WO2010072976A1 - Zeolites y modifiees a structure intracristalline trimodale, leur procede de fabrication et leur utilisation - Google Patents
Zeolites y modifiees a structure intracristalline trimodale, leur procede de fabrication et leur utilisation Download PDFInfo
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- WO2010072976A1 WO2010072976A1 PCT/FR2009/052668 FR2009052668W WO2010072976A1 WO 2010072976 A1 WO2010072976 A1 WO 2010072976A1 FR 2009052668 W FR2009052668 W FR 2009052668W WO 2010072976 A1 WO2010072976 A1 WO 2010072976A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/08—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
- B01J29/084—Y-type faujasite
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/08—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
- B01J29/10—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y containing iron group metals, noble metals or copper
- B01J29/12—Noble metals
- B01J29/126—Y-type faujasite
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B39/00—Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
- C01B39/026—After-treatment
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B39/00—Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
- C01B39/20—Faujasite type, e.g. type X or Y
- C01B39/24—Type Y
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G47/00—Cracking of hydrocarbon oils, in the presence of hydrogen or hydrogen- generating compounds, to obtain lower boiling fractions
- C10G47/02—Cracking of hydrocarbon oils, in the presence of hydrogen or hydrogen- generating compounds, to obtain lower boiling fractions characterised by the catalyst used
- C10G47/10—Cracking of hydrocarbon oils, in the presence of hydrogen or hydrogen- generating compounds, to obtain lower boiling fractions characterised by the catalyst used with catalysts deposited on a carrier
- C10G47/12—Inorganic carriers
- C10G47/16—Crystalline alumino-silicate carriers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/10—After treatment, characterised by the effect to be obtained
- B01J2229/16—After treatment, characterised by the effect to be obtained to increase the Si/Al ratio; Dealumination
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/10—After treatment, characterised by the effect to be obtained
- B01J2229/18—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/10—After treatment, characterised by the effect to be obtained
- B01J2229/20—After treatment, characterised by the effect to be obtained to introduce other elements in the catalyst composition comprising the molecular sieve, but not specially in or on the molecular sieve itself
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/10—After treatment, characterised by the effect to be obtained
- B01J2229/22—After treatment, characterised by the effect to be obtained to destroy the molecular sieve structure or part thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/30—After treatment, characterised by the means used
- B01J2229/38—Base treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/30—After treatment, characterised by the means used
- B01J2229/40—Special temperature treatment, i.e. other than just for template removal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/30—After treatment, characterised by the means used
- B01J2229/42—Addition of matrix or binder particles
Definitions
- the invention relates to the field of catalysts, in particular zeolites Y with a faujasite structure.
- the different zeolites are distinguished by different structures and properties. Some structures commonly used in the field of catalysis are described below.
- Zeolite Y is a three-dimensional zeolite with large pores, the structure of which has large cavities interconnected by channels of 12-membered rings (there are 12 cations (Si4 + and A13 +) and 12 O2-anions present in the cycle).
- Zeolite beta is a large-pore, three-dimensional zeolite with pores made of 12-element rings in all directions.
- ZMS-5 zeolite is a nearly three-dimensional pore-sized zeolite with pores consisting of 10-membered rings in one direction that are interconnected by zigzag-shaped channels of 10-membered rings. this is why this structure is considered as three-dimensional).
- Mordenite is a large-pore zeolite made up of 12-membered rings, with channels extending in a single direction, and between these channels small pockets of 8-membered rings.
- Ferrierite is a medium-sized, pore-sized zeolite with main channels of 10-element rings, which are interconnected via side channels of 8-membered rings.
- Zeolites are important catalytic materials and widely used in acid catalytic reactions such as cracking, including hydrocracking, FCC and olefin cracking, isomerization reactions, especially paraffins and olefins, and also in methanol conversion technologies, for example MTO, MTP and MTG.
- zeolites, and in particular their microporous structures are often crucial for obtaining good catalytic activity, good stability and / or good selectivity.
- the microporous structures may also have disadvantages, for example the low access of molecules in zeolite crystals, undesired adsorption of reagents and / or products during catalysis. These steric constraints reduce the accessibility of the microporous volume of the zeolite during the reaction, which may lead in some cases to little or no effective use.
- one of the important elements is the obtaining of zeolites having sufficient accessibility to the reagents and / or products, in order to improve the efficiency of the catalyst.
- Another strategy is to create a secondary pore system, consisting of mesopores (2-50 nm), in the microporous crystals of zeolites.
- mesopores are introduced into crystals of zeolites or quasi-zeolites by dealumination, for example using a hydro-thermal treatment, acid leaching techniques, or chemical treatments based on EDTA or (NH 4 ) SiF. 6 .
- the invention aims to solve all or part of the problems mentioned above.
- the subject of the invention is a Y zeolite with a modified faujasite structure whose intracrystalline structure has at least one micropore network, at least one network of small mesopores with a mean diameter of 2 to 5 nm and at least one network. large mesopores with a mean diameter of 10 to 50 nm, these different networks being interconnected.
- the modified Y zeolite of the present invention thus has a trimodal intracrystalline porosity, i.e., three pore arrays of different average diameters within each crystal.
- zeolites Y generally have micropores with a mean diameter of between 0.7 and 1.4 nm.
- the modified zeolite Y according to the invention will advantageously have a ratio Vs / Vl of the volume (Vs) of the small mesopores ("small mesopores" in English) on the volume (Vl) of the large mesopores ("large mesopores” in English). ), greater than or equal to 1, in particular greater than or equal to 1, 20, even greater than or equal to 1, 60, very particularly greater than or equal to 1.80, still more particularly greater than or equal to 2.
- the zeolite according to the invention may have a sodium (Na) content of less than or equal to 100 ppm, in particular less than or equal to 50 ppm.
- the zeolite may have an Si / Al atomic ratio less than or equal to 25, in particular less than or equal to 24, even less than or equal to 23, more particularly less than or equal to 22, even more particularly less than or equal to 21, possibly lower or equal to 20.5.
- the Si / Al ratio may also be less than or equal to 40, in particular less than or equal to 35, even less than or equal to 30, more particularly less than or equal to 28, and even more particularly less than or equal to 25.
- the Si / Al atomic ratio may be greater than or equal to 6, in particular greater than or equal to 8, even greater than or equal to 10, more particularly greater than or equal to 1 1, even more particularly greater than or equal to 12.
- the Si / Al ratio Ai may also be greater than or equal to 15, in particular greater than or equal to 17, even greater than or equal to 18, more particularly greater than or equal to 19, still more particularly greater than or equal to 20.
- the modified Y zeolite may have a mesoporous volume greater than or equal to 0.20 ml / g, in particular greater than or equal to 0.25 ml / g, in particular greater than or equal to 0.35 ml / g, or even greater than or equal to 0.40 ml / g.
- mesoporous volume is meant the volume of mesopores with a mean diameter of between 2 and 50 nm, which represents in this case the sum of the volumes of small and large mesopores.
- the zeolite according to the invention may have a small mesopore volume (Vs) greater than or equal to 0.1 ml / g, in particular greater than or equal to 0.15 ml / g, in particular greater than or equal to 0, 20 ml / g, or even greater than or equal to 0.25 ml / g.
- Vs small mesopore volume
- the modified Y zeolite may also have a microporous volume less than or equal to 0.20 ml / g, in particular less than or equal to 0.18 ml / g, in particular less than or equal to 0.16 ml / g, or even less than or equal to at 0, 125 ml / g, more preferably less than or equal to 0, 10 ml / g.
- the mesoporous volume / microporous volume ratio may be greater than or equal to 1, in particular greater than or equal to 1, 5, in particular greater than or equal to 3, even greater than or equal to 3.5, most preferably greater than or equal to 4, more particularly greater than or equal to 4.5, or even greater than or equal to 5.
- the modified Y zeolite may have an external surface S ex t greater than or equal to 200 m 2 / g, in particular greater than or equal to 250 m 2 / g, in particular greater than or equal to 300 m 2 / g, or even greater than or equal to 350 m 2 / g and most preferably greater than or equal to 400 m 2 / g.
- the density of acid sites may be less than or equal to 0.25 mmol / g, in particular less than or equal to 0.23 mmol / g, in particular less than or equal to 0.22 mmol / g, or even lower. or equal to 0.21 mmol / g.
- a Y zeolite modified according to the invention, or a composite material comprising zeolite Y modified according to the invention, especially at least 20% by weight relative to the total weight of the composite material may be prepared by the following steps: ) suspending a zeolite Y or a composite material comprising it, especially at a content of at least 20% by weight relative to the total weight of the material, with a basic aqueous solution comprising at least one strong base, in particular NaOH or KOH, and / or low, in particular sodium carbonate, sodium citrate, etc., for example at a concentration ranging from 0.001 to 0.5 M, at room temperature, with magnetic or mechanical stirring, b) filtering the zeolite Y obtained and wash it with a solvent, in particular a polar solvent, for example pure distilled water, c) optionally drying the washed zeolite, d) contacting, with stirring, the washed and optionally dried zeolite.
- the process may make it possible to obtain modified Y zeolites having an Si / Al atomic ratio greater than or equal to 5, less than or equal to 40 and / or a mesoporous volume greater than or equal to 0.22 ml / g.
- this process can make it possible to obtain zeolites Y having, with respect to the starting zeolite:
- the weight ratio aqueous solution / zeolite, especially Y zeolite may range from 20 to 100, especially from 30 to 80, in particular from 40 to 60, or even be about 50.
- the base concentration of the solution of step a) may range from 0.001 to 0.5 M, in particular from 0.005 to 0.2, in particular from 0.01 to 0.1, or even be about 0.05. Mr.
- the NH 4 NO 3 / zeolite Y solution weight ratio can range from 5 to 75, in particular from 10 to 50, in particular from 20 to
- the concentration of NH 4 NO 3 in the solution of step d) may range from 0.01 to 0.5 M, in particular from 0.05 to 0.4, in particular from 0.1 to 0.3, or even from about 0.2 M.
- the starting material is a Y zeolite, which has undergone at least one dealumination treatment, in particular partial, for example acid and / or steam treatments.
- dealumination treatment in particular partial, for example acid and / or steam treatments.
- These treatments may allow (i) to reduce the acidity of the material, (ii) to increase, if only slightly, the mesoporosity of the initial material, which is essentially purely microporous.
- these treatments correspond to those described in US Pat. No. 5,601,798, the contents of which are incorporated by reference.
- the method may further comprise a step of neutralizing the solution before the first filtration. This can help stop the desilication. This desilication can have for result of creating mesoporosity, including too much mesoporosity. At this stage, this creation of mesoporosity can be a problem, in particular if it is too important, by causing a loss of the zeolite crystal structure, for example a loss of microporosity, which can induce a decrease in the activity. intrinsic material.
- This neutralization step can be carried out by washing with water or with any type of acid, for example sulfuric acid, in particular under industrial conditions on large quantities of product.
- any type of acid for example sulfuric acid
- the contacting steps (suspension) in a basic solution and / or in the NH 4 NO 3 solution take place at room temperature and in particular do not require heating.
- ambient temperature is intended to mean a temperature ranging from 18 to 25 ° C., and in particular a temperature of 20 ° C.
- step a) the contacting with a basic solution may last from 5 to 120 min, in particular from 10 to 60 min, in particular from 15 to 30 min.
- the suspension may be stirred, in particular by magnetic or mechanical stirring.
- the drying step may be carried out at a temperature greater than or equal to 70 ° C., in particular greater than or equal to 75 ° C., or even greater than or equal to 80 ° C. It may range from one to 36 hours, in particular from 3 to 24 hours and in particular from 8 to 15 hours.
- the drying step may last until the weight of the zeolite no longer varies, especially when the difference between the weight of the zeolite at a time t and the weight of this zeolite after two hours of heating varies less of 0, 1% by weight relative to the weight of the zeolite.
- the drying can be carried out under air or in an inert atmosphere.
- Step d) of contacting with the NH 4 NO 3 solution may last from 2 to 24 hours, in particular from 3 to 12 hours, in particular from 4 to 8 hours, or even approximately four hours.
- the f) calcination step may be carried out at a temperature greater than or equal to 400 ° C., in particular greater than or equal to 450 ° C., or even greater than or equal to 500 ° C.
- the heating may last from 2 to 8 hours, in particularly from 3 to 6 hours, or even 5 to 7 hours.
- the heating may comprise a rise in temperature of 0.5 to 2 ° C./min, in particular of 1 ° C./min.
- the heating can be carried out under air or under an inert atmosphere.
- the process described above can make it possible to obtain a zeolite Y having a microporous volume of less than 30%, in particular
- Y zeolite having a mesoporous volume greater than 30%, especially 35%, in particular 40%, or even 45%, at the mesoporous volume of the zeolite
- the invention also relates to a zeolite Y obtainable by the method described above.
- the invention optionally relates to the restoration ("healing") of the crystalline defects created by the alkaline treatment, defects which lead to a decrease in the density of the acid sites measured by desorption of NH3.
- This restoration can be carried out by gentle steam treatment (see van Donk et al., Generation, Characterization, and Impact of Mesopores in Zeolite Catalysts, Catalysis Reviews, 2003. 45 (2): 297-319) leading to acidity values measured by TPD of NH3 greater than 0.25 mmol / g.
- the subject of the invention is particles, in particular catalytic particles, including the modified Y zeolite according to the invention and at least one binding agent, such as silica or alumina. These particles may further comprise a catalytic metal.
- These particles can be prepared by mixing modified zeolite Y and at least one binding agent, such as silica or alumina, according to the alkaline treatment method described above.
- the process for preparing these particles may further comprise a step of fixing, for example by adsorption, of catalytic metal.
- a macroscopic shaping of the catalyst that is to say the shaping of the modified material with a binder of silica or alumina type.
- This may for example allow direct use of the material in typical industrial reactors, for example fixed bed reactors.
- This shaping can be carried out by extrusion but also allow a macro-s ec ric eff ective macro or other macroscopic fo rmes that can be adapted to use in fixed or mobile bed reactors.
- the alkaline treatment process may be applied to a composition comprising at least one modified Y zeolite (following a dealumination process) and a binding agent, in particular in the form of particles ready for use in a fixed bed reactor. or mobile, especially in extruded form, or in the form of beads.
- composite material zeolite + binder
- the subject of the invention is a catalyst comprising a modified zeolite Y according to the invention and optionally a catalyst, in particular a catalytic metal.
- This metal can be deposited on the zeolite by a fixing step, for example impregnation.
- the catalytic metals mention may be made of platinum, palladium, nickel, cobalt and tungsten, but also the other transition metals.
- the subject of the invention is a catalyst comprising at least one zeolite as described above or a composite material comprising such a zeolite and optionally a catalyst supported on it.
- the object of the invention is the use of a catalyst or particles according to the invention in a process for the treatment of petroleum or heavy residues, especially as a hydroconversion catalyst in FCC. for example as a hydrocracking or hydroisomerization catalyst.
- the invention also relates to a method of manufacturing a catalyst comprising at least one step of impregnating a catalytic metal on a zeolite as described above.
- the methods used to measure the different characteristics are generally conventional techniques. More particularly, the following techniques have been used in the context of this invention: (i) the chemical composition, in particular the Si / Al atomic ratio and the sodium content, has been determined by atomic adsorption spectrometry (Central Service); CNRS, Solaize), ii) the structure of the zeolite was defined by X-ray diffraction (XRD) using a Bruker Advance D8 diffractometer using the Cobalt Ka 12 line, the spectra being recorded for angle 2 theta between 5 and 50 °,
- XRD X-ray diffraction
- FIG. 1 represents the nitrogen adsorption isotherms of a commercial Y zeolite (HY30) and two zeolites according to the invention
- FIG. 2 represents the dV / dlogD adsorption curves BJH as a function of the pore diameter (nm) measured for a commercial Y zeolite (HY30) and two zeolites according to the invention (HYA and HYB curves),
- FIGS. 3, 3A and 3B respectively represent a TEM-3D image of a commercial Y zeolite (HY30) and two zeolites according to the invention (HYA and HYB)
- FIGS. 4 and 4A represent a three-dimensional reconstruction a crystal of a commercial zeolite and a zeolite according to the invention (HYA)
- FIGS. 5 and 5A on the one hand and 6 and 6A on the other hand represent a three-dimensional reconstruction of the open / closed porosity of these same commercial zeolites and according to the invention
- FIG. 7 is a diagram showing the possible effect of a treatment according to the invention.
- FIG. 8 represents the degree of conversion (% by weight) as a function of the temperature ( 0 C) of the hydrocracking of n-hexadecane by a catalyst comprising commercial Y zeolite (HY30 / Pt) and a catalyst according to the invention (HYA / Pt);
- FIG. 9 represents the C6 / C10 ratio as a function of the conversion rate obtained for the hydrocracking of n-hexadecane by a catalyst comprising commercial Y zeolite (HY30 / Pt) and by a catalyst according to the invention (HYA / Pt);
- FIG. 10 represents the distribution (% by weight) of the hydrocracking products of squalane obtained by a catalyst comprising commercial zeolite Y and by a catalyst according to the invention, for a conversion rate of 75%.
- HY30 Zeolite Y sold under the name CBV760 by Zeolyst Int. is called here HY30.
- the nitrogen adsorption of HY30 is shown in FIG. 1, the characteristics of HY30 are given in Table 1.
- This zeolite Y underwent a dealumination before treatment to obtain a modified Y zeolite. It has a Si / Al ratio of 28.4, an acidity measured by TPD NH3 of 0.32 mmol / g and an Na content of less than 50 ppm.
- the compound HY30 is subjected to the following alkaline treatment:
- the product is then calcined at 500 ° C. for 4 hours (temperature gradient 1 ° C./min) with a stream of air, then
- the product HYA has a Si / Al ratio of 24.8, an acidity measured by TPD NH 3 of 0.20 mmol / g and an Na content of less than 50 ppm.
- the compound HY30 is subjected to the following alkaline treatment:
- the filtered product is dried for 12 hours at 80 ° C.
- the product is then calcined at 500 ° C. for 4 hours (temperature gradient 1 ° C./min) with a stream of air, then
- the product HYB has a Si / Al ratio of 20.5, an acidity measured by TPD NH3 of 0.21 mmol / g and an Na content of less than 50 ppm.
- the isothermal nitrogen adsorption curves for HY30, HYA and HYB are shown in FIG.
- the presence of a hysteresis loop on each of the isotherms shows the presence of mesopores in each of the samples.
- HY30 and weakly alkalized HYA samples The more severe alkaline treatment of HYB samples leads to a decrease in micropore volume and even greater mesoporosity.
- the BHJ adsorption clearly shows two distinct zones of micropore size:
- X-ray diffraction analysis confirms the preservation of the crystallinity of the HYA sample having undergone a mild alkaline treatment with respect to the starting compound HY30.
- the HYB sample with a more severe alkaline treatment shows a partial destruction of the crystalline order with a high degree of However, the overall crystallinity of the sample is re fl ected, the characteristic peaks always being present.
- the morphology of zeolite Y is further confirmed by the physisorption of nitrogen and electron microscopy.
- TEM micrographs show that large zeolite Y crystals remain intact, even after severe alkaline treatment. Inside all the particles, one observes the presence of mesopores in the form of channels and spheres, the channels penetrate in the particle, connecting the external surface inside the particle. In addition, the alkaline-treated samples appear to have a sponge-like structure, in contrast to the starting HY30 compound. TEM micrographs do not distinguish between the bonds between the pores and the shape and the general dimensions of the pores.
- Figures 3, 3A and 3B show a 3D reconstruction section of each of the three samples.
- FIG. 3 represents a section of sample HY30, of thickness 0.82 nm: the steam and acid treatment undergone by this sample is mainly responsible for the creation of large mesopores in the form of channels and spheres, with a wide range of diameters as shown by the physisorption of nitrogen.
- Channel-shaped mesopores intersect and penetrate the particle from the outside to the inside. The presence of isolated cavities is also confirmed.
- the physisorption of nitrogen shows that small mesopores are present for a volume almost identical to that of large mesopores, they seem to be absent.
- FIG. 3A represents a 0.82 nm thick section of the HYA sample having undergone a moderate alkaline treatment.
- a new series of small mesopores has appeared and the walls of mesopores in the form of channels and cavities are more irregular.
- the formation of small mesopores, and their diameter (2-5nm) can be measured with great precision and is in agreement with the results obtained from the physisorption of nitrogen.
- the small mesopores that appear appear to be evenly distributed over the entire volume of the particle and are interconnected.
- FIG. 3B represents a 0.54 nm thick section of the HYB sample having undergone a severe alkaline treatment. An increase in the number of small mesopores is observed, confirming the results of the physisorption of nitrogen. Pores with a diameter as small as 1.2 nm can be observed and the overall density of these small mesopores seems greater compared to the HYA compound. As for the HYA sample, the 3D reconstruction of the whole particle involves interconnections of these small mesopores.
- Figures 4 to 6 and 4A to 6A show the open and closed porosity of the compounds HY30 and HYA, respectively.
- the open porosity (FIGS. 5 and 5A) represents all the mesopores that are accessible from the outer surface of a crystal via mesopores.
- the closed porosity (FIGS. 6 and 6B) represents the mesopores accessible from the outer surface of a crystal only via the micropores, these figures thus represent the cavities.
- Figures 4 and 4A represent the entire volume of the HY30 crystal and HYA respectively analyzed.
- the dark areas represent the intracrystalline mesopores.
- FIGS. 5A and 6A show that the mesopore system of the HYA crystal corresponds substantially to the entire volume of the crystal, which is not the case of the mesopore system of HY30, which is visibly less important (FIG. 5).
- the number of cavities of the HYA crystal is considerably reduced compared with a zeolite Y which has not undergone an alkaline treatment (HY30).
- the very large volume of mesopores accessible from the outer surface of a HYA crystal via mesopores implies that these mesopores are interconnected.
- the HYA mesopore system is thus improved and has better interconnectivity compared to HY30.
- the steam treatment followed by an acid treatment essentially leads to the generation of mesopores of about 30 nm in the form of channels and cavities.
- modified zeolites according to the invention thus have a "trimodal" pore system, containing micropores, small mesopores and large mesopores, as schematically represented in FIG. 7.
- Example 3 Catalysis - Hydrocracking of N-Hexadecane Catalysts are prepared from HY30 (HY30 / Pt) and HYA (HYA / PT) by impregnation with a solution of platinum salts, in order to lead to a charge of Pt about 0.3% by weight based on the total weight of the catalyst.
- the catalysts were tested under the following conditions: WHSV: 1-4 h 1 H 2 / HC: 3-4 mol / mol; Pressure: 20 bar;
- FIG. 8 represents the degree of conversion as a function of temperature for HYA / Pt and HY30 / Pt.
- the activity gain of the HYA / Pt catalyst is of the order of 10 to 20 ° C. for the hydrocracking of n-hexadecane. .
- the reaction rate of the hydrocracking of n-hexadecane is more than 4 times greater for HYA / Pt than for HY30 / Pt, 4.1 ⁇ 10 -4 gs -1 .g -1 and 0.9 g. ⁇ .g 1 respectively.
- FIG. 9 represents the C6 / C10 ratio as a function of the conversion rate for the hydrocracking of n-hexadecane (C 16).
- the cracking symmetry can be characterized by the C6 / C10 ratio (mol / mol) which, in the case of "ideal hydrocracking", should be around 1.
- This cracking symmetry reflects the fact that the occurrence of secondary cracking, or gas manufacture, is significantly reduced over the entire range of conversion rates.
- HYA / Pt is close to an ideal hydrocracking behavior, the C6 / C10 ratio being very close to 1 over the entire range of the conversion rate.
- Example 4 Catalysis - Squalane Hydrocracking The hydrocracking of squalane was also tested.
- Squalane or hexamethyltetracosane is a paraffin-type organic molecule containing 30 carbon atoms, six of which are in methyl groups at positions 2, 6, 15, 19, and 23 respectively. Its steric hindrance is greater than that of hexadecane and may, to some extent, be used as a model molecule for hydrocracking feeds (high molecular weight).
- Catalysts are prepared from HY30 (HY30 / Pt) and HYA (HYA / PT) by impregnation with a solution of platinum salts, in order to lead to a Pt load of about 0.3% by weight relative to to the total weight of the catalyst.
- the catalysts were tested under the following conditions:
- FIG. 10 shows a significant decrease in the contribution of secondary cracking, and hence gas production, as well as improved selectivity and increased middle distillate yield for similar conversion rates.
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CA2748018A CA2748018C (fr) | 2008-12-22 | 2009-12-22 | Zeolites y modifiees a structure intracristalline trimodale, leur procede de fabrication et leur utilisation |
US13/141,281 US9126183B2 (en) | 2008-12-22 | 2009-12-22 | Modified Y-type zeolites having a trimodal intracrystalline structure, method for making same, and use thereof |
CN200980152072.5A CN102264643B (zh) | 2008-12-22 | 2009-12-22 | 具有三态晶内结构的改性y型沸石,其制备方法和用途 |
ES09805783T ES2665021T5 (es) | 2008-12-22 | 2009-12-22 | Zeolitas y modificadas de estructura intracristalina trimodal, procedimiento de fabricación y utilización |
JP2011541577A JP5783906B2 (ja) | 2008-12-22 | 2009-12-22 | Y型ゼオライト及びそれを製造する方法 |
DK09805783.9T DK2370359T4 (da) | 2008-12-22 | 2009-12-22 | Modificerede y-zeolitter med trimodal intrakrystallinsk struktur, fremgangsmåde til fremstilling heraf og anvendelse heraf |
EP09805783.9A EP2370359B2 (fr) | 2008-12-22 | 2009-12-22 | Zeolites y modifiees a structure intracristalline trimodale, leur procede de fabrication et leur utilisation |
RU2011130524/04A RU2510293C2 (ru) | 2008-12-22 | 2009-12-22 | Модифицированные цеолиты y с тримодальной внутрикристаллической структурой, способ их получения и их применение |
US14/808,519 US9242234B2 (en) | 2008-12-22 | 2015-07-24 | Modified Y-type zeolites having a trimodal intracrystalline structure, method for making same, and use thereof |
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FR0858952A FR2940265B1 (fr) | 2008-12-22 | 2008-12-22 | Zeolithes y modifiees, leur procede de fabrication et leur utilisation |
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US14/808,519 Continuation-In-Part US9242234B2 (en) | 2008-12-22 | 2015-07-24 | Modified Y-type zeolites having a trimodal intracrystalline structure, method for making same, and use thereof |
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ES (1) | ES2665021T5 (fr) |
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CN103889573A (zh) * | 2011-10-24 | 2014-06-25 | 道达尔炼油法国 | 用于制备加氢转化催化剂的方法、由此获得的催化剂及其在加氢转化方法中的用途 |
CN103930206A (zh) * | 2011-10-24 | 2014-07-16 | 道达尔炼油法国 | 用于制备包含介孔的催化剂的方法、由此获得的催化剂及其在加氢转化方法中的用途 |
KR20140091708A (ko) * | 2011-10-24 | 2014-07-22 | 토탈 라피나쥬 프랑스 | 수소첨가전환 촉매의 제조방법, 이에 따라 제조된 촉매 및 수소첨가전환 공정에서의 이의 용도 |
KR20140095503A (ko) * | 2011-10-24 | 2014-08-01 | 토탈 라피나쥬 프랑스 | 메조기공-함유 촉매의 제조방법, 이에 따라 획득된 촉매 및 이의 수소첨가전환 공정에서의 용도 |
KR20140095510A (ko) * | 2011-10-24 | 2014-08-01 | 토탈 라피나쥬 프랑스 | 메조기공화 촉매의 제조방법, 이에 따라 획득된 촉매, 및 이의 촉매공정에서의 용도 |
US20140249344A1 (en) * | 2011-10-24 | 2014-09-04 | Total Raffinage France | Process for preparing a mesoporized catalyst, catalyst thus obtained and use thereof in a catalytic process |
WO2013060705A2 (fr) | 2011-10-24 | 2013-05-02 | Total Raffinage Marketing | Procédé de préparation d'un catalyseur mésoporeux, catalyseur ainsi obtenu et utilisation de celui-ci dans un procédé catalytique |
WO2013060719A3 (fr) * | 2011-10-24 | 2013-08-22 | Total Raffinage Marketing | Procédé de préparation d'un catalyseur contenant des mésopores, catalyseur ainsi obtenu et son utilisation dans un procédé d'hydroconversion |
CN103889573B (zh) * | 2011-10-24 | 2016-08-24 | 道达尔炼油法国 | 用于制备加氢转化催化剂的方法、由此获得的催化剂及其在加氢转化方法中的用途 |
WO2013060719A2 (fr) | 2011-10-24 | 2013-05-02 | Total Raffinage Marketing | Procédé de préparation d'un catalyseur contenant des mésopores, catalyseur ainsi obtenu et son utilisation dans un procédé d'hydroconversion |
FR2981583A1 (fr) * | 2011-10-24 | 2013-04-26 | Total Raffinage Marketing | Procede de preparation d'un catalyseur contenant des mesopores, catalyseur ainsi obtenu et son utilisation dasn un procede d'hydroconversion |
FR2981584A1 (fr) * | 2011-10-24 | 2013-04-26 | Total Raffinage Marketing | Titre non renseigne. |
US9821298B2 (en) | 2011-10-24 | 2017-11-21 | Total Raffinage France | Process for preparing a hydroconversion catalyst, catalyst thus obtained and use thereof in a hydroconversion process |
CN107670700A (zh) * | 2011-10-24 | 2018-02-09 | 道达尔炼油法国 | 用于制备包含介孔的催化剂的方法、由此获得的催化剂及其在加氢转化方法中的用途 |
US10105688B2 (en) | 2011-10-24 | 2018-10-23 | Total Raffinage France | Process for preparing a mesopores-containing catalyst, catalyst thus obtained and use thereof in a hydroconversion process |
FR2981582A1 (fr) * | 2011-10-24 | 2013-04-26 | Total Raffinage Marketing | Procede de preparation d'un catalyseur d'hydroconversion, catalyseur ainsi obtenu et son utilisation dans un procede d'hydroconversion |
KR101996326B1 (ko) * | 2011-10-24 | 2019-07-04 | 토탈 라피나쥬 프랑스 | 메조기공화 촉매의 제조방법, 이에 따라 획득된 촉매, 및 이의 촉매공정에서의 용도 |
KR101996329B1 (ko) * | 2011-10-24 | 2019-07-04 | 토탈 라피나쥬 프랑스 | 수소첨가전환 촉매의 제조방법, 이에 따라 제조된 촉매 및 수소첨가전환 공정에서의 이의 용도 |
US10343150B2 (en) | 2011-10-24 | 2019-07-09 | Total Raffinage France | Process for preparing a mesoporized catalyst, catalyst thus obtained and use thereof in a catalytic process |
KR102008954B1 (ko) * | 2011-10-24 | 2019-08-08 | 토탈 라피나쥬 프랑스 | 메조기공-함유 촉매의 제조방법, 이에 따라 획득된 촉매 및 이의 수소첨가전환 공정에서의 용도 |
Also Published As
Publication number | Publication date |
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CN102264643B (zh) | 2015-05-20 |
US9126183B2 (en) | 2015-09-08 |
US20120018349A1 (en) | 2012-01-26 |
CA2748018C (fr) | 2017-08-08 |
FR2940265B1 (fr) | 2011-06-10 |
RU2011130524A (ru) | 2013-01-27 |
CA2748018A1 (fr) | 2010-07-01 |
DK2370359T4 (da) | 2022-07-25 |
ES2665021T3 (es) | 2018-04-24 |
RU2510293C2 (ru) | 2014-03-27 |
CN102264643A (zh) | 2011-11-30 |
EP2370359B1 (fr) | 2018-02-07 |
JP2012513359A (ja) | 2012-06-14 |
FR2940265A1 (fr) | 2010-06-25 |
EP2370359B2 (fr) | 2022-05-18 |
JP5783906B2 (ja) | 2015-09-24 |
EP2370359A1 (fr) | 2011-10-05 |
DK2370359T3 (en) | 2018-05-14 |
ES2665021T5 (es) | 2022-10-11 |
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