Experimental and Kinetic Studies of Aromatic Hydrogenation, Hydrodesulfurization, and Hydrodenitrogenation of Light Gas Oils Derived from Athabasca Bitumen
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- 作者：Abena Owusu-Boakye ; Ajay K. Dalai ; Deena Ferdous ; and John Adjaye
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2005
- 出版时间：October 12, 2005
- 年：2005
- 卷：44
- 期：21
- 页码：7935 - 7944
- 全文大小：578K
- 年卷期：v.44,no.21(October 12, 2005)
- ISSN：1520-5045
文摘
In this work, a systematic experimental and kinetic study of hydroprocessing of light gas oils(LGOs) such as vacuum LGO (VLGO), atmospheric LGO (ALGO), and hydrotreated LGO (HLGO)using NiW/Al2O3 and commercial NiMo/Al2O3 catalysts has been conducted. Experiments wereperformed by varying temperature from 340 to 390 
C, at a constant pressure and liquid hourlyspace velocity of 11.0 MPa and 0.6 h-1, respectively. H2/feed ratio was maintained at 550 mL/mL throughout the experiments. Appreciable hydrogenation of aromatics (AHYD) was achievedby the NiW/Al2O3 catalyst at low temperatures and at high severities of hydrotreating. However,the hydrogenation activity of NiMo/Al2O3 was superior to that of the NiW/Al2O3 catalyst. Forhydrodesulfurization (HDS) and hydrodenitrogenation (HDN) activities, higher conversions of95-98.8 and 96-99 wt %, respectively, were attained for the commercial NiMo/Al2O3 catalystthroughout the temperature range studied. Simulated distillation of the feed showed that VLGOcontained the most complex and heaviest compounds followed by HLGO and ALGO. Dieselselectivity in both ALGO and HLGO increased with hydrotreating temperature, but in the caseof VLGO, it decreased with temperature. Kinetics studies showed that dearomatization of theHLGO feed was the most difficult, followed by ALGO and then the VLGO. Kinetics of ALGOand VLGO were best described by a pseudo-first-order reaction mechanism while the 1.3 powerlaw kinetics worked well with HLGO.
C, at a constant pressure and liquid hourlyspace velocity of 11.0 MPa and 0.6 h-1, respectively. H2/feed ratio was maintained at 550 mL/mL throughout the experiments. Appreciable hydrogenation of aromatics (AHYD) was achievedby the NiW/Al2O3 catalyst at low temperatures and at high severities of hydrotreating. However,the hydrogenation activity of NiMo/Al2O3 was superior to that of the NiW/Al2O3 catalyst. Forhydrodesulfurization (HDS) and hydrodenitrogenation (HDN) activities, higher conversions of95-98.8 and 96-99 wt %, respectively, were attained for the commercial NiMo/Al2O3 catalystthroughout the temperature range studied. Simulated distillation of the feed showed that VLGOcontained the most complex and heaviest compounds followed by HLGO and ALGO. Dieselselectivity in both ALGO and HLGO increased with hydrotreating temperature, but in the caseof VLGO, it decreased with temperature. Kinetics studies showed that dearomatization of theHLGO feed was the most difficult, followed by ALGO and then the VLGO. Kinetics of ALGOand VLGO were best described by a pseudo-first-order reaction mechanism while the 1.3 powerlaw kinetics worked well with HLGO.