Catalytic desulfurization of residual oil through partial oxidation in supercritical water

Yuan, Pei‐Qing; Cheng, Zhenmin; Jiang, Wei-Lai; Zhang, Rui; Wang, Yuan

doi:10.1016/j.supflu.2004.11.002

Cited by 48 publications

(37 citation statements)

References 18 publications

(20 reference statements)

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“…Yuan et al [102] reported the catalytic desulfurization of BT and VR through partial SCWO in a bomb reactor at 623-723 K and 30-40 MPa over sulfided CoMo/α-Al2O3. They found that the desulfurization rate of BT and VR both had a threshold temperature (TR = 723 K), which determined the desulfurization mechanism of VR (shown in Figure 6).…”

Section: Removal Of Sulfurmentioning

confidence: 99%

A Review of Laboratory-Scale Research on Upgrading Heavy Oil in Supercritical Water

Yan

Xiao

2015

Energies

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Abstract:With the growing demand for energy and the depletion of conventional crude oil, heavy oil in huge reserve has attracted extensive attention. However, heavy oil cannot be directly refined by existing processes unless they are upgraded due to its complex composition and high concentration of heteroatoms (N, S, Ni, V, etc.). Of the variety of techniques for heavy oil upgrading, supercritical water (SCW) is gaining popularity because of its excellent ability to convert heavy oil into valued, clean light oil by the suppression of coke formation and the removal of heteroatoms. Based on the current status of this research around the world, heavy oil upgrading in SCW is summarized from three aspects: Transformation of hydrocarbons, suppression of coke, and removal of heteroatoms. In this work, the challenge and future development of the orientation of upgrading heavy oil in SCW are pointed out.

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Section: Removal Of Sulfurmentioning

confidence: 99%

A Review of Laboratory-Scale Research on Upgrading Heavy Oil in Supercritical Water

Yan

Xiao

2015

Energies

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“…Catalytic hydrodesulfurization of dibenzothiophene was examined through partial oxidation of hexylbenzene with NiMo/ Al2O3 at 673 K in SCW 5) . The residual yield of dibenzo thiophene was around 50 % and that of biphenyl and cyclohexylbenzene as hydrodesulfurized products w e r e 27 % a n d 3 % a f t e r 60 m i n , r e s p e c t ive l y. Benzothiophene was desulfurized with CoMo/Al2O3 in the presence of n-heptane, water and oxygen 27) , and quinoline was denitrogenated with NiMo/Al2O3 in the presence of n-heptane, water and oxygen 28) . Judging from these results, partial oxidation of hydrocarbons occurred to produce CO, followed by desulfurization and denitrogenation through the WGSR in SCW.…”

Section: Series Of Partial Oxidation and Hydrogenation For Upgrading mentioning

confidence: 99%

“…Real heavy oil can be desulfurized. The sulfur in VR was desulfurized with CoMo/Al2O3 in the presence of oxygen in SCW 27) . On the other hand, non-catalytic desulfurization of asphalt in SCW from 613 to 673 K with oxygen revealed that reactive sulfur-containing radicals were polymerized followed by sulfur transfer to coke 12) .…”

Section: Series Of Partial Oxidation and Hydrogenation For Upgrading mentioning

confidence: 99%

Upgrading of Heavy Oil by Hydrogenation through Partial Oxidation and Water-gas Shift Reaction in Supercritical Water

Sato

2014

J. Jpn. Petrol. Inst.

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Partial oxidation of hydrocarbons including heavy oil in supercritical water forms CO and CO2, which undergoes the water-gas shift reaction to form active hydrogen and then hydrogenation of heavy oil proceeds. In the case of partial oxidation of hydrocarbons and bitumen in supercritical water, the selectivity for partial oxidative products such as CO increased with increasing water density. In the case of hydrogenation of heavy oil in supercritical water through the water-gas shift reaction, reverse water-gas shift reaction and decomposition of formic acid that is a reaction intermediate of the water-gas shift reaction, coke formation was suppressed compared to that in only supercritical water. The main factors for suppressing coke formation were as follows: high water density improving the reactivity of hydrogen source in the oil-rich phase that enhanced hydrogenation of asphaltene core, direct injection of hydrogen source into the oil-rich phase increasing the concentration of active hydrogen in that phase, and coexisting gases with supercritical water facilitating the extraction of coke precursor from the oil-rich phase. The upgrading of heavy oil through a series of partial oxidation and hydrogenation reactions in supercritical water proceeded in the presence of catalyst and possible optimum conditions were proposed.

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“…Vacuum residuum was used to confirm the desulfurization rate and efficiency, and the desulfurization mechanism of vacuum residuum was determined by the pyrolysis temperature of the vacuum residuum. Obvious reduction of sulfides up to 67 % was obtained (Yuan et al 2005). Figure 4.36 shows the supercritical water extraction for determination of sulfur in crude oil.…”

Section: Sulfur Removal From Petroleummentioning

confidence: 99%

“…Catalytic desulfurization of residual oil has been carried out through partial oxidation in supercritical water (Yuan et al 2005). Catalytic desulfurization of a model sulfur-containing compound benzothiophene through partial oxidation in the SCW was investigated in a bomb reactor at 350-450°C and 30-40 MPa over sulfided CoMo/γ-Al 2 O 3 .…”

Section: Sulfur Removal From Petroleummentioning

confidence: 99%

Energy from Waste Materials and Unconventional Sources

Demırbas

2016

Waste Energy for Life Cycle Assessment

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Catalytic desulfurization of residual oil through partial oxidation in supercritical water

Cited by 48 publications

References 18 publications

A Review of Laboratory-Scale Research on Upgrading Heavy Oil in Supercritical Water

A Review of Laboratory-Scale Research on Upgrading Heavy Oil in Supercritical Water

Upgrading of Heavy Oil by Hydrogenation through Partial Oxidation and Water-gas Shift Reaction in Supercritical Water

Energy from Waste Materials and Unconventional Sources

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