| abstract |
The invention belongs to the technical field related to biological oil production, and discloses a biofuel and a preparation method and application thereof. The method comprises the following steps: (1) magnetically separating the harvested microalgae and the magnetic Nanoparticles are separated; (2) under sub/supercritical conditions, the obtained microalgae mixture with residual magnetic nanoparticles is placed in an organic solvent for liquefaction; (3) the liquefied mixture is subjected to solid-liquid separation, and The liquid obtained from solid-liquid separation is subjected to rotary evaporation to obtain biofuel. The preparation method utilizes part of the magnetic nanoparticles that are not easily removed in the magnetic harvesting process to directly participate in the co-liquefaction reaction of the microalgae-organic solvent, catalyzes the hydrogenation of the organic solvent, and obtains a high-efficiency, low-nitrogen-containing, high-calorie-value biological product. It is easy to implement, consumes less energy, and does not require additional catalysts. |