Novel magnetic molybdenum disulfide catalyst and its application in hydrocracking reaction

A magnetic molybdenum disulfide (Fe-Fe2O3@PDA@MoS2) was prepared and evaluated as a dispersive viscosity reducing catalyst for the heavy oil. The catalysts were analyzed using a variety of characterization methods, and the effects of preparation method and oleic acid treatment on performance were also compared. The particle size of Fe-Fe2O3 magnetic nanochains was about 80 nm, the saturation magnetization strength was 110 emu/g, and the components in the nanochains were mainly iron elements. The catalyst further prepared by liquid phase precipitation had unique flower-like structure and good viscosity reduction ability. The loading amount of MoS2 was 16.7 wt% and the saturation magnetization was 36.3 emu/g, while the saturation magnetization of the oleic acid treated sample was 28.9 emu/g. The as-prepared Fe-Fe2O3@PDA@MoS2 can reach more than viscosity reduction 99% under 10 MPa hydrogen pressure and 400 similar to 415 degrees C. In addition, the component analyses of four groups (saturate, aromatic, resin, and asphaltenes) for the liquid products in the heavy oil were conducted to analysis the mechanism of viscosity reduction of catalyst.