Hydrogenation catalyst for organic liquid hydrogen storage and preparation process

Abstract

The present invention discloses a hydrogenation catalyst for organic liquid hydrogen storage and a preparation process thereof, and relates to the technical field of hydrogenation catalysts, the hydrogenation catalyst comprises an alumina carrier cage, a nickel skeleton is arranged in the alumina carrier cage, a metal ball is arranged in the nickel skeleton, and the mass ratio of the alumina carrier cage to the nickel skeleton to the metal ball is 3: 2: 5. The preparation method has the advantages that the double-layer polyhedral structure carrier is nested to stabilize the metal catalyst, and the inner layer of the double-layer polyhedral structure is also prepared from the metal catalyst, so that the catalytic performance of the metal catalyst is ensured, the stability of the metal catalyst structure can be enhanced, and the service life of the metal catalyst is prolonged. And meanwhile, the double-layer nested structure can effectively improve the overall structural strength of the metal catalytic object, so that the metal catalytic object is convenient to use repeatedly, the metal catalytic object is not easy to disintegrate, the catalytic object is convenient to recycle and reuse, and resource saving is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogenation catalysts, and in particular to a hydrogenation catalyst for storing hydrogen in an organic liquid and a preparation process thereof. Background Art

[0002] Hydrogen storage technology has always been a bottleneck in the development of hydrogen energy applications. The commercially available hydrogen storage methods at this stage mainly include high-pressure gaseous hydrogen storage and low-temperature liquefied hydrogen storage. Both of these hydrogen storage methods have obvious disadvantages: the storage equipment is expensive, the use environment and conditions are harsh, there is a lot of hydrogen loss during use, the safety factor is low, the risk of accidents is high, the infrastructure construction for large-scale promotion is expensive, and distribution and transportation are difficult.

[0003] In this context, organic liquid hydrogen storage technology has been proposed as a new type of hydrogen storage technology. It achieves hydrogen storage through the reversible addition and dehydrogenation reaction of organic liquid hydrogen storage carriers containing unsaturated bonds and hydrogen. It can use the existing infrastructure for the transportation and use of fossil fuels. It is easy to store, safe to use, and has low supply chain construction costs.

[0004] In organic liquid hydrogen storage technology, a hydrogenation catalyst is required for hydrogenation. However, the existing hydrogenation catalyst is easy to decompose after use, which makes it difficult to recycle and reuse, and easily leads to waste of resources.

[0005] In view of the above problems, a hydrogenation catalyst and a preparation process for hydrogen storage in organic liquid are proposed. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] In view of the deficiencies in the prior art, the present invention provides a hydrogenation catalyst for organic liquid hydrogen storage and a preparation process, which has the advantages of stable structure and is conducive to repeated use, and solves the problem of easy decomposition and difficulty in recycling.

[0008] (II) Technical solution

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a hydrogenation catalyst for hydrogen storage in an organic liquid, comprising an alumina carrier cage, a nickel skeleton is arranged inside the alumina carrier cage, metal balls are arranged inside the nickel skeleton, the mass ratio of the alumina carrier cage, the nickel skeleton and the metal balls is 3:2:5, connecting contacts are arranged between the alumina carrier cage and the nickel skeleton, supporting contacts are arranged between the nickel skeleton and the metal balls, and a plurality of through holes are opened inside the metal balls.

[0010] Preferably, the alumina carrier cage and the nickel skeleton are both configured as polyhedral structures, the alumina carrier cage and the nickel skeleton are cross-distributed, and the alumina carrier cage and the nickel skeleton are connected and fixed via connection contacts.

[0011] Preferably, the metal ball and the nickel skeleton are clamped by a supporting contact, the metal ball and the supporting contact are in contact with each other, and the metal ball is limited by the supporting contact.

[0012] Preferably, the metal ball is a sphere condensed from a mixture of metal platinum and metal palladium, and the mass ratio of the metal platinum to the metal palladium is 4:5.

[0013] Preferably, the metal ball is a sphere condensed from a mixture of metal cobalt and metal molybdenum, and the mass ratio of the metal cobalt to the metal molybdenum is 1:1.5.

[0014] Specifically, at least one metal is selected from platinum, palladium, cobalt and molybdenum as a raw material and melted to make spheres. It can be a single metal or a mixture of two, three or four metals, wherein the mass ratio of the mixture of the two metals can be 1:1.2-1.5.

[0015] A process for preparing a hydrogenation catalyst for hydrogen storage in an organic liquid comprises the following steps:

[0016] 1) Prepare raw materials, including aluminum oxide, nickel metal, platinum metal, palladium metal, cobalt metal and molybdenum metal;

[0017] 2) Alumina and nickel metal are melted at high temperature and poured into a mold to solidify into a polyhedral structure, and at the same time, at least one metal selected from platinum metal, palladium metal, cobalt metal and molybdenum metal is melted, mixed and poured into a spherical mold to solidify into a spherical structure;

[0018] 3) After the solidified nickel metal is nested inside the alumina carrier, the nickel metal is poured between the nickel metal skeleton and the alumina carrier to form a connection point and then cooled;

[0019] 4) The cooled metal sphere is embedded in a metal nickel skeleton, and then metal nickel is poured inside the metal nickel skeleton to form a limiting contact, and the metal sphere is cooled again to complete the preparation of the metal catalyst.

[0020] (III) Beneficial effects

[0021] Compared with the prior art, the present invention provides a hydrogenation catalyst and preparation process for organic liquid hydrogen storage, which has the following beneficial effects:

[0022] The hydrogenation catalyst and preparation process for hydrogen storage in organic liquids are provided with a double-layer polyhedral structure carrier for nesting to achieve stability of the metal catalyst, and the inner layer of the double-layer polyhedral structure is also prepared with the metal catalyst, which ensures the catalytic performance of the metal catalyst and enhances the stability of the metal catalyst structure, thereby preventing the internal metal catalyst from losing its catalytic performance. At the same time, the double-layer nested structure can effectively increase the overall structural strength of the metal catalyst, facilitates repeated use of the metal catalyst, makes the metal catalyst less likely to disintegrate, is conducive to maintaining the stability of the catalyst itself, facilitates the recovery and reuse of the catalyst, and is conducive to resource conservation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the structure proposed by the present invention;

[0024] Figure 2 This is a schematic diagram of the local structure proposed by the present invention.

[0025] In the figure: 1-alumina carrier cage, 2-nickel skeleton, 3-metal ball, 4-connecting contact, 5-supporting contact, 6-through hole. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-2 A hydrogenation catalyst for hydrogen storage in an organic liquid comprises an alumina carrier cage 1, a nickel skeleton 2 is arranged inside the alumina carrier cage 1, a metal ball 3 is arranged inside the nickel skeleton 2, a mass ratio of the alumina carrier cage 1, the nickel skeleton 2 and the metal ball 3 is 3:2:5, a connecting contact 4 is arranged between the alumina carrier cage 1 and the nickel skeleton 2, a supporting contact 5 is arranged between the nickel skeleton 2 and the metal ball 3, and a plurality of through holes 6 are opened inside the metal ball 5.

[0028] The alumina carrier cage 1 and the nickel skeleton 2 are both configured as polyhedral structures, the alumina carrier cage 1 and the nickel skeleton 2 are cross-distributed, and the alumina carrier cage 1 and the nickel skeleton 2 are connected and fixed via connection contacts 4 .

[0029] The metal ball 3 and the nickel skeleton 2 are clamped together by the supporting contact 5 , the metal ball 3 and the supporting contact 5 are fitted together, and the metal ball 3 is limited by the supporting contact 5 .

[0030] The metal ball 3 is a sphere condensed from a mixture of metal platinum and metal palladium, and the mass ratio of metal platinum to metal palladium is 4:5. The metal ball 3 is a sphere condensed from a mixture of metal cobalt and metal molybdenum, and the mass ratio of metal cobalt to metal molybdenum is 1:1.5.

[0031] Specifically, at least one metal is selected from platinum, palladium, cobalt and molybdenum as a raw material and melted to make spheres. It can be a single metal or a mixture of two, three or four metals, wherein the mass ratio of the mixture of the two metals can be 1:1.2-1.5.

[0032] A process for preparing a hydrogenation catalyst for hydrogen storage in an organic liquid comprises the following steps:

[0033] 1) Prepare raw materials, including aluminum oxide, nickel metal, platinum metal, palladium metal, cobalt metal and molybdenum metal;

[0034] 2) Alumina and nickel metal are melted at high temperature and poured into a mold to solidify into a polyhedral structure, and at the same time, at least one metal selected from platinum metal, palladium metal, cobalt metal and molybdenum metal is melted, mixed and poured into a spherical mold to solidify into a spherical structure;

[0035] 3) After the solidified nickel metal is nested inside the alumina carrier, the nickel metal is poured between the nickel metal skeleton and the alumina carrier to form a connection point and then cooled;

[0036] 4) The cooled metal sphere is embedded in a metal nickel skeleton, and then metal nickel is poured inside the metal nickel skeleton to form a limiting contact, and the metal sphere is cooled again to complete the preparation of the metal catalyst.

[0037] In summary, the hydrogenation catalyst and preparation process for organic liquid hydrogen storage are provided with a double-layer polyhedral structure carrier for nesting to achieve stability of the metal catalyst, and the inner layer of the double-layer polyhedral structure is also prepared with a metal catalyst, which ensures the catalytic performance of the metal catalyst while enhancing the stability of the metal catalyst structure to avoid the loss of catalytic performance after the internal metal catalyst is lost. At the same time, the double-layer nested structure can effectively increase the overall structural strength of the metal catalyst, facilitate the repeated use of the metal catalyst, make the metal catalyst not easy to disintegrate, and help maintain the stability of the catalyst itself, facilitate the recovery and reuse of the catalyst, and help save resources.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise one" do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydrogenation catalyst for hydrogen storage in organic liquids, characterized in that: The invention comprises an alumina carrier cage (1), wherein a nickel skeleton (2) is arranged inside the alumina carrier cage (1), a metal ball (3) is arranged inside the nickel skeleton (2), the mass ratio of the alumina carrier cage (1), the nickel skeleton (2) and the metal ball (3) is 3:2:5, a connecting contact (4) is arranged between the alumina carrier cage (1) and the nickel skeleton (2), a supporting contact (5) is arranged between the nickel skeleton (2) and the metal ball (3), and a plurality of through holes (6) are opened inside the metal ball (5).

2. A hydrogenation catalyst for organic liquid hydrogen storage according to claim 1, characterized in that: The alumina carrier cage (1) and the nickel skeleton (2) are both configured as polyhedral structures, the alumina carrier cage (1) and the nickel skeleton (2) are cross-distributed, and the alumina carrier cage (1) and the nickel skeleton (2) are connected and fixed via connection contacts (4).

3. A hydrogenation catalyst for organic liquid hydrogen storage according to claim 1, characterized in that: The metal ball (3) and the nickel skeleton (2) are clamped together via a supporting contact (5), the metal ball (3) and the supporting contact (5) are in close contact with each other, and the metal ball (3) is limited in position by the supporting contact (5).

4. A hydrogenation catalyst for organic liquid hydrogen storage according to claim 1, characterized in that: The metal ball (3) is a sphere formed by condensing a mixture of metal platinum and metal palladium, and the mass ratio of the metal platinum to the metal palladium is 4:

5.

5. A hydrogenation catalyst for organic liquid hydrogen storage according to claim 1, characterized in that: The metal ball (3) is a sphere formed by condensing a mixture of metal cobalt and metal molybdenum, and the mass ratio of the metal cobalt to the metal molybdenum is 1:1.

5.

6. A process for preparing a hydrogenation catalyst for hydrogen storage in an organic liquid, characterized in that: The following steps are involved: 1) Prepare raw materials, including aluminum oxide, nickel metal, platinum metal, palladium metal, cobalt metal and molybdenum metal; 2) Alumina and nickel metal are melted at high temperature and poured into a mold to solidify into a polyhedral structure, and at the same time, at least one metal selected from platinum metal, palladium metal, cobalt metal and molybdenum metal is melted, mixed and poured into a spherical mold to solidify into a spherical structure; 3) After the solidified nickel metal is nested inside the alumina carrier, the nickel metal is poured between the nickel metal skeleton and the alumina carrier to form a connection point and then cooled; 4) The cooled metal sphere is embedded in a metal nickel skeleton, and then metal nickel is poured inside the metal nickel skeleton to form a limiting contact, and the metal sphere is cooled again to complete the preparation of the metal catalyst.

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