Systematic identification and distribution analysis of olefins in FCC slurry oil

Jiao, Shouhui; Wang, Feng; Wang, Lili; Biney, Bernard Wiafe; Liu, He; Chen, Kun; Guo, Aijun; Sun, Lanyi; Wang, Zongxian

doi:10.1016/j.energy.2021.121959

Cited by 7 publications

(2 citation statements)

References 38 publications

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“…Among the olefins, the proportion of conjugated olefins could be 27%. As systematically stated by Jiao et al [10], these olefinic molecules in considerable amounts were extremely reactive in generating free radicals, which would aggravate the internal thermal reactions governing the stability of SLO and affecting the quality of the carbonaceous materials prepared. After hydrotreatment with O-MoS 2 and Mo 2 C, only 5.5% and 3.8% of olefins were left in the SLO.…”

Section: Hydrogenation Activity Evaluation In Fcc Slurry Oilmentioning

confidence: 96%

“…In the meantime, the olefins are important chemically active intermediates and products in the FCC process. Our group has identified the olefins widely distributed in SLO, and found that they could worsen the thermal stability of SLO, induce a premature coke of SLO thermal processing, and hamper the orderly development of mesophase pitch [7,10].…”

Section: Introductionmentioning

confidence: 99%

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Molybdenum Carbide and Sulfide Nanoparticles as Selective Hydrotreating Catalysts for FCC Slurry Oil to Remove Olefins and Sulfur

et al. 2021

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As the two types of major impurities in FCC slurry oil (SLO), olefins and sulfur seriously deteriorate the preparation and quality of mesophase pitch or needle coke. The development of a hydrotreatment for SLO to remove olefins and sulfur selectively becomes imperative. This work presents the potentiality of dispersed Mo2C and MoS2 nanoparticles as selective hydrotreating catalysts of SLO. Mo2C was synthesized by the carbonization of citric acid, ammonium molybdate and KCl mixtures while MoS2 was prepared from the decomposition of precursors. These catalysts were characterized by XRD, HRTEM, XPS, BJH, BET, and applied to the hydrotreating of an SLO surrogate with defined components and real SLO. The conversion of olefins, dibenzothiophene and anthracene in the surrogate was detected by GC-MS. Elemental analysis, bromine number, diene value, 1H-NMR and spot test were used to characterize the changes of the real SLO. The results show that hydrotreating the SLO surrogate with a very small amount of Mo-based nanoparticles could selectively remove olefins and sulfur without the overhydrogenation of polyaromatics. Mo2C exhibited much better activity than MoS2, with 95% of olefins and dibenzothiophene in the surrogate removed while only 15% anthracene was hydrogenated. The stability of the real SLO was significantly improved. Its structural parameters changed subtly, proving the aromatic macromolecules had been preserved.

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Section: Hydrogenation Activity Evaluation In Fcc Slurry Oilmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%