly, from 46% in the absence of catalyst to 11% for pyrolysis in the presence of NbB700. With the Nb350 catalyst, a small decrease in nitrogen products (nitriles and amides) from 7% in the absence of catalyst to 6%...