Hydrogen storage system and preparation method and application thereof

Abstract

The invention belongs to the technical field of hydrogen storage materials, and particularly relates to a hydrogen storage system and a preparation method and application thereof. The hydrogen storage system comprises a catalyst and a hydrogen storage medium, the hydrogen storage medium comprises methylbenzene and 1, 3, 5-triphenylbenzene. According to the present invention, toluene is adopted as the solvent and the auxiliary hydrogen storage medium, 1, 3, 5-triphenylbenzene is adopted as the main hydrogen storage medium, and the hydrogenation reaction rate and the hydrogen storage amount can be improved under the low hydrogenation reaction temperature and the low hydrogenation reaction pressure through the combined action of the main hydrogen storage medium and the auxiliary hydrogen storage medium and the combination of the metal particle-loaded alumina catalyst; and as the reaction temperature and pressure are reduced, the cost can be reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrogen storage materials, and in particular relates to a hydrogen storage system and a preparation method and application thereof. Background Art

[0002] As a clean and environmentally friendly energy carrier, hydrogen energy has the potential for large-scale storage and can be efficiently converted into electricity and heat. Compared to unstable energy sources such as wind and solar energy, which are limited by natural conditions, hydrogen energy demonstrates greater practicality in practical applications. In the field of energy storage, compared with technologies such as supercapacitors, secondary batteries, and compressed air, hydrogen energy offers significant advantages in energy storage density, temporal flexibility, and spatial adaptability. The calorific value of hydrogen combustion is much higher than that of traditional fossil fuels and biofuels. Under standard conditions, the combustion of 1 gram of hydrogen releases 142.9 kJ of heat, approximately three times the calorific value of the same mass of gasoline. In addition, the only product of hydrogen combustion is water, and no harmful gases are produced. Therefore, hydrogen energy is widely regarded as a highly promising clean energy source. Vigorously developing hydrogen energy will not only help promote the development of environmental protection, but also have important significance for the sustainable growth of the national economy.

[0003] However, as a low-density and difficult-to-liquefy gas, hydrogen faces great challenges in storage and transportation. The main problem is that the energy consumption of hydrogen compression and liquefaction is high, and due to its small atomic and molecular size, it is easy to leak from the container. Therefore, achieving high-density storage and transportation of hydrogen is the key to the large-scale application of hydrogen energy. Traditional high-pressure gas cylinder hydrogen storage and liquid hydrogen storage technology have obvious deficiencies in safety and economy. In contrast, solid hydrogen storage materials have shown significant advantages in safety, ease of operation and transportation efficiency.

[0004] At present, the developed solid hydrogen storage materials mainly include adsorbents, organic liquids, metal interstitial hydrides, composite hydrides and chemical hydrides, but their performance is still difficult to meet the demand. Among them, organic liquid hydrogen storage technology realizes the storage and release of hydrogen through reversible hydrogenation-dehydrogenation reactions, and has the advantages of high energy density, good safety and convenient transportation. However, the existing organic liquid hydrogen storage systems mostly use a single hydrogen storage medium (such as toluene, naphthalene, etc.), which has problems such as low hydrogen storage density, slow reaction rate, and high catalyst cost. For example, the hydrogen storage density of toluene is only 6.1wt%, and the hydrogenation reaction requires higher temperature and pressure. In addition, the activity and stability of the catalyst are crucial to the hydrogen storage performance, but the existing catalysts (such as pure platinum or palladium) are expensive and easy to deactivate.

[0005] Therefore, it is of great significance to develop a hydrogen storage system with high hydrogen storage density and fast hydrogenation reaction rate. Summary of the Invention

[0006] The present invention aims to solve one or more technical problems existing in the above-mentioned prior art and at least provides a beneficial option. Specifically, the present invention provides a hydrogen storage system with a high hydrogen storage density and a fast hydrogenation reaction rate.

[0007] The inventive concept of the present invention: The hydrogen storage system of the present invention includes a catalyst and a hydrogen storage medium; the hydrogen storage medium includes toluene and 1,3,5-triphenylbenzene. The present invention uses toluene as a solvent and an auxiliary hydrogen storage medium, and 1,3,5-triphenylbenzene as the main hydrogen storage medium. Through the combined action of the main and auxiliary hydrogen storage media, the hydrogenation reaction rate, hydrogen storage capacity can be improved, and the stability is good.

[0008] Therefore, a first aspect of the present invention provides a hydrogen storage system.

[0009] Specifically, the hydrogen storage system includes a catalyst and a hydrogen storage medium;

[0010] The hydrogen storage medium includes toluene and 1,3,5-triphenylbenzene.

[0011] Preferably, the mass ratio of 1,3,5-triphenylbenzene to toluene is 1:(2 - 10); more preferably, the mass ratio of 1,3,5-triphenylbenzene to toluene is 1:(2 - 9); even more preferably, the mass ratio of 1,3,5-triphenylbenzene to toluene can be 1:4, 3:7 or 1:9.

[0012] Preferably, in the hydrogen storage system, the mass proportion of the catalyst is 4 - 6%; more preferably, in the hydrogen storage system, the mass proportion of the catalyst is 4.5 - 5.5%; even more preferably, in the hydrogen storage system, the mass proportion of the catalyst is 5%.

[0013] Preferably, the catalyst includes a carrier and metal particles supported on the carrier.

[0014] Preferably, the carrier includes Al2O3;

[0015] Preferably, in the catalyst, the loading amount of the metal particles is 0.9 - 5.5 wt%; more preferably, in the catalyst, the loading amount of the metal particles is 1 - 5 wt%. A low loading amount of metal particles can reduce costs.

[0016] Preferably, the metal particles include noble metal-based nanoparticles.

[0017] Preferably, the noble metal-based nanoparticles include at least one of platinum nanoparticles and palladium nanoparticles; more preferably, the noble metal-based nanoparticles include platinum nanoparticles.

[0018] Specifically, Al2O3 is not easily sintered at high temperatures and can anchor platinum particles to inhibit agglomeration. In addition, metal particles and Al2O3 can form noble metal particle - O - Al bonds, enhancing the anti - carbon deposition and anti - oxidation capabilities, making the catalyst have good stability.

[0019] The second aspect of the present invention provides a preparation method of the hydrogen storage system described in the first aspect of the present invention.

[0020] Specifically, the preparation method of the hydrogen storage system includes the following steps:

[0021] Mix the toluene and 1,3,5 - triphenylbenzene to obtain a hydrogen storage medium;

[0022] The catalyst and the hydrogen storage medium constitute the hydrogen storage system.

[0023] Preferably, the preparation method of the catalyst includes the following steps:

[0024] Mix the carrier and the metal precursor solution, dry, and then perform annealing to obtain the catalyst.

[0025] Preferably, the carrier includes Al2O3.

[0026] Preferably, the solute of the metal precursor solution includes at least one of chloroplatinic acid and chloropalladic acid.

[0027] Preferably, the concentration of the metal precursor solution is 0.08 - 0.12M; more preferably, the concentration of the metal precursor solution is 0.09 - 0.11M; even more preferably, the concentration of the metal precursor solution is 0.1M.

[0028] Preferably, the dosage ratio of the carrier to the metal precursor solution is 1g:(0.1 - 5)mL; more preferably, the dosage ratio of the carrier to the metal precursor solution is 1g:(0.2 - 6)mL; even more preferably, the dosage ratio of the carrier to the metal precursor solution is 1g:2.55mL.

[0029] Preferably, the drying temperature is 50 - 70°C; more preferably, the drying temperature is 55 - 65°C; even more preferably, the drying temperature is 60°C.

[0030] Preferably, the annealing temperature is 180 - 220°C and the annealing time is 1.0 - 2.0h; more preferably, the annealing temperature is 190 - 210°C and the annealing time is 1.3 - 1.7h; even more preferably, the annealing temperature is 200°C and the annealing time is 1.5h.

[0031] Specifically, first heat up to the annealing temperature at a certain heating rate, and then hold at the annealing temperature for a certain period of time to complete annealing.

[0032] Preferably, the heating rate for annealing is 4 - 6 °C / min; more preferably, the heating rate for annealing is 4.5 - 5.5 °C / min; even more preferably, the heating rate for annealing is 5 °C / min.

[0033] Preferably, the annealing is carried out in a mixed gas atmosphere containing an inert gas.

[0034] Preferably, the mixed gas includes argon and hydrogen.

[0035] Preferably, after mixing toluene and 1,3,5 - triphenylbenzene, stir at 30 - 50 °C for 25 - 35 min; more preferably, after mixing toluene and 1,3,5 - triphenylbenzene, stir at 35 - 45 °C for 27 - 33 min; even more preferably, after mixing toluene and 1,3,5 - triphenylbenzene, stir at 40 °C for 30 min.

[0036] The third aspect of the present invention provides an application of the hydrogen storage system described in the first aspect of the present invention in the field of hydrogen energy storage.

[0037] The hydrogen storage system of the present invention has a high hydrogen storage density, which can reach 6.4 wt%; at the same time, the temperature and pressure required for the hydrogenation reaction are relatively low, the hydrogenation reaction rate is fast, and 100% complete hydrogenation reaction can be achieved within 2 h at 100 °C and 15 bar, or 100% complete hydrogenation reaction can be achieved within 90 min at 120 °C and 15 bar, and it can be well applied to the efficient storage and transportation of hydrogen energy.

[0038] Compared with the prior art, the beneficial effects of the technical solution provided by the present invention are as follows:

[0039] (1) The hydrogen storage system of the present invention includes a catalyst and a hydrogen storage medium; the hydrogen storage medium includes toluene and 1,3,5 - triphenylbenzene. The present invention uses toluene as a solvent and an auxiliary hydrogen storage medium, and 1,3,5 - triphenylbenzene as the main hydrogen storage medium. Through the combined action of the main and auxiliary hydrogen storage media, the hydrogenation reaction rate and the maximum hydrogen storage capacity can be improved. In addition, the loading amount of metal particles in the catalyst of the present invention is low, the cost is low and the stability is high, which is suitable for large - scale application.

[0040] (2) The hydrogen storage system of the present invention has a high hydrogen storage density, reaching 6.4 wt%. At the same time, a rapid hydrogenation reaction can be achieved at relatively low hydrogenation reaction temperatures and pressures. For example, at 100 °C and 15 bar, 100% complete hydrogenation reaction can be achieved within 2 hours, or at 120 °C and 15 bar, 100% complete hydrogenation reaction can be achieved within 90 minutes. It has the characteristics of low cost and high efficiency and can be well applied to the field of hydrogen energy storage.

[0041] (3) The preparation method of the hydrogen storage system of the present invention is simple and fast, facilitating large-scale production applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is the X-ray diffraction pattern of the Pt / Al2O3 catalyst in Example 1 of the present invention;

[0043] Figure 2 It is the gas chromatogram of the liquid phase products after the hydrogen storage system in Example 1 of the present invention is hydrogenated at 100 °C for 2 hours and at 120 °C for 2 hours respectively;

[0044] Figure 3 It is the curve graph showing the change of toluene conversion rate with time in the hydrogen storage system of Example 1 of the present invention;

[0045] Figure 4 It is the curve graph showing the change of 1,3,5-triphenylbenzene conversion rate with time in the hydrogen storage system of Example 1 of the present invention;

[0046] Figure 5 It is the gas chromatogram of the liquid phase products after the hydrogen storage system in Example 1 of the present invention is hydrogenated at 120 °C for 10 minutes, 30 minutes and 90 minutes;

[0047] Figure 6 It is the comparative curve graph of the hydrogen storage reaction rates of 1,3,5-triphenylbenzene and toluene in the hydrogen storage system of Example 1 of the present invention;

[0048] Figure 7 It is the bar graph of the hydrogen storage amounts of the hydrogen storage systems in Examples 1-3 of the present invention;

[0049] Figure 8 It is the bar graph of the hydrogenation saturation times of the hydrogen storage systems in Examples 1-3 of the present invention;

[0050] Figure 9 It is the bar graph of the hydrogen storage amounts of the hydrogen storage systems in Comparative Examples 1-3 of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0051] In order to make those skilled in the art more clearly understand the technical solutions described in the present invention, the following examples are listed for illustration. It should be noted that the following examples do not limit the scope of protection required by the present invention.

[0052] Unless otherwise specified, the raw materials, reagents or devices used in the following examples can be obtained from conventional commercial channels or can be obtained by existing known methods.

[0053] Example 1

[0054] A hydrogen storage system consists of a catalyst and a hydrogen storage medium. In the hydrogen storage system, the mass ratio of the catalyst is 5%; the hydrogen storage medium consists of 1,3,5-triphenylbenzene toluene and toluene with a mass ratio of 1:4; the catalyst is alumina loaded with platinum nanoparticles, and the loading amount of platinum nanoparticles is 5 wt%.

[0055] A preparation method of a hydrogen storage system includes the following steps:

[0056] Catalyst preparation: Take 1 g of commercial alumina powder, dropwise add 2.55 mL of 0.1 M chloroplatinic acid aqueous solution, stir evenly and then dry in vacuum to obtain the dried powder; then place it in a tube furnace, introduce an argon-hydrogen mixture (the volume ratio of argon to hydrogen is 95:5), heat it to 200 °C at a rate of 5 °C / min, anneal for 1.5 h, and cool to obtain the Pt / Al2O3 catalyst;

[0057] Hydrogen storage medium preparation: Weigh 2 g of 1,3,5-triphenylbenzene (TPhB) powder and 8 g of toluene, add them to a sealed container, and then stir magnetically at 40 °C for 30 min until the TPhB is completely dissolved to obtain a clear and transparent yellow liquid as the hydrogen storage medium;

[0058] The prepared Pt / Al2O3 catalyst and hydrogen storage medium constitute the hydrogen storage system of Example 1.

[0059] Example 2

[0060] A hydrogen storage system consists of a catalyst and a hydrogen storage medium. In the hydrogen storage system, the mass ratio of the catalyst is 5%; the hydrogen storage medium consists of 1,3,5-triphenylbenzene toluene and toluene with a mass ratio of 3:7; the catalyst is alumina loaded with platinum nanoparticles, and the loading amount of platinum nanoparticles is 5 wt%.

[0061] A preparation method of a hydrogen storage system includes the following steps:

[0062] Catalyst preparation: Take 1 g of commercial alumina powder, dropwise add 2.55 mL of 0.1 M chloroplatinic acid aqueous solution, stir evenly and then dry in vacuum to obtain the dried powder; then place it in a tube furnace, introduce an argon-hydrogen mixture (the volume ratio of argon to hydrogen is 95:5), heat it to 200 °C at a rate of 5 °C / min, anneal for 1.5 h, and cool to obtain the Pt / Al2O3 catalyst;

[0063] Preparation of hydrogen storage medium: Weigh 3 g of 1,3,5-triphenylbenzene (TPhB) powder and 7 g of toluene, add them into a sealed container, and then stir magnetically at 40 °C for 30 min until the TPhB is completely dissolved to obtain a clear and transparent yellow liquid, which serves as the hydrogen storage medium;

[0064] The prepared Pt / Al2O3 catalyst and the hydrogen storage medium constitute the hydrogen storage system of Example 2.

[0065] Example 3

[0066] A hydrogen storage system consists of a catalyst and a hydrogen storage medium. In the hydrogen storage system, the mass ratio of the catalyst is 5%; the hydrogen storage medium consists of 1,3,5-triphenylbenzene and toluene with a mass ratio of 1:9; the catalyst is alumina loaded with platinum nanoparticles, and the loading amount of platinum nanoparticles is 1 wt%.

[0067] A preparation method of a hydrogen storage system includes the following steps:

[0068] Catalyst preparation: Take 1 g of commercial alumina powder, dropwise add 0.51 mL of 0.1 M chloroplatinic acid aqueous solution, stir evenly and then dry it in vacuum to obtain the dried powder; then place it in a tubular furnace, introduce an argon-hydrogen mixture (the volume ratio of argon to hydrogen is 95:5), heat it to 200 °C at a rate of 5 °C / min, anneal for 1.5 h, and cool to obtain the Pt / Al2O3 catalyst;

[0069] Hydrogen storage medium preparation: Weigh 1 g of 1,3,5-triphenylbenzene (TPhB) powder and 9 g of toluene, add them into a sealed container, and then stir magnetically at 40 °C for 30 min until the TPhB is completely dissolved to obtain a clear and transparent yellow liquid, which serves as the hydrogen storage medium;

[0070] The prepared Pt / Al2O3 catalyst and the hydrogen storage medium constitute the hydrogen storage system of Example 3.

[0071] Comparative Example 1

[0072] The difference between Comparative Example 1 and Example 1 is only that in Comparative Example 1, only toluene is used as the hydrogen storage medium, and the others are the same as in Example 1.

[0073] Comparative Example 2

[0074] The difference between Comparative Example 2 and Example 1 is only that in Comparative Example 2, toluene and naphthalene are used as the hydrogen storage medium, that is, an equal amount of naphthalene is used to replace 1,3,5-triphenylbenzene, and the others are the same as in Example 1.

[0075] Comparative Example 3

[0076] The difference between Comparative Example 3 and Example 1 is only that toluene and benzyl alcohol are used as the hydrogen storage medium in Comparative Example 3, that is, an equal amount of benzyl alcohol is used to replace 1,3,5-triphenylbenzene, and the others are the same as in Example 1.

[0077] Performance Test

[0078] 1. X-ray Diffraction Analysis

[0079] The Pt / Al2O3 catalyst prepared in Example 1 was subjected to X-ray diffraction analysis, and the X-ray diffraction pattern is as Figure 1 shown.

[0080] Figure 1 The standard cards of platinum (Pt) and alumina (Al2O3) were compared, and it was confirmed that the catalyst was a platinum-loaded alumina, and the diffraction peak intensity was weak, indicating that the platinum nanoparticles had a small size and low crystallinity.

[0081] 2. Hydrogen Storage Performance Test

[0082] The prepared organic hydrogen storage medium and the Pt / Al2O3 catalyst were placed in a high-pressure reactor, and 15 bar of hydrogen was introduced. The hydrogenation reaction was carried out at 100 °C and 120 °C respectively. After a period of reaction, a small amount of liquid product was extracted, and the conversion rate of organic matter was analyzed by gas chromatography; and the hydrogen absorption amount was calculated according to the theoretical hydrogen content of organic molecules, and the hydrogen storage density and reaction rate were further calculated.

[0083] For the TPhB-toluene system of Example 1, after the hydrogenation reaction was carried out at 100 °C for 2 h and 120 °C for 2 h under the action of the Pt / Al2O3 catalyst, the gas chromatograms of the liquid phase products were tested respectively. The gas chromatograms of the liquid phase products of the hydrogen storage system of Example 1 after the hydrogenation reaction at 100 °C for 2 h and 120 °C for 2 h are as Figure 2 shown.

[0084] It can be seen from Figure 2 that at 100 °C and a hydrogen pressure of 15 bar, 100% complete hydrogenation reaction can be achieved within 2 h, and toluene is completely converted into methylcyclohexane after the reaction.

[0085] The curve of the toluene conversion rate changing with time in the hydrogen storage system of Example 1 is as Figure 3 shown.

[0086] The curve of 1,3,5-triphenylbenzene changing with time in the hydrogen storage system of Example 1 is as Figure 4 shown.

[0087] It can be seen from Figure 3It can be seen that at 100 °C and 120 °C, toluene reached a conversion rate close to 100% in about 80 min. Toluene was converted into methylcyclohexane, and the hydrogenation reaction kinetics were faster at 120 °C. From Figure 4 It can be seen that at 100 °C and 120 °C, 1,3,5-triphenylbenzene reached a conversion rate close to 100% in about 60 min. 1,3,5-triphenylbenzene was converted into 1,3,5-tricyclohexylcyclohexane, and the hydrogenation reaction kinetics were faster at 120 °C.

[0088] For the TPhB-toluene system of Example 1, after hydrogenation reaction at 120 °C for 10 min, 30 min and 90 min under the action of Pt / Al2O3 catalyst, gas chromatography was used to test the liquid-phase products. After the hydrogenation reaction of the hydrogen storage system of Example 1 at 120 °C for 10 min, 30 min and 90 min, the gas chromatograms of the liquid-phase products are as Figure 5 shown.

[0089] From Figure 5 it can be seen that a large number of intermediate products appeared in the initial stage of the reaction (10 min), and 1,3,5-triphenylbenzene was completely converted into 1,3,5-tricyclohexylcyclohexane after 90 min.

[0090] At 100 °C, the comparative curve graph of the hydrogen storage reaction rates of 1,3,5-triphenylbenzene and toluene in the hydrogen storage system of Example 1 is as Figure 6 shown. From Figure 6 it can be seen that the hydrogenation reaction kinetics of 1,3,5-triphenylbenzene are significantly faster than those of toluene.

[0091] The hydrogen storage capacities of the hydrogen storage systems of Examples 1-3 are as Figure 7 shown. Among them, 10%, 20%, and 30% on the abscissa represent the mass ratios of 1,3,5-triphenylbenzene in the hydrogen storage media of Example 3, Example 1, and Example 2, respectively. From Figure 7 it can be seen that as the content of 1,3,5-triphenylbenzene increases, the total hydrogen storage capacity of the system increases.

[0092] The hydrogenation saturation times of the hydrogen storage systems of Examples 1-3 are as Figure 8 shown. Among them, 10%, 20%, and 30% on the abscissa represent the mass ratios of 1,3,5-triphenylbenzene in the hydrogen storage media of Example 3, Example 1, and Example 2, respectively. From Figure 8 it can be seen that as the content of 1,3,5-triphenylbenzene increases, the hydrogenation saturation time prolongs and the hydrogenation kinetics of the system slow down.

[0093] From Figure 7 and Figure 8It can be seen that under the condition of the appropriate mass ratio of 1,3,5-triphenylbenzene, fast hydrogenation reaction kinetics and a high total hydrogen storage capacity can be achieved.

[0094] The hydrogen storage capacities of the hydrogen storage systems of Comparative Examples 1-3 are as Figure 9 shown. It can be seen from Figure 9 that the hydrogen storage capacities of the hydrogen storage systems of Comparative Examples 1-3 are all inferior to that of the hydrogen storage system of Example 1.

[0095] In summary, the present invention uses toluene as a solvent and an auxiliary hydrogen storage medium, 1,3,5-triphenylbenzene as the main hydrogen storage medium. Through the combined action of the main and auxiliary hydrogen storage media and in combination with an alumina catalyst loaded with metal particles, the hydrogenation reaction rate and hydrogen storage capacity can be increased at a lower hydrogenation reaction temperature and hydrogenation reaction pressure. Moreover, due to the reduction of the reaction temperature and pressure, the energy consumption is less and the cost is reduced.

[0096] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A hydrogen storage system, characterized in that, It includes a catalyst and a hydrogen storage medium; The hydrogen storage medium includes toluene and 1,3,5-triphenylbenzene.

2. The hydrogen storage system according to claim 1, characterized in that, The mass ratio of 1,3,5-triphenylbenzene to toluene is 1:(2 - 10); and / or, in the hydrogen storage system, the mass percentage of the catalyst is 4 - 6%.

3. The hydrogen storage system according to claim 1, characterized in that, The catalyst includes a carrier and metal particles supported on the carrier.

4. The hydrogen storage system according to claim 3, characterized in that, The carrier includes Al2O3; and / or, in the catalyst, the loading amount of the metal particles is 0.9 - 5.5 wt%; and / or, the metal particles include noble metal-based nanoparticles.

5. The hydrogen storage system according to claim 4, characterized in that, The noble metal-based nanoparticles include at least one of platinum nanoparticles and palladium nanoparticles.

6. A method for preparing a hydrogen storage system according to any one of claims 1-5, characterized in that, The preparation method includes the following steps: Mix toluene and 1,3,5-triphenylbenzene to obtain a hydrogen storage medium; The catalyst and the hydrogen storage medium constitute the hydrogen storage system.

7. The preparation method according to claim 6, characterized in that, The preparation method of the catalyst includes the following steps: Mix the carrier and a metal precursor solution, dry, and then anneal to obtain it.

8. The preparation method according to claim 7, wherein The solute of the metal precursor solution includes at least one of chloroplatinic acid and chloropalladic acid; and / or, the drying temperature is 50 - 70 °C; and / or, the annealing temperature is 180 - 220 °C, and the annealing time is 1.0 - 2.0 h.

9. The preparation method according to claim 6, characterized in that, After mixing, the toluene and 1,3,5-triphenylbenzene are stirred at a temperature of 30 - 50 °C for 25 - 35 min.

10. Application of the hydrogen storage system according to any one of claims 1 - 5 in the field of hydrogen energy storage.

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