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Preparation method of mesogen oxide and mesogen nitride, ammonia decomposition catalyst and preparation method

A catalyst and ammonia decomposition technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, catalyst activation/preparation, rare earth metal oxide/hydroxide, etc., can solve the problem of low catalytic activity and mesogenic oxide /Limited types of nitrides, environmental pollution, etc.

Active Publication Date: 2022-04-29
福大紫金氢能科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Therefore, as one aspect of the present invention, the technical problem to be solved by the present invention is to overcome the need to use organic polymers or organic solvents in the preparation of mesogenic oxides / nitrogen oxides in the prior art, which will cause environmental pollution, and to prepare The obtained mesogenic oxides / nitrides have limited types of defects, thus providing a method for the preparation of mesogenic oxides and mesogenic nitrides with a wide range of applications and pollution-free
[0007] As another aspect of the present invention, the technical problem to be solved by the present invention is to overcome the low catalytic activity of the ammonia decomposition catalyst in the prior art, especially the defect that the low temperature activity of the ammonia decomposition catalyst needs to be further improved, thereby providing an ammonia decomposition Catalyst and preparation method

Method used

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  • Preparation method of mesogen oxide and mesogen nitride, ammonia decomposition catalyst and preparation method
  • Preparation method of mesogen oxide and mesogen nitride, ammonia decomposition catalyst and preparation method
  • Preparation method of mesogen oxide and mesogen nitride, ammonia decomposition catalyst and preparation method

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Embodiment 1

[0055] The present embodiment provides a kind of ammonia decomposition catalyst, with ZrO 2 The mesoscopic crystal is used as a carrier, and the active component is Ru, wherein, in terms of metal elements, the loading amount of the active component Ru is 3wt%.

[0056] The preparation method of this catalyst is as follows:

[0057] Weigh 11.2788g ZrOCl 2 ·8H 2 O was dissolved in 70ml deionized water and weighed 0.6475g NH 4 Add F to the above solution to obtain a mixed solution, and let it stand for 2 hours; transfer the mixed solution to a 100ml hydrothermal reaction kettle, and conduct a hydrothermal reaction at 200°C for 24 hours; after the hydrothermal kettle is naturally cooled to room temperature, centrifuge the hydrothermal product Wash until no Cl is detected - ; Then dry the obtained precipitate at 110°C for 12h, after drying, bake in a muffle furnace at 500°C for 8h to obtain ZrO 2 mesoscopic crystals.

[0058] The above 3.0g of ZrO 2 Add 45.9 mL of RuCl with ...

Embodiment 2

[0060] The present embodiment provides a kind of ammonia decomposition catalyst, with TiO 2 The mesoscopic crystal is used as a carrier, and the active component is Ru, wherein, in terms of metal elements, the loading amount of Ru is 3wt%.

[0061] The preparation method of this catalyst is as follows:

[0062] Weigh 8.9095g (NH 4 ) 2 TiF 6 Dissolve in 55mL of deionized water, then slowly add 15mL of 3mol / L ammonia solution dropwise; put the mixed solution in a constant temperature water bath at 25°C for 8h, then transfer it to a 100mL reactor for hydrothermal reaction at 130°C for 24h; Cool to room temperature, then centrifuge and wash with distilled water until Cl is no longer detectable - , dried at 110°C for 12h, and then calcined at 800°C for 2h to obtain TiO 2 mesoscopic crystals.

[0063] The above 3.0g of TiO 2 Add 45.9 mL of RuCl with a molar concentration of 0.02 mol / L to mesoscopic crystals 3 The ammonia decomposition catalyst was obtained by step-by-step im...

Embodiment 3

[0065] This embodiment provides an ammonia decomposition catalyst, which uses TiN mesoscopic crystals as a carrier, and the active component is Ru, wherein, calculated as metal elements, the loading amount of Ru is 3 wt%.

[0066] The preparation method of this catalyst is as follows:

[0067] Weigh 8.9095g (NH 4 ) 2 TiF 6 Dissolve in 55mL of deionized water, then slowly add 15mL of 3mol / L ammonia solution dropwise; put the mixed solution in a constant temperature water bath at 25°C for 8h, then transfer it to a 100mL reactor for hydrothermal reaction at 130°C for 24h; Cool to room temperature, then centrifuge and wash with distilled water until Cl is no longer detectable - , dried at 110°C for 12h, and then calcined at 800°C for 2h to obtain TiO 2 mesoscopic crystal; the prepared TiO 2 The mesoscopic crystals were heated slowly to 800°C in an ammonia atmosphere in a muffle furnace, and were nitrided for 2 hours to obtain TiN mesoscopic crystals.

[0068] Add 3.0 g of th...

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Abstract

The invention belongs to the technical field of catalytic materials, and in particular relates to a preparation method of mesogenic oxides and mesogenic nitrides, an ammonia decomposition catalyst and a preparation method. The preparation method of mesogenic oxides and mesogenic nitrides provided by the present invention adds inorganic substances such as ammonia water, urea, and soluble salts, and under the action of inorganic substances, the nanostructure units are oriented to assemble to form mesogenic materials, which can avoid the use of organic substances The environmental pollution problem caused by this method is suitable for the preparation of most mesogenic materials. Using the obtained mesogenic oxide or crystalline nitride as the carrier of the ammonia decomposition catalyst can improve the ammonia decomposition performance of the catalyst, especially to improve the ammonia decomposition catalyst. Low temperature ammonia decomposition performance.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, and in particular relates to a preparation method of mesogenic oxides and mesogenic nitrides, an ammonia decomposition catalyst and a preparation method. Background technique [0002] Ammonia is not only an important inorganic chemical product, but also has unique advantages as a hydrogen carrier. Ammonia is easy to liquefy, has a pungent smell, is non-flammable and non-toxic at low concentrations, has high hydrogen storage density, mature production, storage and transportation technology, and has no carbon emissions in the hydrogen production process. It is an efficient, clean and safe hydrogen storage carrier . In order to achieve an economical and safe hydrogen storage process, it is particularly important to develop catalysts that can efficiently catalyze the ammonia decomposition reaction. [0003] At present, the supported Ru metal catalyst is recognized as having the highest ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B21/076C01F17/206C01G23/053C01G25/02B01J21/06B01J27/24B01J23/10B01J32/00B01J37/10B01J37/08B01J23/46B01J23/83B01J37/02B01J35/10
CPCB01J21/066B01J21/063B01J27/24B01J23/10B01J37/10B01J37/082B01J23/462B01J23/83B01J23/002B01J37/0201B01J37/088C01G25/02C01G23/053C01B21/076C01F17/206B01J35/23B01J35/633B01J35/647B01J35/615
Inventor 陈崇启罗宇江莉龙林立蔡国辉
Owner 福大紫金氢能科技股份有限公司
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