Study of the selectivity in FCC naphtha hydrotreating by modifying the acid–base balance of CoMo/γ-Al2O3 catalysts

Pérez-Martínez, David J.; Eloy, Pierre; Gaigneaux, Éric M.; Giraldo, Sonia A.; Centeno, Aristóbulo

doi:10.1016/j.apcata.2010.09.028

Cited by 31 publications

(12 citation statements)

References 46 publications

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“…8, where a detrimental effect of increasing the sodium content in the support on the activity and hydrogenation ability of the NiMo/TNT(x) catalysts can be seen. In general, these results are in line with previous publications [48,[57][58][59][60], where the effect of the introduction of alkaline metals (Na + , K + ) on the catalytic behavior of different HDS catalysts (CoMo/Al 2 O 3 , NiW/MCM-41, CoMo/aluminosilicate) was studied. To clarify the effect of sodium addition on the behavior of the titania-supported NiMo catalysts, in the present work, commercial TiO 2 anatase (TiO 2 -NP) was used, which was modified with different amounts of Na (TiO 2 -NP(y) supports).…”

supporting

confidence: 90%

“…Although in the XRD results (Fig. 4) the formation of these compounds was not observed, probably because of the small size of the crystallites, it was suspected that aggregates of these compounds dispersed on the support surface could be present in the catalysts supported on TNT(x) materials with high sodium content, which is in line with previous literature reports [32,58,59,61,62]. The formation of Na 2 MoO 4 and Na 2 Mo 2 O 7 compounds in Na-doped catalysts was considered to be responsible for the detrimental effect of sodium because they are difficult to sulfide and lead to a less active sulfide phase in HDS reactions [59].…”

supporting

confidence: 85%

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Influence of Na content on behavior of NiMo catalysts supported on titania nanotubes in hydrodesulfurization

Ortega-Domínguez

Mendoza-Nieto

Hernández-Hipólito

et al. 2015

Journal of Catalysis

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supporting

confidence: 90%

supporting

confidence: 85%

Influence of Na content on behavior of NiMo catalysts supported on titania nanotubes in hydrodesulfurization

Ortega-Domínguez

Mendoza-Nieto

Hernández-Hipólito

et al. 2015

Journal of Catalysis

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“…h and H 2 to liquid feed ratio of 500. In previous experiments Pérez- Martínez et al (2010) the absence of any diffusion limitations has been demonstrated, under the mentioned conditions and applying the experiments suggested by Le Page (1987). Liquid samples were taken every hour for about 7 h of reaction, and these were analysed on a HP 6890 gas chromatograph with a FID detector and a column HP-1 (100 m × 0.25 mm -conversion.…”

Section: Catalyst Preparationmentioning

confidence: 99%

“…According to the HDS pathway of 2MT proposed by Pérez-Martínez et al (2010), the 1-pentene, 2-pentene and n-pentene (C5 s ) were considered desulfurized products. Although in the HDT of TMP, isomerization and cracking reactions occur at certain extent in order to simplify the kinetic model they were neglected and the direct HYD of TMP reaction producing isooctane was the only one considered as an assumption for the kinetic model.…”

Section: Mathematical Modelingmentioning

confidence: 99%

“…Hydrotreating (HDT) is widely used to remove heteroatoms (S, N and O) and aromatics contained in petroleum fractions catalysts is the keystone to selectively remove those pollutants (Brunet et al, 2005;Ratnasamy & Sivasanker, 1980;Morterra & Magnacca, 1996;Pérez-Martínez et al, 2010). Special attention should be placed on the hydrodesulfurization (HDS) of naphtha coming from the Fluid Catalytic Cracking (FCC) unit, which constitutes about 30% of the gasoline and accounts for 80 to 90% of the total sulphur content (Song, 2003;Kaufmann et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

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Kinetic parameters determination of FCC gasoline hydrotreating using genetic algorithms

Celis-Cornejo

Granados-Zarta

Bravo-Villarreal

et al. 2013

CT&F Cienc. Tecnol. Futuro

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The kinetics parameters for the simultaneous reactions of hydrodesulfurization and hydrogenation of synthetic Fluid Catalytic Cracking (FCC) naphtha over CoMo/ -Al2O3 catalyst were determined. The proposed kinetic model considered a Langmuir-Hinshelwood adsorption mechanism (with 16 steps) with just one kind of active site. The amount of experimental data obtained was relatively limited, thus a genetic algorithm accompanied by an optimization through the Nelder-Mead Simplex method were used for the parameter estimations. Trimethylpentenes and 2-methylthiophene were used as representative molecules of unsaturated and sulfur compounds in FCC naphtha respectively. It was possible to calculate kinetic and thermochemical parameters, such as activation energies, adsorption heats and frequency factors with a good enough approach. This methodology results very useful since it allows the parameters determination with accuracy, reducing the amount of experimentation in comparison with traditional methodologies. . O modelo cinético proposto considerou um mecanismo de adsorção de Langmuir-Hinshelwood (com 16 passos) com um único tipo de lugar ativo. A quantidade de dados experimentais foi relativamente baixa, portanto, para a estimativa de parâmetros foram utilizados algoritmos genéticos em conjunto com o método de minimização de NelderMead Simplex. Trimetil-pentenos e 2-metil-tiofeno foram usados como moléculas representativas de compostos insaturados e sulfurados de uma nafta de FCC, respectivamente. Foi possível calcular com uma boa aproximação parâmetros termoquímicos e cinéticos, tais como, energias de ativação, calores de adsorção e fatores de frequência. Esta metodologia resulta muito útil já que permite a determinação de parâmetros com boa aproximação reduzindo a quantidade de experimentação, em comparação com as metodologias tradicionais. ABSTRACT DETERMINACIÓN DE PARÁMETROS CINÉTICOS DEL HIDROTRATAMIENTO DE UNA NAFTA DE FCC USANDO ALGORITMOS GENÉTICOS Se determinaron los parámetros cinéticos para las reacciones simultáneas de hidrodesulfuración e hidrogenación de una carga representativa de una nafta de Craqueo Catalítico Fluidizado (FCC, de sus siglas en inglés) sobre un catalizador CoMo/ -Al 2 O 3 . El modelo cinético propuesto consideró un mecanismo de adsorción de Langmuir-Hinshelwood (con 16 pasos) con un único tipo de sitio activo. La cantidad de datos experimentales fue relativamente baja, por lo tanto para la estimación de parámetros se utilizaron algoritmos genéticos en conjunto con el método de minimización de Nelder-Mead Simplex. Trimetilpentenos y 2-metiltiofeno fueron usados como moléculas representativas de compuestos insaturados y sulfurados de una nafta de FCC, respectivamente. Fue posible calcular con una buena aproximación parámetros termoquímicos y cinéticos, tales como, energías de activación, calores de adsorción y factores de frecuencia. Esta metodología resulta muy útil ya que permite la determinación de parámetros con buena aproximación reduciendo la cantidad de experimentación, en compara...

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Catalytic dehydration of ethanol to ethylene and diethyl ether over alumina catalysts containing different phases with boron modification

et al. 2018

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Study of the selectivity in FCC naphtha hydrotreating by modifying the acid–base balance of CoMo/γ-Al2O3 catalysts

Cited by 31 publications

References 46 publications

Influence of Na content on behavior of NiMo catalysts supported on titania nanotubes in hydrodesulfurization

Influence of Na content on behavior of NiMo catalysts supported on titania nanotubes in hydrodesulfurization

Kinetic parameters determination of FCC gasoline hydrotreating using genetic algorithms

Catalytic dehydration of ethanol to ethylene and diethyl ether over alumina catalysts containing different phases with boron modification

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