US20170072389A1 - Catalyst For A Naphtha Reforming Process - Google Patents
Catalyst For A Naphtha Reforming Process Download PDFInfo
- Publication number
- US20170072389A1 US20170072389A1 US15/121,903 US201515121903A US2017072389A1 US 20170072389 A1 US20170072389 A1 US 20170072389A1 US 201515121903 A US201515121903 A US 201515121903A US 2017072389 A1 US2017072389 A1 US 2017072389A1
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- US
- United States
- Prior art keywords
- catalyst
- zeolite
- present disclosure
- zsm
- alumina support
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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- 239000003054 catalyst Substances 0.000 title claims abstract description 58
- 238000002407 reforming Methods 0.000 title abstract description 26
- 238000000034 method Methods 0.000 title abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 33
- 239000002184 metal Substances 0.000 claims abstract description 33
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000010457 zeolite Substances 0.000 claims abstract description 30
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 29
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 24
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 13
- 239000011248 coating agent Substances 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 7
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 23
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 17
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 12
- 239000000377 silicon dioxide Substances 0.000 claims description 9
- 229910052593 corundum Inorganic materials 0.000 claims description 8
- 229910052697 platinum Inorganic materials 0.000 claims description 8
- 229910052718 tin Inorganic materials 0.000 claims description 8
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 8
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 7
- 229910052681 coesite Inorganic materials 0.000 claims description 7
- 229910052906 cristobalite Inorganic materials 0.000 claims description 7
- 229910052682 stishovite Inorganic materials 0.000 claims description 7
- 229910052905 tridymite Inorganic materials 0.000 claims description 7
- 229910052741 iridium Inorganic materials 0.000 claims description 5
- 229910052702 rhenium Inorganic materials 0.000 claims description 5
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052680 mordenite Inorganic materials 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910052763 palladium Inorganic materials 0.000 claims description 4
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 claims description 4
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 8
- 150000002739 metals Chemical class 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
- 239000008096 xylene Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000571 coke Substances 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- URLKBWYHVLBVBO-UHFFFAOYSA-N Para-Xylene Chemical group CC1=CC=C(C)C=C1 URLKBWYHVLBVBO-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 150000001335 aliphatic alkanes Chemical class 0.000 description 2
- 150000001491 aromatic compounds Chemical class 0.000 description 2
- 238000006356 dehydrogenation reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000001588 bifunctional effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000004517 catalytic hydrocracking Methods 0.000 description 1
- 238000001833 catalytic reforming Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000020335 dealkylation Effects 0.000 description 1
- 238000006900 dealkylation reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000006317 isomerization reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006057 reforming reaction Methods 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 150000003738 xylenes Chemical class 0.000 description 1
Images
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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
- C10G35/00—Reforming naphtha
- C10G35/04—Catalytic reforming
- C10G35/06—Catalytic reforming characterised by the catalyst used
- C10G35/085—Catalytic reforming characterised by the catalyst used containing platinum group metals or compounds thereof
- C10G35/09—Bimetallic catalysts in which at least one of the metals is a platinum group metal
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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
- C10G35/00—Reforming naphtha
- C10G35/04—Catalytic reforming
- C10G35/06—Catalytic reforming characterised by the catalyst used
- C10G35/095—Catalytic reforming characterised by the catalyst used containing crystalline alumino-silicates, e.g. molecular sieves
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- B01J35/40—Catalysts, in general, characterised by their form or physical properties characterised by dimensions, e.g. grain size
Definitions
- the present disclosure relates to a catalyst for a naphtha reforming process.
- An active metal is a Group VIII metal of the modern periodic table.
- the Group VIII metals are platinum (Pt), palladium (Pd) and nickel (Ni).
- ZSM-5 is an aluminosilicate zeolite belonging to the pentasil family of zeolites and its chemical formula is Na n Al n Si 96-n O 192 .16H 2 O (0 ⁇ n ⁇ 27).
- Mordenite is a zeolite mineral with the chemical formula Al 2 Si 10 O 24 .7H 2 O.
- Ultra-stable Y (USY) zeolite is a form of type Y zeolite with the majority of sodium ions removed and treated thermally to enhance its thermal and steam stability.
- H-beta zeolite is a high-silica content zeolite having full three dimensional 12-ring pore system.
- MCM-22 is a type of zeolite having unique phase and good crystallinity.
- ZSM-12 is a type of pentasil zeolite having silica to alumina ratio above 33.
- Catalytic naphtha reforming is an important industrial process.
- the naphtha feedstock used for catalytic reforming contains naphthenic hydrocarbons, paraffinic hydrocarbons and aromatic hydrocarbons of different carbon numbers.
- the major reactions in naphtha reforming process include dehydrogenation of naphthenes, dehydrocyclization of paraffins, isomerization of paraffins and hydrocracking.
- the chemical reactions in reforming process occur in presence of a catalyst and a high partial pressure of hydrogen.
- the catalysts used for reforming process are usually bifunctional in nature (i.e. having metal function and the acidic function).
- naphtha is processed over the conventional acidic reforming catalysts where, one or more dehydrogenation metals, i.e.
- noble metals with stabilizing metal ions are supported on chlorided Al 2 O 3 .
- These conventional reforming catalysts comprises platinum alone or along with Re, Ir, Sn or Ge as a promoter metals on gamma alumina support.
- Re, Ir, Sn or Ge as a promoter metals on gamma alumina support.
- the gamma alumina support of the conventional reforming catalysts consists of corrosive and non-eco-friendly ingredients such as chloride that provides required acidity essential for the process.
- the activity of the conventional catalysts decreases due to the formation and accumulation of coke on the catalyst as well as by sintering of metals on the catalyst surface during the naphtha reforming process.
- the C8 aromatic isomers formed i.e., ethyl benzene (EB), para-xylenes (p-X), meta-xylenes (m-X), and ortho-xylenes (o-X) appear in thermodynamic equilibrium with the product.
- EB ethyl benzene
- p-X para-xylenes
- m-X meta-xylenes
- o-X ortho-xylenes
- the present disclosure provides a catalyst for a naphtha reforming process.
- the catalyst comprises a chloride free zeolite coated alumina support impregnated with 0.01 wt % to 0.5 wt % active metal and 0.01 wt % to 0.5 wt % promoter metal, the thickness of the zeolite coating on the chloride free alumina support ranges from 100 ⁇ m to 200 ⁇ m.
- the zeolite is at least one selected from a group consisting of ZSM-5, mordenite, USY, H-Beta, MCM-22, and ZSM-12.
- the zeolite is ZSM-5 comprising SiO 2 and Al 2 O 3 and the ratio of SiO 2 to Al 2 O 3 in ZSM-5 is 15:1.
- the active metal is at least one selected from the group consisting of platinum (Pt), palladium (Pd) and nickel (Ni).
- the promoter metal is at least one selected from the group consisting of tin (Sn), rhenium (Re) and Iridium (Ir).
- FIG. 1 illustrates the SEM micrograph of a catalyst in accordance with the present disclosure; wherein the catalyst depicts the thickness of the zeolite coating of size 135 microns.
- the present disclosure provides a catalyst for a naphtha reforming process.
- the catalyst of the present disclosure is used for reforming of naphtha.
- the present disclosure provides a catalyst that comprises of a chloride free zeolite coated alumina support impregnated with 0.01 wt % to 0.5 wt % active metal and 0.01 wt % to 0.5 wt % promoter metal.
- the thickness of the zeolite coating on the chloride free alumina support ranges from 100 ⁇ m to 200 ⁇ m.
- the zeolite is at least one selected from a group consisting of ZSM-5, mordenite, USY, H-Beta, MCM-22, and ZSM-12.
- the zeolite is ZSM-5 comprising SiO 2 and Al 2 O 3 .
- the ratio of SiO 2 to Al 2 O 3 in ZSM-5 ranges from 10:1 to 20:1.
- the ratio of SiO 2 to Al 2 O 3 in ZSM-5 is 15:1.
- Examples of the active metals impregnated in the catalyst include platinum (Pt), palladium (Pd) and nickel (Ni).
- the active metal impregnated in the catalyst is platinum (Pt).
- the concentration of the platinum (Pt) ranges from 0.01 wt % to 0.75 wt %.
- promoter metals impregnated in the catalyst examples include tin (Sn), rhenium (Re) and Iridium (Ir).
- the metal impregnated in the catalyst is tin (Sn).
- the concentration of the tin (Sn) ranges from 0.01 wt % to 0.75 wt %.
- the alumina support of the conventional catalyst contains chloride which makes the catalyst highly acidic. Due to this, undesired C 1 to C 4 gaseous products are formed by cracking reaction during the reforming process.
- the catalyst of the present disclosure comprises a chloride free alumina support coated with the zeolite and impregnated with 0.01 wt % to 0.5 wt % active metal and 0.01 wt % to 0.5 wt % promoter metal, which provides optimum acidity to the catalyst resulting into lower cracking during the reforming process. This leads in the reduction in formation and accumulation of coke on the catalyst surface, and sintering of metals on the catalyst surface during the reforming process. Due to this, the selectivity and the yield of desired hydrocarbons including desired aromatic compounds are improved.
- the catalyst of the present disclosure comprises a chloride free zeolite coated alumina support impregnated with 0.01 wt % to 0.5 wt % active metal and 0.01 wt % to 0.5 wt % promoter metal.
- the thickness of the zeolite coating on the chloride free alumina support is illustrated in the following example:
- FIG. 1 illustrates the SEM micrograph of a catalyst in accordance with the present disclosure; wherein the catalyst depicts the thickness of the zeolite coating of size 135 microns.
- the catalyst of the present disclosure described herein above shows that it overcomes the problems faced by the conventional catalyst.
- the present disclosure relates to the catalyst.
- the catalyst has several technical advancements:
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Abstract
The present disclosure relates to a catalyst for a naphtha reforming process. The catalyst comprises a chloride free zeolite coated alumina support impregnated with 0.01 wt % to 0.5 wt % active metal and 0.01 wt % to 0.5 wt % promoter metal, characterized in that the thickness of the zeolite coating on the alumina support ranges from 100 μm to 200 μm.
Description
- The present disclosure relates to a catalyst for a naphtha reforming process.
- An active metal is a Group VIII metal of the modern periodic table. The Group VIII metals are platinum (Pt), palladium (Pd) and nickel (Ni).
- A promoter metal is a Group IV metal of the modern periodic table. The Group IV metals are tin (Sn), rhenium (Re) and iridium (Ir).
- ZSM-5 is an aluminosilicate zeolite belonging to the pentasil family of zeolites and its chemical formula is NanAlnSi96-nO192.16H2O (0<n<27).
- Mordenite is a zeolite mineral with the chemical formula Al2Si10O24.7H2O.
- Ultra-stable Y (USY) zeolite is a form of type Y zeolite with the majority of sodium ions removed and treated thermally to enhance its thermal and steam stability.
- H-beta zeolite is a high-silica content zeolite having full three dimensional 12-ring pore system.
- MCM-22 is a type of zeolite having unique phase and good crystallinity.
- ZSM-12 is a type of pentasil zeolite having silica to alumina ratio above 33.
- Catalytic naphtha reforming is an important industrial process. During the naphtha reforming process, mainly low-octane straight chain alkanes (paraffins), with 6-10 carbon atoms, are reformed into molecules having branched alkanes (isoparaffins) and cyclic naphthenes, which are then partially dehydrogenated to produce high-octane aromatic hydrocarbons such as benzene, toluene and xylenes (BTX) in the reformate. The naphtha feedstock used for catalytic reforming contains naphthenic hydrocarbons, paraffinic hydrocarbons and aromatic hydrocarbons of different carbon numbers. The major reactions in naphtha reforming process include dehydrogenation of naphthenes, dehydrocyclization of paraffins, isomerization of paraffins and hydrocracking. The chemical reactions in reforming process occur in presence of a catalyst and a high partial pressure of hydrogen. The catalysts used for reforming process are usually bifunctional in nature (i.e. having metal function and the acidic function). In a typical reforming process, naphtha is processed over the conventional acidic reforming catalysts where, one or more dehydrogenation metals, i.e. noble metals with stabilizing metal ions are supported on chlorided Al2O3.These conventional reforming catalysts comprises platinum alone or along with Re, Ir, Sn or Ge as a promoter metals on gamma alumina support. However, it is observed that reforming of naphtha in the presence of conventional catalysts results in undesired products.
- Further, the gamma alumina support of the conventional reforming catalysts consists of corrosive and non-eco-friendly ingredients such as chloride that provides required acidity essential for the process. However, the activity of the conventional catalysts decreases due to the formation and accumulation of coke on the catalyst as well as by sintering of metals on the catalyst surface during the naphtha reforming process.
- In the conventional reforming process, the C8 aromatic isomers formed i.e., ethyl benzene (EB), para-xylenes (p-X), meta-xylenes (m-X), and ortho-xylenes (o-X) appear in thermodynamic equilibrium with the product. Generally, the ethyl benzene formed during the conventional reforming takes an idle ride in the post reforming downstream p-xylene recovery unit, thus occupying unit capacity and leading to undesired operating cost.
- Therefore, there is a need of a catalyst which reduces the formation of ethylbenzene in the product. Further, there is a need of a catalyst that overcomes the drawbacks associated with the conventional catalyst.
- Some of the objects of the present disclosure, which at least one embodiment herein satisfies, are as follows:
- It in an object of the present disclosure to provide a catalyst for reforming of naphtha.
- It is another object of the present disclosure to provide a catalyst which possesses dual functionality (i.e. the catalyst can be used for reforming as well as dealkylation).
- It is yet another object of the present disclosure to provide a catalyst with optimum acidity for reforming reaction.
- It is still another object of the present disclosure to provide a catalyst with reduce corrosive effects on process unit.
- It is still another object of the present disclosure to provide an efficient and eco-friendly catalyst.
- It is a further object of the present disclosure to ameliorate one or more problems associated with the conventional catalysts or at least provide a useful alternative.
- Other objects and advantages of the present disclosure will be more apparent from the following description which is not intended to limit the scope of the present disclosure.
- The present disclosure provides a catalyst for a naphtha reforming process. The catalyst comprises a chloride free zeolite coated alumina support impregnated with 0.01 wt % to 0.5 wt % active metal and 0.01 wt % to 0.5 wt % promoter metal, the thickness of the zeolite coating on the chloride free alumina support ranges from 100 μm to 200 μm.
- The zeolite is at least one selected from a group consisting of ZSM-5, mordenite, USY, H-Beta, MCM-22, and ZSM-12.
- In accordance with the present disclosure, the zeolite is ZSM-5 comprising SiO2 and Al2O3 and the ratio of SiO2 to Al2O3 in ZSM-5 is 15:1.
- The active metal is at least one selected from the group consisting of platinum (Pt), palladium (Pd) and nickel (Ni).
- The promoter metal is at least one selected from the group consisting of tin (Sn), rhenium (Re) and Iridium (Ir).
- The disclosure will now be described with reference to the accompanying non-limiting drawings:
-
FIG. 1 illustrates the SEM micrograph of a catalyst in accordance with the present disclosure; wherein the catalyst depicts the thickness of the zeolite coating of size 135 microns. - The present disclosure provides a catalyst for a naphtha reforming process. The catalyst of the present disclosure is used for reforming of naphtha.
- In a first aspect, the present disclosure provides a catalyst that comprises of a chloride free zeolite coated alumina support impregnated with 0.01 wt % to 0.5 wt % active metal and 0.01 wt % to 0.5 wt % promoter metal. The thickness of the zeolite coating on the chloride free alumina support ranges from 100 μm to 200 μm.
- The zeolite is at least one selected from a group consisting of ZSM-5, mordenite, USY, H-Beta, MCM-22, and ZSM-12.
- In accordance with one embodiment, the zeolite is ZSM-5 comprising SiO2 and Al2O3.
- In accordance with one embodiment, the ratio of SiO2 to Al2O3 in ZSM-5 ranges from 10:1 to 20:1.
- In accordance with another embodiment, the ratio of SiO2 to Al2O3 in ZSM-5 is 15:1.
- Examples of the active metals impregnated in the catalyst include platinum (Pt), palladium (Pd) and nickel (Ni).
- In accordance with one embodiment, the active metal impregnated in the catalyst is platinum (Pt).
- In accordance with another embodiment, the concentration of the platinum (Pt) ranges from 0.01 wt % to 0.75 wt %.
- Examples of the promoter metals impregnated in the catalyst include tin (Sn), rhenium (Re) and Iridium (Ir).
- In accordance with one embodiment, the metal impregnated in the catalyst is tin (Sn).
- In accordance with another embodiment, the concentration of the tin (Sn) ranges from 0.01 wt % to 0.75 wt %.
- The alumina support of the conventional catalyst contains chloride which makes the catalyst highly acidic. Due to this, undesired C1 to C4 gaseous products are formed by cracking reaction during the reforming process.
- The catalyst of the present disclosure comprises a chloride free alumina support coated with the zeolite and impregnated with 0.01 wt % to 0.5 wt % active metal and 0.01 wt % to 0.5 wt % promoter metal, which provides optimum acidity to the catalyst resulting into lower cracking during the reforming process. This leads in the reduction in formation and accumulation of coke on the catalyst surface, and sintering of metals on the catalyst surface during the reforming process. Due to this, the selectivity and the yield of desired hydrocarbons including desired aromatic compounds are improved.
- The present disclosure is further illustrated herein below with the help of the following examples. The examples used herein are intended merely to facilitate an understanding of the ways in which the embodiments herein may be practiced and to further enable those of skilled in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
- The catalyst of the present disclosure comprises a chloride free zeolite coated alumina support impregnated with 0.01 wt % to 0.5 wt % active metal and 0.01 wt % to 0.5 wt % promoter metal. The thickness of the zeolite coating on the chloride free alumina support is illustrated in the following example:
-
FIG. 1 illustrates the SEM micrograph of a catalyst in accordance with the present disclosure; wherein the catalyst depicts the thickness of the zeolite coating of size 135 microns. - The catalyst of the present disclosure described herein above shows that it overcomes the problems faced by the conventional catalyst.
- The present disclosure relates to the catalyst. The catalyst has several technical advancements:
-
- the alumina support of the catalyst does not contain chloride;
- the catalyst has optimum acidity due to presence of chlorine free zeolite layer on the catalyst surface which results into less chain cracking and reduced coke formation during the reforming process.
- the selectivity of desired hydrocarbons is improved; and
- the yield of desired aromatic compounds is improved.
- Throughout this specification the word “comprise”, or variations such as “comprises” or “comprising”, will be understood to imply the inclusion of a stated element, integer or step, or group of elements, integers or steps, but not the exclusion of any other element, integer or step, or group of elements, integers or steps.
- The use of the expression “at least” or “at least one” suggests the use of one or more elements or ingredients or quantities, as the use may be in the embodiment of the invention to achieve one or more of the desired objects or results. While certain embodiments of the inventions have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the inventions. Variations or modifications to the formulation of this invention, within the scope of the invention, may occur to those skilled in the art upon reviewing the disclosure herein. Such variations or modifications are well within the spirit of this invention.
- The numerical values given for various physical parameters, dimensions and quantities are only approximate values and it is envisaged that the values higher than the numerical value assigned to the physical parameters, dimensions and quantities fall within the scope of the invention unless there is a statement in the specification to the contrary.
Claims (8)
1. A catalyst comprising a chloride free zeolite coated alumina support impregnated with 0.01 wt % to 0.5 wt % active metal and 0.01 wt % to 0.5 wt % promoter metal, wherein the thickness of said zeolite coating on said chloride free alumina support ranges from 100 μm to 200 μm.
2. The catalyst as claimed in claim 1 , wherein said zeolite is at least one selected from a group consisting of ZSM-5, mordenite, USY, H-Beta, MCM-22, and ZSM-12.
3. The catalyst as claimed in claim 1 , wherein said zeolite is ZSM-5 comprising SiO2 and Al2O3.
4. The catalyst as claimed in claim 3 , wherein said zeolite is ZSM-5 having the ratio of SiO2 to Al2O3 ranging from 10:1 to 20:1, preferably 15:1.
5. The catalyst as claimed in claim 1 , wherein said active metal is at least one selected from the group consisting of platinum (Pt), palladium (Pd) and nickel (Ni).
6. The catalyst as claimed in claim 1 , wherein said active metal is platinum (Pt).
7. The catalyst as claimed in claim 1 , wherein said promoter metal is at least one selected from the group consisting of tin (Sn), rhenium (Re) and Iridium (Ir).
8. The catalyst as claimed in claim 1 , wherein said promoter metal is tin (Sn).
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IN717/MUM/2014 | 2014-02-28 | ||
IN717MU2014 | 2014-02-28 | ||
PCT/IB2015/051421 WO2015128822A1 (en) | 2014-02-28 | 2015-02-26 | A catalyst for a naphtha reforming process |
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US20170072389A1 true US20170072389A1 (en) | 2017-03-16 |
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US15/121,905 Expired - Fee Related US10343149B2 (en) | 2014-02-28 | 2015-02-26 | Process for preparing a catalyst |
US15/121,903 Abandoned US20170072389A1 (en) | 2014-02-28 | 2015-02-26 | Catalyst For A Naphtha Reforming Process |
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US15/121,905 Expired - Fee Related US10343149B2 (en) | 2014-02-28 | 2015-02-26 | Process for preparing a catalyst |
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Cited By (1)
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WO2021236971A1 (en) * | 2020-05-20 | 2021-11-25 | The Johns Hopkins University | Efficient and selective conversion of high-density polyethylene into valuable hydrocarbons |
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CN110548535B (en) * | 2018-05-31 | 2022-01-04 | 中国石油化工股份有限公司 | Reforming catalyst and preparation method and application thereof |
US11001767B2 (en) | 2019-04-26 | 2021-05-11 | Exxonmobil Research And Engineering Company | Naphtha reformer yield using modified zeolitic catalysts |
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US5200382A (en) * | 1991-11-15 | 1993-04-06 | Exxon Research And Engineering Company | Catalyst comprising thin shell of catalytically active material bonded onto an inert core |
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US5763347A (en) * | 1994-07-08 | 1998-06-09 | Exxon Research And Engineering Company | In-situ crystallized zeolite containing composition (LAI-ISC) |
SE9600970D0 (en) * | 1996-03-14 | 1996-03-14 | Johan Sterte | Process for making very thin films of molecular sieves |
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JP3489048B2 (en) * | 2000-02-01 | 2004-01-19 | 日産自動車株式会社 | Exhaust gas purification catalyst |
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WO2004000767A1 (en) * | 2002-06-19 | 2003-12-31 | Exxonmobil Chemical Patents Inc. | Manufacture of xylenes from reformate |
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US7375047B1 (en) * | 2005-09-14 | 2008-05-20 | Uop Llc | Ethylbenzene conversion and xylene isomerization processes and catalysts therefor |
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KR20130017165A (en) * | 2011-08-10 | 2013-02-20 | 서강대학교산학협력단 | Zeolite core/silica zeolite shell composites, method of prefaring the same and catalystic use the same |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2021236971A1 (en) * | 2020-05-20 | 2021-11-25 | The Johns Hopkins University | Efficient and selective conversion of high-density polyethylene into valuable hydrocarbons |
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US9827557B2 (en) | 2017-11-28 |
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WO2015128823A3 (en) | 2016-01-07 |
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US10343149B2 (en) | 2019-07-09 |
CA2940798A1 (en) | 2015-09-03 |
SA516371751B1 (en) | 2019-10-16 |
EP3110911A1 (en) | 2017-01-04 |
US20170072387A1 (en) | 2017-03-16 |
WO2015128822A1 (en) | 2015-09-03 |
SA516371749B1 (en) | 2019-08-06 |
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