APPLICATION OF Fe-Ni BIMETALLIC NANOEMULSION CATALYST IN SLURRY-PHASE HYDROCRACKING OF COAL TAR

Abstract

Abstract: Water in oil (W/O) type Fe-Ni bimetallic nanoemulsions were prepared as the dispersed catalysts, and their catalytic performance in the slurry-phase hydrocracking of coal tar atmospheric residue was investigated. The results demonstrated that the nanoemulsion with transparent appearance and stable kinetics was obtained at surfactant dosage of 10%. The dispersed phase was distributed uniformly in the range of 5 - 30 nm, with an average particle size of approximately 10.5 nm. The active phase of the nanoemulsion catalyst after in-situ sulfurization is mainly Fe4.5Ni4.5S8 mixed crystal, with an average particle size of 328 nm, distributed in the range of 125 - 425 nm. During the coal tar hydrocracking process, the catalytic performance of the Fe-Ni bimetallic catalyst is better than that of the Fe or Ni single metal catalysts, which is attributed to the synergistic effect of Fe-Ni bimetals. The activity of Fe-Ni bimetallic nanoemulsion catalyst is close to that of oil-soluble catalyst, realizing the advantage combination of high activity of oil-soluble catalysts and low cost of water-soluble catalysts.

Key words: coal tar, slurry-phase hydrocracking, nanoemulsion, dispersed catalyst, synergistic effect

References

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