Hydroprocessing of Maya vacuum residue using a NiMo catalyst supported on Cr-doped alumina

Purón, H.; Pinilla, J.L.; Saraev, Аndrey А.; Каичев, В. В.; Millán, Marcos

doi:10.1016/j.fuel.2019.116717

Cited by 15 publications

(6 citation statements)

References 74 publications

(93 reference statements)

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“…Fluor Corporation systematically studied the economics of the ebullated-bed hydrotreatment process, DC process, and their integration process using the linear programming model of Aspen software, respectively, and it was found that, compared with the two single processes, the integration process can remarkably increase the yield of high-value distillates. Similarly, due to the excellent performance in removing various heteroatoms, such as S, N, Ni, and V and saturating the CCR molecules with condensed aromatic rings, − the fixed-bed residue hydrotreating (RHT) technology should have great potentials to couple with DC technology to realize the highly efficient processing of heavy oils while reducing the coke yield of the DC units and simultaneously control the sulfur content in coke. Furthermore, considering the technical maturity, unit modification complexity, and investment cost, RHT-DC integration technology also shows better industrial prospects for refineries in China as compared with other technologies, ,− such as residue slurry-phase hydrocracking technology, solvent deasphalting–DC integration technology, residue catalytic cracking, and so on.…”

Section: Introductionmentioning

confidence: 99%

An Insight into the Evolution of Sulfur Species during the Integration Process of Residue Hydrotreating and Delayed Coking

Zhao

Ren

Liu

et al. 2020

Ind. Eng. Chem. Res.

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Integration technology of residue hydrotreating (RHT) and delayed coking (DC) was first proven to be an effective strategy to process high-sulfur residue oil while reducing the coke yield and simultaneously controlling the sulfur content of coke. Then, the evolution of sulfur species in the integration process was investigated by XPS, online TG-MS analysis, and atmospheric pressure photoionization FT-ICR MS. Finally, the essential effects of the RHT process on sulfur evolution were evaluated. The RHT process optimized the conversion of the refractory thiophenic sulfurs into sulfidic sulfurs as indicated by the increasing abundance of sulfidic sulfur during RHT, which thereby helped to reduce the sulfur content in coke. Moreover, RHT promoted the saturation of condensed-aromatic-ring structures of some refractory thiophenic sulfurs and thus promoted the thermal cracking of these sulfurs, and the resulting sulfurs with a smaller size thereupon directly evaporate into the liquid products, thus further reducing the sulfur content in coke.

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Section: Introductionmentioning

confidence: 99%

An Insight into the Evolution of Sulfur Species during the Integration Process of Residue Hydrotreating and Delayed Coking

Zhao

Ren

Liu

et al. 2020

Ind. Eng. Chem. Res.

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“…The binding energy of Mo3d 3/2 peaks of molybdenum in the state of Mo 0 , Mo 4+ , Mo 5+ , and Mo 6+ , according to published data is in the range of 227.6-228.0, 229.2-230.0, 230.8-231.6, and 232.3-233.0 eV, respectively [53,54]. According to literature data, the first asymmetric low-intensity doublet can be attributed to the Mo 0 state or Mo δ+ O x species (0 < δ < 4) [55] and the second doublet is related to molybdenum in Mo 6+ state.…”

Section: Catalyst Characterizationmentioning

confidence: 71%

Coupling Hydrogenation of Guaiacol with In Situ Hydrogen Production by Glycerol Aqueous Reforming over Ni/Al2O3 and Ni-X/Al2O3 (X = Cu, Mo, P) Catalysts

et al. 2020

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Biomass-derived liquids, such as bio-oil obtained by fast pyrolysis, can be a valuable source of fuels and chemicals. However, these liquids have high oxygen and water content, needing further upgrading typically involving hydrotreating using H2 at high pressure and temperature. The harsh reaction conditions and use of expensive H2 have hindered the progress of this technology and led to the search for alternative processes. In this work, hydrogenation in aqueous phase is investigated using in-situ produced hydrogen from reforming of glycerol, a low-value by-product from biodiesel production, over Ni-based catalysts. Guaiacol was selected as a bio-oil model compound and high conversion (95%) to phenol and aromatic ring hydrogenation products was obtained over Ni/γ-Al2O3 at 250 °C and 2-h reaction time. Seventy percent selectivity to cyclohexanol and cyclohexanone was achieved at this condition. Hydrogenation capacity of P and Mo modified Ni/γ-Al2O3 was inhibited because more hydrogen undergoes methanation, while Cu showed a good performance in suppressing methane formation. These results demonstrate the feasibility of coupling aqueous phase reforming of glycerol with bio-oil hydrogenation, enabling the reaction to be carried out at lower temperatures and pressures and without the need for molecular H2.

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“…As shown in Table , with increase of Ni loading, the pore volume and specific surface area of catalyst exhibit a decreasing trend, while the pore size increases, which is due to that some nickel particles enter the pore structure in Al 2 O 3 and block some of pores . In addition, the pore volume and specific surface area of the spent catalysts exhibit a decreasing trend as compared with the fresh catalysts due to the carbon deposition …”

Section: Resultsmentioning

confidence: 99%

In‐Situ Upgrading of Coal Pyrolysis Tar with Steam Catalytic Cracking over Ni/Al₂O₃ Catalysts

Cao

Wang

et al. 2020

ChemistrySelect

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In-situ upgrading of coal pyrolysis tar with steam catalytic cracking (SCC) is a promising technique to improve tar quality. In this study, Ni/Al 2 O 3 catalysts with different Ni contents were used for in-situ SCC of coal pyrolysis tar at 650°C. The results showed that Ni/Al 2 O 3 catalysts can enhance the water conversion and light tar yield. Both SCC and tar catalytic cracking can occur simultaneously over Ni/Al 2 O 3 , and the free radicals produced by tar catalytic cracking can be stabilized by active species generated from SCC to avoid excessive cracking of tar and improve light tar yield. 4Ni/Al 2 O 3 (4 wt. % Ni) exhibits the best performance, contributing to the highest water conversion of 4.74 wt. % and light tar yield of 11.90 wt. %, respectively.Correspondingly, the content of light fraction (boiling point less than 360°C) in tar sample increases from 48.0 wt. % to 67.0 wt. %, and the average molecular weight decreases from 353 amu to 253 amu over 4Ni/Al 2 O 3 . This is consistent with the increase of benzenes, phenols and naphthalenes and the decrease of long-chain aliphatic hydrocarbons, 3-and 4-ring aromatics in upgraded tar. In addition, the higher ratio of uncondensed aromatic protons to condensed aromatic protons in upgraded tar reveals the fact that 4Ni/Al 2 O 3 can promote ring-opening reaction of PAHs, which can well interpret the tar upgrading process.

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Hydroprocessing of Maya vacuum residue using a NiMo catalyst supported on Cr-doped alumina

Cited by 15 publications

References 74 publications

An Insight into the Evolution of Sulfur Species during the Integration Process of Residue Hydrotreating and Delayed Coking

An Insight into the Evolution of Sulfur Species during the Integration Process of Residue Hydrotreating and Delayed Coking

Coupling Hydrogenation of Guaiacol with In Situ Hydrogen Production by Glycerol Aqueous Reforming over Ni/Al2O3 and Ni-X/Al2O3 (X = Cu, Mo, P) Catalysts

In‐Situ Upgrading of Coal Pyrolysis Tar with Steam Catalytic Cracking over Ni/Al₂O₃ Catalysts

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Hydroprocessing of Maya vacuum residue using a NiMo catalyst supported on Cr-doped alumina

Cited by 15 publications

References 74 publications

An Insight into the Evolution of Sulfur Species during the Integration Process of Residue Hydrotreating and Delayed Coking

An Insight into the Evolution of Sulfur Species during the Integration Process of Residue Hydrotreating and Delayed Coking

Coupling Hydrogenation of Guaiacol with In Situ Hydrogen Production by Glycerol Aqueous Reforming over Ni/Al2O3 and Ni-X/Al2O3 (X = Cu, Mo, P) Catalysts

In‐Situ Upgrading of Coal Pyrolysis Tar with Steam Catalytic Cracking over Ni/Al2O3 Catalysts

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In‐Situ Upgrading of Coal Pyrolysis Tar with Steam Catalytic Cracking over Ni/Al₂O₃ Catalysts