HAL (Le Centre pour la Communication Scientifique Directe), Sep 7, 2014
This work presents a methodology to establish a Quantitative Structure Performance Relationship o... more This work presents a methodology to establish a Quantitative Structure Performance Relationship of the cobalt based catalysts for the Fischer-Tropsch Synthesis using SSITKA and micro-kinetic modeling. Special tools such as a code for computer generation of reaction network have been developed to deal with the complexity of the experimental data. The first observations allow differentiating fcc Co0 and hcp Co0 transient kinetic behavior. Further modeling work is in progress to discriminate different potential mechanisms and associated kinetic constants.
Processes like Fisher–Tropsch synthesis that yield a very large spectrum of products present chal... more Processes like Fisher–Tropsch synthesis that yield a very large spectrum of products present challenges for modeling approaches due to the large networks that are involved. The number of species involved in such a network increases exponentially if the model concerns isotopic exchange experiments due to the distribution of the labeled atom into the products. Special tools such as a code for computer to generate a reaction network have been developed to deal with the complexity of Steady-State Isotopic Kinetic Analysis (SSITKA) experiments. This approach makes it easier to model both steady-state and SSITKA experiments based on a microkinetic reaction mechanism. The methodology is applied to 12CO → 13CO SSITKA experiments for Fisher–Tropsch synthesis over a 13 wt.% Co/Al2O3 catalyst oriented towards two different Co phase structures, face-centered cubic and hexagonal close-packed, by different pre-treatments.
Guilherme De Souza , Vitaly Ordomsky, Alan Jean-Marie , Fabrice Diehl , Anne Ponchel , Éric Monfl... more Guilherme De Souza , Vitaly Ordomsky, Alan Jean-Marie , Fabrice Diehl , Anne Ponchel , Éric Monflier, Anne Griboval-Constant , N. R. Marcílio and Andrei Y. Khodakov* Unité de Catalyse et de Chimie du Solide, Universit é Lille 1-ENSCL-EC Lille, Bât. C3, Cite Scientifique, 59655 Villeneuve d’Ascq (France) Federal University of Rio Grande do Sul, 90040-040 Porto Alegre (Brazil) Energies nouvelles, Rond-point de l'échangeur de So laize, BP 3, 69360 Solaize, France Université d’Artois, F-62300 Lens (France)
A possible way to increase the amount of active phase deposited on hydrotreatment catalysts may c... more A possible way to increase the amount of active phase deposited on hydrotreatment catalysts may consist of reacting the active metal solutions directly with boehmite (AIOOH), the precursor of λ-alumina carrier. Experiments carried out on well defined systems such as boehmite sols provide a more precise insight into molybdenum/boehmite interaction. Therefore, this work gives some keys for modulating the catalytic
L'invention concerne un catalyseur d'hydrocraquage comprenant au moins une matrice amorph... more L'invention concerne un catalyseur d'hydrocraquage comprenant au moins une matrice amorphe ou mal cristallisee de type oxyde, au moins un element du groupe VB, de preference le niobium, et au moins une zeolithe choisie dans le groupe constitue par les zeolithes NU-85, NU-86 et NU-87, eventuellement au moins un element choisi parmi les elements du groupe VIS et du groupe VIII, eventuellement au moins un element choisi dans le groupe forme par P, B, Si, eventuellement au moins un element du groupe VIIA. L'invention concerne egalement l'utilisation de ce catalyseur en hydrocraquage des charges hydrocarbonees.
Describes a process for preparing a catalyst comprising at least one metal from group VIII, at le... more Describes a process for preparing a catalyst comprising at least one metal from group VIII, at least one metal from group VIB and at least one support, successively comprising: i) one of the steps selected from: i1) a step of contacting a procatalyst comprising said group VIII metal, said group VIB metal and said support with a cyclic oligosaccharide consisting of at least six glucopyranose subunits linked by α- (1,4), i2) a step contacting the support with a solution containing a precursor of said group VIII metal, a precursor of said group VIB metal and a cyclic oligosaccharide consisting of at least six glucopyranose subunits linked by α- (1,4), and i3) a first step of contacting said support with a cyclic oligosaccharide consisting of at least six glucopyranose subunits linked by α- (1,4) followed by a second step of contacting the solid from said first step with a precursor dud it Group VIII metal and a precursor of said Group VIB metal; ii) a drying step iii) a heat treatment ...
Catalyst, in which the active phase comprises at least one metal of the group VIII laid on a supp... more Catalyst, in which the active phase comprises at least one metal of the group VIII laid on a support formed by at least one oxide, is new, where the metal of the group VIII is cobalt, nickel, ruthenium or iron, and the catalyst has an atomic ratio, measured by X-ray photoelectron spectroscopy, of non-crushed cobalt and aluminum (Co/Al) particles and crushed cobalt and aluminum particles of 1-12. Independent claims are included for: (1) the preparation of (I); and (2) process of synthesizing hydrocarbon using the catalyst.
The invention relates to the use of supported catalysts comprising at least one metal or metal co... more The invention relates to the use of supported catalysts comprising at least one metal or metal compound of a metal of group VI and / or Group VIII deposited on a support essentially consisting of β silicon carbide, in a method of selective hydrodesulphurization of an olefinic hydrocarbon feed substantially free of polynuclear aromatics and metaux.L'invention allows to obtain a deep desulfurization catalytic cracking gasoline cuts with very little olefin saturation and therefore a loss of minimum octane.
L'invention concerne un procede d'isomerisation en presence d'hydrogene d'une cha... more L'invention concerne un procede d'isomerisation en presence d'hydrogene d'une charge comprenant des paraffines ayant au plus 10 atomes de carbone, et notamment des paraffines normales C7-C10 employant un catalyseur comprenant au moins une matrice oxyde amorphe, du phosphore et au moins un nitrure d'au moins un element du groupe VIB et, eventuellement au moins un element du groupe VIII de la classification periodique.
HAL (Le Centre pour la Communication Scientifique Directe), Sep 7, 2014
This work presents a methodology to establish a Quantitative Structure Performance Relationship o... more This work presents a methodology to establish a Quantitative Structure Performance Relationship of the cobalt based catalysts for the Fischer-Tropsch Synthesis using SSITKA and micro-kinetic modeling. Special tools such as a code for computer generation of reaction network have been developed to deal with the complexity of the experimental data. The first observations allow differentiating fcc Co0 and hcp Co0 transient kinetic behavior. Further modeling work is in progress to discriminate different potential mechanisms and associated kinetic constants.
Processes like Fisher–Tropsch synthesis that yield a very large spectrum of products present chal... more Processes like Fisher–Tropsch synthesis that yield a very large spectrum of products present challenges for modeling approaches due to the large networks that are involved. The number of species involved in such a network increases exponentially if the model concerns isotopic exchange experiments due to the distribution of the labeled atom into the products. Special tools such as a code for computer to generate a reaction network have been developed to deal with the complexity of Steady-State Isotopic Kinetic Analysis (SSITKA) experiments. This approach makes it easier to model both steady-state and SSITKA experiments based on a microkinetic reaction mechanism. The methodology is applied to 12CO → 13CO SSITKA experiments for Fisher–Tropsch synthesis over a 13 wt.% Co/Al2O3 catalyst oriented towards two different Co phase structures, face-centered cubic and hexagonal close-packed, by different pre-treatments.
Guilherme De Souza , Vitaly Ordomsky, Alan Jean-Marie , Fabrice Diehl , Anne Ponchel , Éric Monfl... more Guilherme De Souza , Vitaly Ordomsky, Alan Jean-Marie , Fabrice Diehl , Anne Ponchel , Éric Monflier, Anne Griboval-Constant , N. R. Marcílio and Andrei Y. Khodakov* Unité de Catalyse et de Chimie du Solide, Universit é Lille 1-ENSCL-EC Lille, Bât. C3, Cite Scientifique, 59655 Villeneuve d’Ascq (France) Federal University of Rio Grande do Sul, 90040-040 Porto Alegre (Brazil) Energies nouvelles, Rond-point de l'échangeur de So laize, BP 3, 69360 Solaize, France Université d’Artois, F-62300 Lens (France)
A possible way to increase the amount of active phase deposited on hydrotreatment catalysts may c... more A possible way to increase the amount of active phase deposited on hydrotreatment catalysts may consist of reacting the active metal solutions directly with boehmite (AIOOH), the precursor of λ-alumina carrier. Experiments carried out on well defined systems such as boehmite sols provide a more precise insight into molybdenum/boehmite interaction. Therefore, this work gives some keys for modulating the catalytic
L'invention concerne un catalyseur d'hydrocraquage comprenant au moins une matrice amorph... more L'invention concerne un catalyseur d'hydrocraquage comprenant au moins une matrice amorphe ou mal cristallisee de type oxyde, au moins un element du groupe VB, de preference le niobium, et au moins une zeolithe choisie dans le groupe constitue par les zeolithes NU-85, NU-86 et NU-87, eventuellement au moins un element choisi parmi les elements du groupe VIS et du groupe VIII, eventuellement au moins un element choisi dans le groupe forme par P, B, Si, eventuellement au moins un element du groupe VIIA. L'invention concerne egalement l'utilisation de ce catalyseur en hydrocraquage des charges hydrocarbonees.
Describes a process for preparing a catalyst comprising at least one metal from group VIII, at le... more Describes a process for preparing a catalyst comprising at least one metal from group VIII, at least one metal from group VIB and at least one support, successively comprising: i) one of the steps selected from: i1) a step of contacting a procatalyst comprising said group VIII metal, said group VIB metal and said support with a cyclic oligosaccharide consisting of at least six glucopyranose subunits linked by α- (1,4), i2) a step contacting the support with a solution containing a precursor of said group VIII metal, a precursor of said group VIB metal and a cyclic oligosaccharide consisting of at least six glucopyranose subunits linked by α- (1,4), and i3) a first step of contacting said support with a cyclic oligosaccharide consisting of at least six glucopyranose subunits linked by α- (1,4) followed by a second step of contacting the solid from said first step with a precursor dud it Group VIII metal and a precursor of said Group VIB metal; ii) a drying step iii) a heat treatment ...
Catalyst, in which the active phase comprises at least one metal of the group VIII laid on a supp... more Catalyst, in which the active phase comprises at least one metal of the group VIII laid on a support formed by at least one oxide, is new, where the metal of the group VIII is cobalt, nickel, ruthenium or iron, and the catalyst has an atomic ratio, measured by X-ray photoelectron spectroscopy, of non-crushed cobalt and aluminum (Co/Al) particles and crushed cobalt and aluminum particles of 1-12. Independent claims are included for: (1) the preparation of (I); and (2) process of synthesizing hydrocarbon using the catalyst.
The invention relates to the use of supported catalysts comprising at least one metal or metal co... more The invention relates to the use of supported catalysts comprising at least one metal or metal compound of a metal of group VI and / or Group VIII deposited on a support essentially consisting of β silicon carbide, in a method of selective hydrodesulphurization of an olefinic hydrocarbon feed substantially free of polynuclear aromatics and metaux.L'invention allows to obtain a deep desulfurization catalytic cracking gasoline cuts with very little olefin saturation and therefore a loss of minimum octane.
L'invention concerne un procede d'isomerisation en presence d'hydrogene d'une cha... more L'invention concerne un procede d'isomerisation en presence d'hydrogene d'une charge comprenant des paraffines ayant au plus 10 atomes de carbone, et notamment des paraffines normales C7-C10 employant un catalyseur comprenant au moins une matrice oxyde amorphe, du phosphore et au moins un nitrure d'au moins un element du groupe VIB et, eventuellement au moins un element du groupe VIII de la classification periodique.
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