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- W349600770 abstract "Simultaneous hydrodesulfurization (HDS), hydrodenitrogenation (HDN), hydrogenolysis (HYC) and hydrogenation (HYG) of model compounds were studied under high pressure with MoS{sub 2}-based catalysts. Such reactions are related to conversion of coal, heavy oil and resid as well as waste materials. Three metal sulfide catalysts have been examined, including dispersed MoS{sub 2} catalyst derived in-situ from ammonium tetrathiomolybdate [ATTM, (NH{sub 4}){sub 2}MoS{sub 4}] and sulfided Co-Mo/Al{sub 2}O{sub 3} (CR-344) and Ni-Mo/Al{sub 2}O{sub 3} (CR-424) catalysts from Criterion. In order to investigate the catalytic functions of these catalysts and the influence of co-reactants, five model compounds were examined both as individual reactants and as 5-component mixture in this work, including (1) 4-(1-naphthylmethyl)bibenzyl (100%), abbreviated as NMBB, (2) pyrene (99%), (3) dibenzothiophene (98%), abbreviated as DBT, (4) quinoline (99%), and (5) eicosane (99%). The experiments with 5-component mixture showed that the patterns of product distributions strongly depend on the type of catalysts, and the trends do not always parallel with those for single-component tests, indicating the influence of co-reactants. In general, pyrene and eicosane were hardest to convert in the mixtures. The dispersed MoS{sub 2} catalyst (ATTM as precursor) showed higher capabilities on HDN and hydrogenation of pyrene, but lower HDS/conversion of DBT. Comparedmore » with the other two catalysts, CR-424 was much more active for NMBB conversion than for pyrene conversion. Overall, CR-424 catalyst appears to be the most effective on HDS, HDN and on hydrogenolysis of C-C bond in NMBB.« less" @default.
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- W349600770 date "1999-07-01" @default.
- W349600770 modified "2023-09-24" @default.
- W349600770 title "Simultaneous hydrodesulfurization, hydrodenitrogenation, hydrogenolysis and hydrogenation over MoS{sub 2}-based catalysts" @default.
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