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Boreskov Institute of Catalysis of the Siberian Branch of Russian ...

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PP-III-10HDT330ºCHDT350ºCHDT370ºCDirectPathwayHDT330ºCHDT350ºCHDT370ºCa) VGOb)DMOCUT-I CUT-II CUT-III CUT-IVCUT-I CUT-II CUT-III CUT-IVHDT330ºCHDT350ºCHDT370ºCHDT330ºCHDT330ºCHDT350ºCHDT370ºCHDT350ºCHDT330ºCHDT370ºCHDT350ºCHDT370ºCIndirect PathwayHDT330ºCHDT350ºCHDT370ºCHDT330ºCHDT330ºCHDT350ºCHDT370ºCHDT350ºCHDT330ºCHDT370ºCHDT350ºCHDT370ºCFigure 1. Metodology for hydrotreating <strong>of</strong> VGO and DMO.In general, it was observed that sulfur, basic nitrogen, non-basic nitrogen, and totalaromatics contents increased with <strong>the</strong> boiling point <strong>of</strong> each fraction, whereas <strong>the</strong> product oilbecame more purified by <strong>the</strong> removal <strong>of</strong> undesirable contaminants with increasingtemperature <strong>of</strong> HDT. The reactivity order for hydrotreating <strong>of</strong> heavy vacuum gas oil (VGO)was established as HDS > HDA(PA) > HDA(TA) > HDNBN > HDA(DA) > HDBN =HDA(MA) following <strong>the</strong> relationship 3.0/2.0/1.8/1.6/1.5/1.0=1.0. Moreover, <strong>the</strong> reactivityorder for hydrotreating <strong>of</strong> demetalized oil (DMO) was established asHDS>HDA(PA)>HDA(TA)>HDNBN> HDA(DA)>HDBN=HDA(MA) following <strong>the</strong>relationship 5.0/2.5/1.8/1.5=1.5/1.3/1.0. Additionally different correlations for elevenmeasured physicochemical properties were explored, finding that a linear functionsatisfactorily correlated <strong>the</strong> sulfur content with nitrogen content in <strong>the</strong> feed oil and <strong>the</strong> productoil. Therefore, <strong>the</strong> nitrogen content could be used to determinate <strong>the</strong> reactivity <strong>of</strong> differentfeedstocks. Likewise was observed that <strong>the</strong> calculated composition obtained by <strong>the</strong>oreticalmixing <strong>the</strong> four hydrotreated cuts using <strong>the</strong> same mass proportions is better than compositionobtained by direct hydrotreating <strong>of</strong> complete feedstock. Therefore new schemes for HDT <strong>of</strong>heavy petroleum fractions could be proposed in order to produce fuels with higher quality.References1. Prins R. Adv. Catal. 46 (2001) 399-464.2. Korre S., Klein M., Quann R. Ind. Eng. Chem. Res.34 (1995) 101-117.3. Whitehurst D., Isoda T., Mochida I. Adv. Catal. 42 (1998) 345-471.4. Jiménez F. Estudio de los procesos simultáneos de hidrodesulfurización, hidrodesnitrogenación ehidrodesaromatización en gasóleos de vacío. Ph.D Theses. Indutrial University <strong>of</strong> Santander, Colombia,2007.5. Jiménez F., Kafarov V., Núñez M. Chem . Eng. J. 134 (2007) 200-208.322

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