Effect of nitrogen compounds in the hydrodesulfurization of straight-run gas oil using a CoMoP/g-Al2O3 catalyst

García-Gutiérrez, José Luis; Laredo, Georgina C.; Fuentes, Gustavo A.; García-Gutiérrez, Ponciano; Jiménez-Cruz, Federico

doi:10.1016/j.fuel.2014.08.008

Cited by 30 publications

(14 citation statements)

References 60 publications

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“…3). By pretreating SRGO using MIL-101(Cr) prepared through different protocols (no PO addition) to that used in this work,~13 wt% total S removal was observed [72] at conditions at which 94 wt% N was retained by the adsorbent. Adsorption of sterically hindered S-species on MIL-101(Cr) [31] could contribute to ULSD production as they constitute the most resilient last parts per million of sulfur compounds to be eliminated.…”

Section: Nitrogen Compounds Removalmentioning

confidence: 92%

Nitrogen compounds removal from oil-derived middle distillates by MIL-101(Cr) and its impact on ULSD production by hydrotreating

Meneses-Ruiz

Escobar

Mora

et al. 2021

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Oil-derived middle distillates (straight-run gas oil and mixture with light cycle oil and coker gas oil) for Ultra-Low Sulfur Diesel (ULSD) production by HyDroTreating (HDT) were pretreated by selective Nitrogen Organic Compounds (NOC) adsorption. Highly crystalline Metal-Organic Framework (MOF) MIL-101(Cr) prepared with propylene oxide (proton scavenger) as textural improver was used to that end. MOF was characterized by N2 physisorption, X-ray diffraction, thermal analysis, infrared, Raman and UV-vis spectroscopies, and electron microscopy (SEM and HR-TEM). NOC removal was carried out at room temperature and atmospheric pressure, the adsorbent being easily regenerable under mild conditions. Extruded MOF efficiently removed NOC from real feedstocks to concentrations ~ 80 ppm which allowed ULSD production at much milder conditions to those used during pristine feedstocks HDT. Operating temperature could be significantly diminished (from 350 to 330 °C, at 56 kg cm−2 (5.77 MPa), LHSV = 1.5 h−1, H2/oil = 2500 ft3 bbl−1 (445 m3 m−3)) which could notably prolong cycle life of NiMo/Al2O3 formulation used.

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Section: Nitrogen Compounds Removalmentioning

confidence: 92%

Nitrogen compounds removal from oil-derived middle distillates by MIL-101(Cr) and its impact on ULSD production by hydrotreating

Meneses-Ruiz

Escobar

Mora

et al. 2021

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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“…Desulfurization and denitrogenation of fuels are performed industrially by hydrotreating processes, which require harsh conditions (> 350°C, 20-130 atm H 2 ) to efficiently remove the heterocyclic sulfur or nitrogen compounds, such as benzothiophenes, dibenzothiophenes, thiophenes, quinolines, indoles, carbazoles, acridines, and pyridines [4,11]. The presence of nitrogen compounds even in low concentrations of < 100 ppm brings other problems since they are strong inhibitors of hydrodesulfurization (HDS) reactions, instigating a catalytic deactivation due to their competition with sulfur compounds for the active sites of the hydrotreating catalysts [11][12][13][14]. To avoid all the drawbacks associated with the presence of SCCs and NCCs in liquid fuels, it is necessary to develop alternative desulfurization and denitrogenation technologies that could complement or substitute the HDS and hydrodenitrogenation (HDN) processes for the realization of ultra-low sulfur and nitrogen levels.…”

Section: Introductionmentioning

confidence: 99%

Desulfurization and Denitrogenation Processes to Treat Diesel Using Mo(VI)‐Bipyridine Catalysts

et al. 2020

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High efficiency was found for desulfurization and denitrogenation processes to treat diesel using either the hybrid material {[MoO3(2,2′‐bipy)][MoO3(H2O)]}n or the octanuclear complex [Mo8O22(OH)4(di‐tBu‐bipy)4] (2,2′‐bipy = 2,2′‐bipyridine, di‐tBu‐bipy = 4,4′‐di‐tert‐butyl‐2,2′‐bipyridine) as catalysts. These processes were employed in a single procedure to simultaneously remove sulfur (dibenzothiophene, 4‐methyldibenzothiophene, and 4,6‐dimethyldibenzothiophene) and nitrogen (indole and quinoline) compounds from diesel. A reaction time of two hours was sufficient to achieve at least 99.9 % S removal and 97 % N removal. Furthermore, the catalytic systems presented a high capacity to be reused/recycled for consecutive desulfurization/denitrogenation cycles.

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“…It is well known that the nitrogen compounds in diesel oil can be sorted into nonbasic nitrogen compounds (such as pyrroles, indoles, and carbazoles) and basic nitrogen compounds (such as anilines, pyridines, and quinolines) (Cheng et al., 2011; Laredo et al., 2002) which are the major harmful nitrogen compounds (Glaucia et al., 2017). The latter basic nitrogen compounds can also seriously affect deep removal of sulfur compounds by using hydrodesulfurization (García-Gutiérrez et al., 2014; Polo, 2015). Main techniques for the denitrogenation of diesel oil include hydrogenation refining which needs strict operation conditions and huge instrument investment and nonhydrogenation refining such as liquid–liquid phase partitioning, nitrogen removal methods by solid adsorbents, and so on.…”

Section: Introductionmentioning

confidence: 99%

Adsorption removing various basic nitrogen compounds from model diesel over allochroic silica gel

Hong

Gao

et al. 2018

Adsorption Science & Technology

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The adsorption removal of quinoline from model diesel by using alumina, diatomite, silica gel, and allochroic silica gel as adsorbents was investigated. The experiment results indicated that the adsorption denitrogenation performance of allochroic silica gel was more superior to other three adsorbents. The silica gel and allochroic silica gel were confirmed by characterization with X-ray diffraction, nitrogen adsorption-desorption, and ammonia temperature programmed desoption (NH 3-TPD). X-ray diffraction results indicated that both the samples were amorphous structures. The average pore diameters of silica gel and allochroic silica gel were 18.46 and 1.80 nm, the Brunauer-Emmett-Teller surface areas were 437.86 and 623.39 m 2 /g, and the pore volumes were 0.9724 and 0.3442 cm 3 /g, respectively. The results of TPD showed that the acidity of allochroic silica gel was far stronger than that of silica gel which greatly enhanced its adsorption denitrogenation performance. The adsorption denitrogenation performance of allochroic silica gel for quinoline, aniline, and pyridine from model diesel was as follows: aniline, pyridine, and quinoline. Adsorption temperature, particle size, and arenes added in model diesel had little impact on the removal of aniline and pyridine except quinoline. The adsorbent-to-oil ratio had significant effects on adsorption denitrogenation, especially for quinoline. The N-Co bond between Co in allochroic silica gel and N atom in the basic nitrogen compounds molecule played a significant role. Furthermore, the allochroic silica gel could be easily regenerated by its adsorption denitrogenation performance for quinoline and pyridine by using calcination once or several times, except aniline. The adsorption isotherm results revealed that the adsorption of pyridine and aniline belonged to the Langmuir-Freundlich binding model, but the adsorption of quinoline belonged to Freundlich model.

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Effect of nitrogen compounds in the hydrodesulfurization of straight-run gas oil using a CoMoP/g-Al2O3 catalyst

Cited by 30 publications

References 60 publications

Nitrogen compounds removal from oil-derived middle distillates by MIL-101(Cr) and its impact on ULSD production by hydrotreating

Nitrogen compounds removal from oil-derived middle distillates by MIL-101(Cr) and its impact on ULSD production by hydrotreating

Desulfurization and Denitrogenation Processes to Treat Diesel Using Mo(VI)‐Bipyridine Catalysts

Adsorption removing various basic nitrogen compounds from model diesel over allochroic silica gel

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