Deep hydrogenation catalyst for polycyclic aromatic hydrocarbon and preparation method of deep hydrogenation catalyst

Abstract

The invention provides a polycyclic aromatic hydrocarbon deep hydrogenation catalyst and a preparation method thereof. The polycyclic aromatic hydrocarbon deep hydrogenation catalyst is a skeleton nickel alloy catalyst. The deep hydrogenation catalyst for the polycyclic aromatic hydrocarbon comprises the following components: Ni, Al, Mo, Fe and Co. The deep hydrogenation catalyst for the polycyclic aromatic hydrocarbon is high in activity, relatively mild in reaction process conditions, relatively low in required reaction temperature and reaction pressure, more thorough in hydrogenation and low in unsaturated hydride content in a hydrogenation product. For hydrogenation of polycyclic aromatic hydrocarbon phenanthrene with the highest hydrogenation difficulty in the embodiment of the invention, under the conditions that the reaction temperature is 210 DEG C and the reaction pressure is 2.0 Mpa, the hydrogenation conversion rate is greater than or equal to 99.95%, and the content of unsaturated hydrophenanthrene in the product is lower than 0.1%; however, in the prior art, under the harsh conditions that the reaction temperature is 260 DEG C and the reaction pressure is 4 MPa, the product still contains about 0.51% of unsaturated hydrophenanthrene.

Description

Technical Field

[0001] The invention belongs to the technical field of catalyst formulation and preparation, relates to condensed ring aromatic hydrocarbons, and specifically relates to a condensed ring aromatic hydrocarbon deep hydrogenation catalyst and a preparation method thereof. Background Art

[0002] Polycyclic aromatic hydrocarbons are an important component of coal tar and an important type of basic chemical raw material. The preparation of deep hydrogenated products through catalytic hydrogenation and saturation can not only obtain high-value-added chemical raw materials or aviation fuels, but also avoid the emission of highly carcinogenic substances in polycyclic aromatic hydrocarbons, reduce ecological environmental pollution and biological toxicity. Polycyclic aromatic hydrocarbons are superior to those containing more than two benzene rings. They have a very stable structure and strong chemical inertness, but are difficult to deeply hydrogenate. A large number of studies have shown that the depth of hydrogenation of polycyclic aromatic hydrocarbons is particularly critical to product quality, especially the performance of aviation fuel. The unsaturated products in the hydrogenation products will affect the long-term storage and anti-coking performance of the fuel to a certain extent. Therefore, deep hydrogenation should be achieved as much as possible, and efficient catalysts are the key core technology to achieve deep hydrogenation of polycyclic aromatic hydrocarbons.

[0003] The Chinese patent with application number CN202110545714.0 "A method for preparing a hollow molecular sieve catalyst and its use in preparing high-density aviation fuel by hydrogenating condensed aromatics" reports a condensed aromatic hydrogenation hollow molecular sieve catalyst Pd / ZSM-5. However, the catalyst has low activity (requires higher reaction temperature and reaction pressure) and insufficient deep hydrogenation capacity. For example, for the hydrogenation of condensed aromatic phenanthrene, which is the most difficult to hydrogenate, under the harsh conditions of reaction temperature of up to 260°C and reaction pressure of up to 4MPa, there is still about 0.51% of unsaturated hydrogenated phenanthrene in the product. In addition, the catalyst is a precious metal Pt catalyst, which is costly and limited in large-scale industrial applications. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a condensed-ring aromatic hydrocarbon deep hydrogenation catalyst and a preparation method thereof, so as to solve the technical problem of harsh reaction conditions of the condensed-ring aromatic hydrocarbon deep hydrogenation catalyst in the prior art.

[0005] Another object of the present invention is to provide a catalyst for deep hydrogenation of condensed ring aromatics and a method for preparing the same, so as to solve the technical problem in the prior art that the hydrogenation capacity of deep hydrogenation of condensed ring aromatics needs to be further improved.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve the above problems:

[0007] A condensed-ring aromatic hydrocarbon deep hydrogenation catalyst, wherein the condensed-ring aromatic hydrocarbon deep hydrogenation catalyst is a skeletal nickel alloy catalyst.

[0008] The components of the condensed ring aromatic hydrocarbon deep hydrogenation catalyst include Ni, Al, Mo, Fe and Co.

[0009] The present invention also has the following technical features:

[0010] The condensed aromatic hydrocarbon deep hydrogenation catalyst is made of the following components by weight: Ni is 90-95%, Al is 2-3%, Mo is 1-2%, Fe is 1-2%, Co is 1-3%, and the sum of the weight of each component is 100%.

[0011] The condensed ring aromatic hydrocarbon deep hydrogenation catalyst is made of the following components in parts by weight: 93% Ni, 2% Al, 1.5% Mo, 2% Fe and 1.5% Co.

[0012] The present invention also protects a method for preparing the above-mentioned condensed ring aromatic hydrocarbon deep hydrogenation catalyst, which comprises the following steps:

[0013] Step 1: Ni, Al, Mo, Fe and Co are placed in a graphite crucible, heated to a molten state, stirred evenly with a graphite rod, and smelted at 1100-1600° C. for 1-2 hours. Then, they are poured into a high-temperature alloy steel plate and naturally cooled. Then, they are crushed with a metal crusher and sieved with 60-100 meshes to obtain alloy powder.

[0014] Step 2: Add the alloy powder obtained in step 1 to the alkaline solution, keep stirring and activating at room temperature for 1 to 2 hours, and then keep it at 60 to 80° C. for 2 to 3 hours to obtain the initial product of the skeleton nickel alloy catalyst.

[0015] Step 3: Wash the initial product of the skeletal nickel alloy catalyst obtained in step 2 with deionized water for 3 to 5 times to obtain a skeletal nickel alloy catalyst, and store it in a 0.1 mol / L sodium hydroxide aqueous solution for later use.

[0016] Specifically, in step 2, the alkaline solution includes one or more of a sodium hydroxide solution with a concentration of 10 to 25 wt.% and an ammonia solution with a concentration of 10 to 25 wt.%.

[0017] Preferably, when the alkaline solution is a mixed alkaline solution of 10-25wt% sodium hydroxide alkali solution and 10-25wt% ammonia water, the mass ratio of 10-25wt% sodium hydroxide alkali solution to 10-25wt% ammonia water is 1:1.

[0018] Compared with the prior art, the present invention has the following technical effects:

[0019] (I) The catalyst for deep hydrogenation of condensed aromatic hydrocarbons of the present invention has high activity, relatively mild reaction process conditions, low required reaction temperature and reaction pressure, more thorough hydrogenation, and low content of unsaturated hydrogenated compounds in the hydrogenated product. For example, for the hydrogenation of condensed aromatic hydrocarbon phenanthrene, which is the most difficult to hydrogenate in the embodiments of the present invention, under the conditions of reaction temperature of 210°C and reaction pressure of 2.0Mpa, the hydrogenation conversion rate is greater than or equal to 99.95%, and the content of unsaturated hydrogenated phenanthrene in the product is less than 0.1%; while in the prior art, under the harsh conditions of reaction temperature of 260°C and reaction pressure of 4MPa, there is still about 0.51% of unsaturated hydrogenated phenanthrene in the product.

[0020] (II) The catalyst in the present invention is a non-precious metal skeleton nickel alloy catalyst, while the catalyst used in the prior art is a precious metal Pt catalyst, which is high in cost and limited in large-scale industrial application.

[0021] (III) The catalyst of the present invention utilizes the synergistic effect of multiple non-precious metals such as Ni, Al, Mo, Fe and Co and the high specific surface area and porous characteristics of skeleton nickel, thereby comprehensively improving the activity of the catalyst and achieving deep hydrogenation of a series of condensed-ring aromatic hydrocarbons. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The product of the deep hydrogenation of the condensed aromatic hydrocarbon phenanthrene in Example 10 13 C NMR spectrum.

[0023] Figure 2 This is the infrared spectrum of the product after deep hydrogenation of the condensed ring aromatic hydrocarbon phenanthrene in Example 10.

[0024] Figure 3 The product of the deep hydrogenation of the condensed aromatic anthracene in Example 11 13 C NMR spectrum.

[0025] Figure 4 This is the infrared spectrum of the product after deep hydrogenation of the condensed ring aromatic hydrocarbon anthracene in Example 11.

[0026] Figure 5 The product of the deep hydrogenation of the condensed aromatic hydrocarbon acenaphthene in Example 12 13 C NMR spectrum.

[0027] Figure 6 The product of the deep hydrogenation of the condensed aromatic hydrocarbon fluorene in Example 13 13 C NMR spectrum.

[0028] Figure 7 The product of the deep hydrogenation of the condensed aromatic hydrocarbon fluorene in Example 13 1 H NMR spectrum.

[0029] Figure 8This is the infrared spectrum of the product after deep hydrogenation of the condensed ring aromatic hydrocarbon fluorene in Example 13.

[0030] The specific contents of the present invention are further explained in detail below in conjunction with embodiments. DETAILED DESCRIPTION

[0031] It should be noted that the raw materials and instruments used in the present invention, unless otherwise specified, are all raw materials and instruments known in the prior art. For example, Ni uses known Ni, and a metal crusher uses a known metal crusher.

[0032] In the present invention, the condensed aromatic hydrocarbon is one or more of condensed aromatic hydrocarbon phenanthrene, condensed aromatic hydrocarbon anthracene, condensed aromatic hydrocarbon acenaphthene, condensed aromatic hydrocarbon fluorene, condensed aromatic hydrocarbon acenaphthylene and alkyl substituted products thereof.

[0033] In the present invention, room temperature refers to the natural environment temperature during the production process, and usually, the temperature is generally within the range of 20±10°C.

[0034] In accordance with the above technical scheme, specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical scheme of this application fall within the protection scope of the present invention.

[0035] Embodiment 1:

[0036] This embodiment provides a condensed-ring aromatic hydrocarbon deep hydrogenation catalyst, and the condensed-ring aromatic hydrocarbon deep hydrogenation catalyst is a skeletal nickel alloy catalyst.

[0037] The components of the condensed ring aromatic hydrocarbon deep hydrogenation catalyst include Ni, Al, Mo, Fe and Co.

[0038] The catalyst for deep hydrogenation of condensed aromatic hydrocarbons is made of the following components by weight: 93% Ni, 2% Al, 1.5% Mo, 2% Fe and 1.5% Co.

[0039] The preparation method of the condensed aromatic hydrocarbon deep hydrogenation catalyst in this embodiment comprises the following steps:

[0040] Step 1: 93gNi, 2gAl, 1.5gMo, 2gFe and 1.5gCo are placed in a graphite crucible, heated to a molten state, stirred evenly with a graphite rod, and smelted at 1300°C for 2h. Then, they are poured into a high-temperature alloy steel plate and naturally cooled. Then, they are crushed with a metal crusher and sieved through 80 mesh to obtain alloy powder.

[0041] Step 2: Add the alloy powder obtained in step 1 to the alkaline solution, keep stirring and activating at room temperature for 1.5 hours, and then keep it at 70° C. for 2 hours to obtain the initial product of the skeleton nickel alloy catalyst RA.

[0042] In this embodiment, the alkaline solution is a mixed alkaline solution of 15wt% sodium hydroxide alkali solution and 20wt% ammonia water, and the mass ratio of 15wt% sodium hydroxide alkali solution to 20wt% ammonia water is 1:1.

[0043] Step 3: Wash the initial product of the skeletal nickel alloy catalyst RA obtained in step 2 with deionized water for 5 times to obtain the skeletal nickel alloy catalyst RA, and store it in a 0.1 mol / L sodium hydroxide aqueous solution for later use.

[0044] According to the test, the main active component nickel content of the skeleton nickel alloy catalyst RA is 93.7%, and the specific surface area is 225m 2 / g, and the stacking is 2.4g / cm 3 , median particle size d 50 is 24μm.

[0045] Embodiment 2:

[0046] This embodiment provides a condensed aromatic hydrocarbon deep hydrogenation catalyst, namely, a skeletal nickel alloy catalyst RB. The preparation method of the skeletal nickel alloy catalyst RB in this embodiment is basically the same as that in Example 1, except that in step 2, the alkaline solution is a sodium hydroxide solution with a concentration of 15wt.%, and the mass of the alkaline solution is equal to the mass of the mixed alkaline solution in Example 1.

[0047] According to the test, the main active component nickel content of the skeleton nickel alloy catalyst RB is 91.5%, and the specific surface area is 210m 2 / g, and the stacking is 2.1g / cm 3 , median particle size d 50 is 32μm.

[0048] Embodiment 3:

[0049] This embodiment provides a condensed aromatic hydrocarbon deep hydrogenation catalyst, namely, a skeletal nickel alloy catalyst RC. The preparation method of the skeletal nickel alloy catalyst RC in this embodiment is basically the same as that in Example 1, except that in step 2, the alkaline solution is 20wt.% ammonia water, and the mass of the alkaline solution is equal to the mass of the mixed alkaline solution in Example 1.

[0050] According to the test, the main active component nickel content of the skeleton nickel alloy catalyst RC is 91.2%, and the specific surface area is 208m 2 / g, and the stacking is 2.1g / cm 3 , median particle size d 50 is 35μm.

[0051] Embodiment 4:

[0052] This example provides a method for preparing high-energy fuel by solvent-free deep hydrogenation of condensed aromatic hydrocarbons. The catalyst used in this example is the skeletal nickel alloy catalyst RA in Example 1, and the condensed aromatic hydrocarbon is condensed aromatic hydrocarbon phenanthrene.

[0053] Step 1: Melting of polycyclic aromatic hydrocarbons:

[0054] 250 g of polycyclic aromatic hydrocarbon phenanthrene was sucked into the raw material preheating kettle by negative pressure, and the heat transfer oil was turned on for heating to make the polycyclic aromatic hydrocarbon phenanthrene in a melted and flowable state.

[0055] In this embodiment, the temperature in the raw material preheating kettle is controlled to be 100°C.

[0056] Step 2: Mixing of condensed ring aromatics and skeleton nickel alloy catalyst:

[0057] 10 g of skeleton nickel alloy catalyst RA was sucked into a 500 mL high-pressure stirred reactor by negative pressure, and the valve between the raw material preheating kettle and the high-pressure stirred reactor was opened to allow the melted polycyclic aromatic hydrocarbon phenanthrene to flow naturally into the high-pressure stirred reactor by gravity.

[0058] Step 3: Deep hydrogenation of condensed ring aromatics:

[0059] 0.5MPa hydrogen is introduced to replace the gas in the high-pressure stirred reactor three times, and then hydrogen is introduced to control the pressure in the high-pressure stirred reactor to 2.0MPa, and the temperature is raised under stirring for heating reaction. After the reaction is completed, water is passed to cool down, and after the temperature drops to 25°C, the pressure is released to a slightly positive pressure, and nitrogen is introduced. The hydrogenated reaction fluid is pressed into the filter to obtain a filtrate, and the filtrate is collected in a material tank. The filter cake is back-blown into the high-pressure stirred reactor with nitrogen, and recycled to finally obtain a high-energy fuel.

[0060] In this embodiment, the stirring paddle used in the stirring state is a three-layer inclined blade type, and each layer of stirring blades is provided with 20 circular holes with a diameter of 2 mm.

[0061] In this embodiment, the reaction temperature of the heating reaction is 210° C., and the reaction time of the heating reaction is 4 hours.

[0062] In this embodiment, the skeleton nickel alloy catalyst RA can be recycled for 9 times.

[0063] The filtrate collected in the material tank was analyzed by gas chromatography, and the hydrogenation conversion rate of the polycyclic aromatic hydrocarbon phenanthrene was measured to be 99.96%, and the content of unsaturated hydrogenated phenanthrene in the product was less than 0.08%.

[0064] Embodiment 5:

[0065] This embodiment provides a method for preparing high-energy fuel by solvent-free deep hydrogenation of condensed aromatic hydrocarbons. The method for preparing high-energy fuel by solvent-free deep hydrogenation of condensed aromatic hydrocarbons in this embodiment is basically the same as the method in Example 4, with the only difference being that the catalyst used in this embodiment is the skeletal nickel alloy catalyst RB in Example 2.

[0066] The filtrate collected in the material tank was analyzed by gas chromatography, and the hydrogenation conversion rate of the polycyclic aromatic hydrocarbon phenanthrene was measured to be 99.16%, and the content of unsaturated hydrogenated phenanthrene in the product was less than 0.49%.

[0067] Embodiment 6:

[0068] This embodiment provides a method for preparing high-energy fuel by solvent-free deep hydrogenation of condensed aromatic hydrocarbons. The method for preparing high-energy fuel by solvent-free deep hydrogenation of condensed aromatic hydrocarbons in this embodiment is basically the same as the method in Example 4, with the only difference being that the catalyst used in this embodiment is the skeletal nickel alloy catalyst RC in Example 3.

[0069] The filtrate collected in the material tank was analyzed by gas chromatography, and the hydrogenation conversion rate of the polycyclic aromatic hydrocarbon phenanthrene was measured to be 99.11%, and the content of unsaturated hydrogenated phenanthrene in the product was less than 0.52%.

[0070] Embodiment 7:

[0071] This embodiment provides a method for preparing high-energy fuel by solvent-free deep hydrogenation of condensed aromatic hydrocarbons. The method for preparing high-energy fuel by solvent-free deep hydrogenation of condensed aromatic hydrocarbons in this embodiment is basically the same as the method in Example 4, with the only difference being that: the pressure in the high-pressure stirred reactor in this embodiment is 2.5 MPa; the reaction temperature of the heating reaction is 220°C, and the reaction time of the heating reaction is 3 hours.

[0072] The filtrate collected in the material tank was analyzed by gas chromatography, and the hydrogenation conversion rate of the polycyclic aromatic hydrocarbon phenanthrene was measured to be 99.98%, and the content of unsaturated hydrogenated phenanthrene in the product was less than 0.05%.

[0073] Embodiment 8:

[0074] This embodiment provides a method for preparing high-energy fuel by solvent-free deep hydrogenation of condensed aromatic hydrocarbons. The method for preparing high-energy fuel by solvent-free deep hydrogenation of condensed aromatic hydrocarbons in this embodiment is basically the same as the method in Example 7, with the only difference being that the catalyst used in this embodiment is the skeletal nickel alloy catalyst RB in Example 2.

[0075] The filtrate collected in the material tank was analyzed by gas chromatography, and the hydrogenation conversion rate of the polycyclic aromatic hydrocarbon phenanthrene was measured to be 99.19%, and the content of unsaturated hydrogenated phenanthrene in the product was less than 0.43%.

[0076] Embodiment 9:

[0077] This embodiment provides a method for preparing high-energy fuel by solvent-free deep hydrogenation of condensed aromatic hydrocarbons. The method for preparing high-energy fuel by solvent-free deep hydrogenation of condensed aromatic hydrocarbons in this embodiment is basically the same as the method in Example 7, with the only difference being that the catalyst used in this embodiment is the skeletal nickel alloy catalyst RC in Example 3.

[0078] The filtrate collected in the material tank was analyzed by gas chromatography, and the hydrogenation conversion rate of the polycyclic aromatic hydrocarbon phenanthrene was measured to be 99.12%, and the content of unsaturated hydrogenated phenanthrene in the product was less than 0.47%.

[0079] Embodiment 10:

[0080] This embodiment provides a method for preparing high-energy fuel by solvent-free deep hydrogenation of condensed aromatic hydrocarbons. The method for preparing high-energy fuel by solvent-free deep hydrogenation of condensed aromatic hydrocarbons in this embodiment is basically the same as the method in Example 4, with the only difference being that: in this embodiment, the reaction time of the heating reaction is 3 hours; after the temperature drops to 50°C, the pressure is released to a slightly positive pressure.

[0081] The filtrate collected in the material tank was analyzed by gas chromatography, and the hydrogenation conversion rate of the polycyclic aromatic hydrocarbon phenanthrene was measured to be 99.95%, the content of unsaturated hydrogenated phenanthrene in the product was less than 0.1%, and the skeleton nickel alloy catalyst RA could be recycled for 9 times.

[0082] The product of the deep hydrogenation of the polycyclic aromatic hydrocarbon phenanthrene in this embodiment was analyzed, and the measured 13 C NMR results are as follows Figure 1 As shown; the product of the deep hydrogenation of the polycyclic aromatic hydrocarbon phenanthrene in this embodiment was analyzed, and the infrared results measured were as follows Figure 2 As shown; from the results, it can be seen that the product after deep hydrogenation is the target high-energy fuel.

[0083] Embodiment 11:

[0084] This embodiment provides a method for preparing high-energy fuel by solvent-free deep hydrogenation of condensed aromatic hydrocarbons. The method for preparing high-energy fuel by solvent-free deep hydrogenation of condensed aromatic hydrocarbons in this embodiment is basically the same as the method in Example 10, with the only difference that: in this embodiment, the condensed aromatic hydrocarbon is condensed aromatic hydrocarbon anthracene; the temperature in the raw material preheating kettle is controlled to be 210°C; the pressure in the high-pressure stirred reactor is 2.5MPa; the reaction temperature of the heating reaction is 220°C, and the reaction time of the heating reaction is 4h.

[0085] The filtrate collected in the material tank was analyzed by gas chromatography, and the hydrogenation conversion rate of the polycyclic aromatic hydrocarbon anthracene was measured to be 99.9%, the content of unsaturated hydrogenated anthracene in the product was less than 0.1%, and the skeleton nickel alloy catalyst RA could be recycled for 8 times.

[0086] The product of deep hydrogenation of polycyclic aromatic hydrocarbon anthracene in this embodiment was analyzed, and the measured 13 C NMR results are as follows Figure 3 As shown; the product of the deep hydrogenation of the polycyclic aromatic hydrocarbon anthracene in this embodiment was analyzed, and the infrared results measured were as follows Figure 4 As shown; from the results, it can be seen that the product after deep hydrogenation is the target high-energy fuel.

[0087] Embodiment 12:

[0088] This embodiment provides a method for preparing high-energy fuel by solvent-free deep hydrogenation of condensed aromatic hydrocarbons. The method for preparing high-energy fuel by solvent-free deep hydrogenation of condensed aromatic hydrocarbons in this embodiment is basically the same as the method in Example 10, with the only difference being that: in this embodiment, the condensed aromatic hydrocarbon is condensed aromatic hydrocarbon acenaphthene; the temperature in the raw material preheating kettle is controlled to be 90°C; and the reaction temperature of the heating reaction is 190°C.

[0089] The filtrate collected in the material tank was analyzed by gas chromatography, and the hydrogenation conversion rate of the polycyclic aromatic hydrocarbon acenaphthene was measured to be 99.99%, the content of unsaturated hydrogenated acenaphthene in the product was less than 0.03%, and the skeleton nickel alloy catalyst RA could be recycled for 9 times.

[0090] The product of deep hydrogenation of acenaphthene in this embodiment was analyzed, and the measured 13 C NMR results are as follows Figure 5 As shown; from the results, it can be seen that the product after deep hydrogenation is the target high-energy fuel.

[0091] Embodiment 13:

[0092] This embodiment provides a method for preparing high-energy fuel by solvent-free deep hydrogenation of condensed aromatic hydrocarbons. The method for preparing high-energy fuel by solvent-free deep hydrogenation of condensed aromatic hydrocarbons in this embodiment is basically the same as the method in Example 10, with the only difference being: in this embodiment, the condensed aromatic hydrocarbon is condensed aromatic hydrocarbon fluorene; the temperature in the raw material preheating kettle is controlled to be 110°C; the pressure in the high-pressure stirred reactor is 1.5MPa; and the reaction temperature of the heating reaction is 150°C.

[0093] The filtrate collected in the material tank was analyzed by gas chromatography, and the hydrogenation conversion rate of the polycyclic aromatic hydrocarbon fluorene was measured to be 99.99%, the content of unsaturated hydrogenated fluorene in the product was less than 0.03%, and the skeleton nickel alloy catalyst RA could be recycled for 9 times.

[0094] The product of the deep hydrogenation of the polycyclic aromatic hydrocarbon fluorene in this embodiment was analyzed, and the measured 13 C NMR results are as follows Figure 6 As shown; the product of the deep hydrogenation of the polycyclic aromatic hydrocarbon fluorene in this embodiment was analyzed, and the measured 1 H NMR results are as follows Figure 7As shown; the product of the deep hydrogenation of the polycyclic aromatic hydrocarbon fluorene in this embodiment was analyzed, and the infrared results measured were as follows Figure 8 As shown; from the results, it can be seen that the product after deep hydrogenation is the target high-energy fuel.

Claims

1. A catalyst for deep hydrogenation of condensed ring aromatics, characterized in that: The condensed ring aromatic hydrocarbon deep hydrogenation catalyst is a skeletal nickel alloy catalyst; The components of the condensed ring aromatic hydrocarbon deep hydrogenation catalyst include Ni, Al, Mo, Fe and Co.

2. The condensed ring aromatic hydrocarbon deep hydrogenation catalyst according to claim 1, characterized in that The condensed aromatic hydrocarbon deep hydrogenation catalyst is made of the following components by weight: Ni is 90-95%, Al is 2-3%, Mo is 1-2%, Fe is 1-2%, Co is 1-3%, and the sum of the weight of each component is 100%.

3. The condensed ring aromatic hydrocarbon deep hydrogenation catalyst as claimed in claim 2, characterized in that The condensed ring aromatic hydrocarbon deep hydrogenation catalyst is made of the following components in parts by weight: 93% Ni, 2% Al, 1.5% Mo, 2% Fe and 1.5% Co.

4. A method for preparing a condensed aromatic hydrocarbon deep hydrogenation catalyst according to any one of claims 1 to 3, characterized in that: The method comprises the following steps: Step 1: Ni, Al, Mo, Fe and Co are placed in a graphite crucible, heated to a molten state, stirred evenly with a graphite rod, and smelted at 1100-1600° C. for 1-2 hours, poured into a high-temperature alloy steel plate, cooled naturally, crushed with a metal crusher, and sieved with 60-100 meshes to obtain alloy powder; Step 2, adding the alloy powder obtained in step 1 to an alkaline solution, stirring and activating at room temperature for 1 to 2 hours, and then keeping the temperature at 60 to 80° C. for 2 to 3 hours to obtain a primary product of a skeleton nickel alloy catalyst; Step 3: Wash the initial product of the skeletal nickel alloy catalyst obtained in step 2 with deionized water for 3 to 5 times to obtain a skeletal nickel alloy catalyst, and store it in a 0.1 mol / L sodium hydroxide aqueous solution for later use.

5. The method for preparing a condensed-ring aromatic hydrocarbon deep hydrogenation catalyst according to claim 4, characterized in that: In step 2, the alkaline solution includes one or more of a sodium hydroxide solution with a concentration of 10 to 25 wt.% and an ammonia solution with a concentration of 10 to 25 wt.%.

6. The method for preparing a condensed-ring aromatic hydrocarbon deep hydrogenation catalyst according to claim 5, characterized in that: When the alkaline solution is a mixed alkaline solution of 10-25wt% sodium hydroxide alkali solution and 10-25wt% ammonia water, the mass ratio of 10-25wt% sodium hydroxide alkali solution to 10-25wt% ammonia water is 1:1.

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