WO2022119190A1 - 링 타입 금속분포를 가지는 탈수소화 촉매 - Google Patents
링 타입 금속분포를 가지는 탈수소화 촉매 Download PDFInfo
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- WO2022119190A1 WO2022119190A1 PCT/KR2021/016936 KR2021016936W WO2022119190A1 WO 2022119190 A1 WO2022119190 A1 WO 2022119190A1 KR 2021016936 W KR2021016936 W KR 2021016936W WO 2022119190 A1 WO2022119190 A1 WO 2022119190A1
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- Prior art keywords
- catalyst
- platinum
- tin
- dehydrogenation
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- 239000003054 catalyst Substances 0.000 title claims abstract description 87
- 238000006356 dehydrogenation reaction Methods 0.000 title claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 title claims description 18
- 239000002184 metal Substances 0.000 title claims description 18
- 238000009826 distribution Methods 0.000 title claims description 7
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 70
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 35
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000011591 potassium Substances 0.000 claims abstract description 17
- 229910052700 potassium Inorganic materials 0.000 claims abstract description 17
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 10
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 10
- 102000002322 Egg Proteins Human genes 0.000 claims abstract description 8
- 108010000912 Egg Proteins Proteins 0.000 claims abstract description 8
- 210000003278 egg shell Anatomy 0.000 claims abstract description 8
- 238000006555 catalytic reaction Methods 0.000 claims abstract description 3
- 229910052718 tin Inorganic materials 0.000 claims description 20
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 abstract description 15
- 239000001294 propane Substances 0.000 abstract description 7
- 239000001273 butane Substances 0.000 abstract description 2
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 abstract description 2
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 16
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 11
- 239000011148 porous material Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 8
- 239000000571 coke Substances 0.000 description 8
- 239000004480 active ingredient Substances 0.000 description 7
- FHMDYDAXYDRBGZ-UHFFFAOYSA-N platinum tin Chemical compound [Sn].[Pt] FHMDYDAXYDRBGZ-UHFFFAOYSA-N 0.000 description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000002243 precursor Substances 0.000 description 6
- 239000011259 mixed solution Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 125000004122 cyclic group Chemical group 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 229910052783 alkali metal Inorganic materials 0.000 description 3
- 150000001340 alkali metals Chemical class 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 238000004453 electron probe microanalysis Methods 0.000 description 3
- -1 ethylene glycol Chemical compound 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 239000012188 paraffin wax Substances 0.000 description 3
- 238000009718 spray deposition Methods 0.000 description 3
- 239000011135 tin Substances 0.000 description 3
- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000011149 active material Substances 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- 239000012495 reaction gas Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000011946 reduction process Methods 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 238000007086 side reaction Methods 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 125000002015 acyclic group Chemical group 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 238000010574 gas phase reaction Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Images
Classifications
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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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/42—Platinum
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/58—Platinum group metals with alkali- or alkaline earth metals
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/62—Platinum group metals with gallium, indium, thallium, germanium, tin or lead
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/62—Platinum group metals with gallium, indium, thallium, germanium, tin or lead
- B01J23/622—Platinum group metals with gallium, indium, thallium, germanium, tin or lead with germanium, tin or lead
- B01J23/626—Platinum group metals with gallium, indium, thallium, germanium, tin or lead with germanium, tin or lead with tin
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
-
- B01J35/396—
-
- B01J35/397—
-
- B01J35/399—
-
- B01J35/51—
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C5/00—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
- C07C5/32—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with formation of free hydrogen
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C5/00—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
- C07C5/32—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with formation of free hydrogen
- C07C5/321—Catalytic processes
- C07C5/324—Catalytic processes with metals
- C07C5/325—Catalytic processes with metals of the platinum group
Definitions
- the present invention relates to a dehydrogenation catalyst and a method for preparing the same, and more particularly, to a spherical platinum catalyst containing tin and potassium components used in the dehydrogenation catalysis of light hydrocarbons in the C3 to C5 range, such as propane and butane.
- a dehydrogenation catalyst having a ring-type metal distribution in which a platinum component is not present on the catalyst surface and a platinum component is present in the form of a ring of a predetermined thickness at a predetermined depth from the catalyst surface.
- the tin component exists in an egg-shell form only to a certain depth from the catalyst surface, and the potassium component is uniformly distributed throughout the catalyst.
- Light olefins are materials used for various commercial purposes, such as plastics, synthetic rubbers, pharmaceuticals, and raw materials for chemical products, and can be produced by the following dehydrogenation of light hydrocarbons.
- Catalysts that promote the light hydrocarbon dehydrogenation reaction are mainly spherical shaped carriers with micropores such as gamma/theta/alpha alumina, zeolite, silica, and spinel-type metal aluminate. These materials have no effect on coke resistance or product selectivity. However, as the reaction progresses, if the amount of coke accumulated in the catalyst gradually increases, the micropores are blocked by the coke, and the active metals present inside the pores are eventually deactivated without participating in the reaction. Accordingly, there is a need for a support structure capable of reducing side reactions such as cracking and coke deposition.
- the loss of active metal is also a major factor in reducing the conversion rate, and the loss of active metal, especially in the case of a fluidized reactor, may cause the catalyst surface to be broken or worn due to friction between the catalyst and the catalyst while the catalyst flows and friction between the catalyst and the reactor. have.
- the surface of the catalyst may be clogged with coke due to cracking reactions that occur in a chain, so a ring-type catalyst structure lacking active metal on the surface is such shortcomings can be addressed.
- An object of the present invention is to prevent a decrease in mass transfer by suppressing surface coke deposition, which inevitably occurs in catalysts used in the dehydrogenation reaction of light hydrocarbons, and to reduce the loss of platinum active points due to wear in a fluidized bed reactor. .
- the above object can be achieved by a catalyst for dehydrogenation of light hydrocarbons in which platinum is distributed in a ring shape over a thickness of 200 to 500 ⁇ m at a depth of 30 to 200 ⁇ m from the surface of the spherical support.
- the tin component is present in an egg-shell form only to a certain depth from the catalyst surface, and the potassium component may be uniformly supported inside the carrier.
- a feature of the present invention is to provide a spherical platinum catalyst containing tin and potassium components used in the catalyst reaction for dehydrogenation of light hydrocarbons, and there is no platinum component on the catalyst surface, and a ring shape of a certain thickness at a certain depth from the catalyst surface
- a platinum component may be present.
- the tin component may exist in an egg-shell form only to a certain depth from the catalyst surface, and the potassium component may be uniformly distributed throughout the catalyst.
- a predetermined depth for forming a ring structure may be 30 ⁇ 200um, and a predetermined thickness may be configured of 200 ⁇ 500um.
- the platinum active component does not exist on the surface of the catalyst, but is spaced apart from the surface and exists in the form of a ring of a certain thickness.
- the deactivation rate of the catalyst is reduced in the durability test while having the same level of activity compared to the catalyst of the conventional acyclic active ingredient, so that the activity is equal to or higher than the same level even after 24 hours of abrasion test looks like
- 1 is a schematic diagram showing clogging of pores by coke in a catalyst with or without an active ingredient on the catalyst surface.
- 3 is a graph showing a change in conversion rate over time.
- the active metal cyclic catalyst according to the present invention is a catalyst in the form of which a porous alumina carrier is applied and impregnated with platinum, tin, and potassium.
- platinum it is located at a depth of 30 to 200 ⁇ m from the surface of the carrier and is distributed to a thickness of 200 to 500 ⁇ m, and potassium is uniformly distributed throughout the interior of the carrier.
- the catalyst refers to a spherical catalyst, in which active ingredients and/or sub-components are supported on a spherical support.
- the presence of the active ingredient in a cyclic or ring-type form means that the active ingredient is spaced apart from the catalyst surface and exists in a certain thickness, which is distinguished from the presence of the tin ingredient in an egg-shell form.
- the egg-shell form exists with a certain thickness from the catalyst surface toward the catalyst center, and is distinguished from the ring form in that it forms a thickness directly from the catalyst surface.
- the active ingredient is mainly described with palladium, and tin and potassium ingredients are exemplified in the subsidy, but the present invention is not limited thereto, and metal ingredients having the same purpose and function understood by those skilled in the art can be easily applied in the present invention, of course. to be.
- the cyclic platinum catalyst having a specific structure according to the present invention can be schematically prepared through the following steps.
- a platinum-tin mixed solution is prepared by mixing a platinum precursor and a tin precursor solution, but platinum is easily precipitated in air due to the high reducibility of tin.
- hydrochloric acid an inorganic acid
- an alcohol such as ethylene glycol, a dihydric alcohol
- deionized water is used as the solvent.
- Alkali metal support and fixation Alkali metal is supported in order to suppress side reactions caused by acid sites remaining on the porous alumina support. Potassium is supported in the pores of the carrier by a spray deposition method, dried in a dryer at 120 degrees or higher for 12 hours or more, and calcined in an air atmosphere in the range of 400-700 degrees to fix potassium in the carrier.
- the reduction process is performed using hydrogen gas within the range of 400-600 degrees to obtain the final catalyst.
- the temperature is less than 400 degrees, the metal oxidizing species may not be completely reduced, and if the temperature is higher than 600 degrees, aggregation and sintering of the metal particles may occur, thereby reducing the active point.
- Electron probe X-ray microanalyzer (hereinafter referred to as EPMA) analysis was performed to confirm the distribution of metal active materials for the catalyst according to the present invention, and friction between the catalyst and the catalyst generated in the fluidized reactor and friction between the catalyst and the reaction were realized In order to do this, the catalyst and sus ball are put into a plastic bottle and rotated to conduct a wear test.
- EPMA Electron probe X-ray microanalyzer
- paraffin, isoparaffin a hydrocarbon having a number of carbon atoms of 2 to 5, preferably 3 to 4, including alkyl aromatics
- the dehydrogenation reaction is carried out as a gas phase reaction under the conditions of 570° C., 0-2 atm, preferably 1.5 atm, and a Liquid Hourly Space Velocity (LHSV) of 1-40 h ⁇ 1 of paraffin hydrocarbons.
- LHSV Liquid Hourly Space Velocity
- a bead-type alumina carrier was used by heat treatment at 1050 degrees.
- the heat-treated alumina has physical properties of a specific surface area of 95 m 2 /g, a pore volume of 0.4 cm 3 /g, and an average pore size of 12 nm.
- Chloroplatinic acid was used as a platinum precursor and tin chloride was used as a tin precursor, and 0.2 wt% of tin chloride, 6 wt% of ethylene glycol, and hydrochloric acid of 10% of the total solution were mixed.
- chloroplatinic acid corresponding to 0.4wt% of the total weight of the catalyst was added to prepare a platinum-tin solution, and then this was added and dissolved in deionized water in an amount corresponding to the total pore volume of the carrier. Then, the prepared platinum-tin solution was impregnated into the heat-treated alumina carrier using a spray deposition method.
- the platinum-tin-supported composition was dried at 120° C. for 12 hours and then heat treated at 550° C. in an air atmosphere for 3 hours to fix the active metal.
- a metal-supported catalyst was prepared through a heat treatment process.
- a catalyst was prepared by raising the temperature in an air atmosphere to 550° C. in a step manner in the catalytic reduction process, and maintaining it in a hydrogen atmosphere for 1 hour.
- a comparative catalyst was prepared by using alumina heat-treated as in Example 1 as a carrier, but sequentially impregnating with platinum, tin, and potassium. Using chloroplatinic acid as a platinum precursor, a solution of 0.4wt% of platinum and 10wt% of the total solution of hydrochloric acid based on the total weight of the catalyst is diluted in deionized water corresponding to the total pore volume of the carrier and sprayed. It was impregnated in the carrier by the support method. The platinum-supported composition was dried and heat-treated as in Example 1 to fix the active metal.
- a solution of 0.2 wt% of tin and the same amount of hydrochloric acid as in the platinum input step is supported in the same manner as in the step of adding tin to the total weight of the catalyst, followed by drying and heat treatment.
- Potassium nitride corresponding to 0.8wt% of the total weight of the catalyst and nitric acid corresponding to 1% of the total solution are mixed, diluted in deionized water, impregnated in the same manner, dried and calcined.
- Catalyst reduction was carried out in a step manner to prepare a catalyst by raising the temperature in an air atmosphere to 550° C. and maintaining it in a hydrogen atmosphere for 1 hour.
- the distribution of the metal active material confirmed through EPMA is shown in FIG. 2, and in the case of Example 1, platinum is not distributed from the surface to about 100 ⁇ m, but it can be observed that platinum has a certain thickness of 300 ⁇ m from 100 ⁇ m, tin In the case of , it was confirmed that it has an egg-shell distribution with a certain thickness from the surface differently. In the case of the comparative example, platinum and tin were uniformly distributed from the surface to the inside. Depending on the reactant and concentration, the platinum component may have a thickness of 200 to 500 ⁇ m, and may exist in the form of a ring at a depth of 30 to 200 ⁇ m from the surface of the carrier.
- the catalyst according to the present invention was charged in a fixed bed catalytic reactor to carry out propane dehydrogenation reaction.
- the composition of the reaction gas in the reactor has a volume ratio of hydrogenated propane of 0.61, and 95 ppm of the total gas is composed of H 2 S gas to prevent corrosion of the SUS reactor.
- propane dehydrogenation reaction proceeds while adding propane and hydrogen in the above constant ratio.
- the conversion rate and selectivity are calculated by analyzing the gas produced using gas chromatography.
- Table 1 summarizes the initial analysis results of the propane dehydrogenation reaction and the analysis results after the reaction for 12 hours.
- the initial conversion rates of the catalysts of Examples and Comparative Examples were 36.5 and 36.2, respectively, at the same level, but after 12 hours, the gap widened to 35.1 and 34.5, respectively.
- the initial values were 88.9% and 89.2%, respectively, at the same level, and similar differences were observed even after 12 hours of reaction.
- the propylene yield decreased significantly after reaction for 12 hours, which is thought to be because coke is deposited on the platinum distributed from the surface to block the active point and prevent the reaction gas from reaching the inside.
- 3 is a graph showing a change in conversion rate over time, and it can be seen that a high conversion rate is maintained until 12 hours have elapsed while achieving a high conversion rate by the catalyst of the example.
Abstract
Description
Claims (4)
- 경질탄화수소의 탈수소화 촉매반응에 사용되는 주석 및 칼륨 성분을 포함하는 구형의 백금 촉매로서, 촉매 표면에는 백금 성분이 존재하지 않고 촉매 표면으로부터 일정 깊이에 일정 두께의 고리 형태로 백금 성분이 존재하는 링 타입 금속분포를 가지는 탈수소화 촉매.
- 제1항에 있어서, 상기 주석 성분은 촉매 표면에서 일정 깊이까지만 에그-쉘 형태로 존재하는, 탈수소화 촉매.
- 제2항에 있어서, 칼륨 성분은 촉매 전반에 걸쳐 균일하게 분포되는, 탈수소화 촉매.
- 제1항 내지 제3항 중 어느 하나의 항에 있어서, 상기 일정 깊이는 30~200um이고, 상기 일정 두께는 200~500um인, 탈수소화 촉매.
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ES202390036A ES2957057A2 (es) | 2020-12-04 | 2021-11-18 | Catalizador de deshidrogenación que tiene una distribución de metal de tipo anillo |
CN202180081470.3A CN116583349A (zh) | 2020-12-04 | 2021-11-18 | 具有环状金属分布的脱氢催化剂 |
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KR1020200168050A KR102464144B1 (ko) | 2020-12-04 | 2020-12-04 | 링 타입 금속분포를 가지는 탈수소화 촉매 |
KR10-2020-0168050 | 2020-12-04 |
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CN (1) | CN116583349A (ko) |
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KR102126608B1 (ko) * | 2017-07-28 | 2020-06-24 | 건국대학교 글로컬산학협력단 | 심장기능 표지자간 알고리즘 분석을 통한 약물의 심장 독성 평가법 |
KR102175701B1 (ko) * | 2018-10-19 | 2020-11-06 | 희성촉매 주식회사 | 고효율의 분지형 경질탄화수소류 탈수소화 촉매 제조방법 |
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KR102464144B1 (ko) | 2022-11-04 |
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