Abstract: By analyzing the properties and solid particle size distribution of seven typical FCC slurries, it was found that the properties of slurry from different sources were quite different, the particle size of most solid particles in the slurry was less than 50μm, and the volume fraction of particles with diameter of 1-10μm was more than 50%. Three generations of flexible filter materials were used for FCC slurry desolidification experiments. The results showed that the third generation filter material had the highest desolidification rate for FCC slurry, (Al+Si) removal rate was over 97%, and the filter material regeneration performance was good. Under the condition of hydrogen partial pressure of 3.0 MPa, the desulfurization process of slurry under low pressure was studied. The results exhibited that the process has good adaptability of feedstocks and stable product quality. The blending of low sulfur heavy marine fuel oil with desulfurized and desolidified slurry as well as hydrogenated residue as components was carried out. Most of properties indexes of the blending accord with the linear law, and the mass ratio of FCC slurry in the economic blending formula is higher than 30%.

Key words: FCC slurry, residue, low sulfur heavy marine fuel