Catalyst carrier, ammonia decomposition catalyst and preparation method

A catalyst carrier, catalyst technology, applied in catalyst carrier, chemical instrument and method, physical/chemical process catalyst, etc., can solve the problems of low interaction strength, affecting catalyst activity and stability, etc.

Active Publication Date: 2020-10-20
福大紫金氢能科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that the interaction strength between the ammonia decomposition catalyst carrier and the active component is not high, thereby affecting the activity and stability of the catalyst, thereby providing a catalyst carrier containing Ammonia decomposition catalyst and preparation method of the carrier

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  • Catalyst carrier, ammonia decomposition catalyst and preparation method

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Embodiment 1

[0036] This embodiment provides an ammonia decomposition catalyst, including a carbon-modified boron nitride carrier and an active component Ru, wherein, in the carbon-modified boron nitride carrier, the doping amount of carbon is 5%, and in the active component, In terms of metal elements, the loading amount of Ru is 3%.

[0037] The preparation method of this catalyst is as follows:

[0038] Mix 11.8g of urea, 12.1g of boric acid, and 0.25g of activated carbon evenly, and perform calcination under a nitrogen atmosphere, wherein the calcination temperature is 900°C, and the calcination time is 4h, to obtain a carbon-modified boron nitride carrier;

[0039] Add 3.0 g of the above carbon-modified boron nitride carrier to 45.9 mL of RuCl with a molar concentration of 0.02 mol / L 3 The ammonia decomposition catalyst was obtained by step-by-step impregnation in the aqueous solution for five times, drying, and then roasting in a nitrogen atmosphere at a roasting temperature of 550°...

Embodiment 2

[0041] This embodiment provides an ammonia decomposition catalyst, including a carbon-modified boron nitride carrier and an active component Ni, wherein, in the carbon-modified boron nitride carrier, the doping amount of carbon is 5%, and in the active component, In terms of metal elements, the loading amount of Ni is 12%.

[0042] The preparation method of this catalyst is as follows:

[0043] Mix 11.8g of urea, 12.1g of boric acid, and 0.25g of activated carbon evenly, and perform calcination under a nitrogen atmosphere, wherein the calcination temperature is 900°C, and the calcination time is 4h, to obtain a carbon-modified boron nitride carrier;

[0044] Add 3.0 g of the above carbon-modified boron nitride carrier to 70 mL of Ni(NO 3 ) 2 The ammonia decomposition catalyst was obtained by step-by-step impregnation in the aqueous solution for seven times, drying, and then roasting in a nitrogen atmosphere at a roasting temperature of 900° C. for 2 hours.

Embodiment 3

[0046] This embodiment provides an ammonia decomposition catalyst, including a carbon-modified boron nitride carrier and an active component Ru, wherein, in the carbon-modified boron nitride carrier, the doping amount of carbon is 1%, and in the active component, In terms of metal elements, the loading amount of Ru is 1%.

[0047] The preparation method of this catalyst is as follows:

[0048] Mix 25.8g of melamine, 24.0g of boron chloride and 0.02g of polyvinyl alcohol uniformly, and perform calcination under a nitrogen atmosphere, wherein the calcination temperature is 800°C, and the calcination time is 12h, to obtain a carbon-modified boron nitride carrier;

[0049] Add 3.0 g of the above carbon-modified boron nitride carrier to 30 mL of Ru(NO 3 ) 3 In the aqueous solution, step-by-step impregnation was performed three times, dried, and then roasted in a nitrogen atmosphere at a roasting temperature of 550° C. for 6 hours to obtain the ammonia decomposition catalyst.

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Abstract

The invention belongs to the technical field of catalytic materials, and particularly relates to a catalyst carrier, an ammonia decomposition catalyst and a preparation method. The catalyst carrier iscarbon-modified boron nitride, and based on the total mass of the carrier, the doping amount of carbon is 1-8%. A certain amount of carbon is doped in the boron nitride body, so that the electron distribution in the carrier can be improved, and the delocalization of electrons in the carrier is enhanced. When the catalyst carrier is used, the interaction strength between an active component and the carrier can be improved, and the microstructure and surface electron characteristics of the active component are improved, so that the activity and stability of the catalyst are improved.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, and in particular relates to a catalyst carrier, 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 realize the effective utilization of hydrogen in ammonia hydrogen storage carriers, it is particularly important to develop catalysts that can efficiently catalyze the decomposition of ammonia. [0003] Currently, supported Ru-based catalysts are recognized as having the highest catalytic activity for ammoni...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J32/00C01B3/04
CPCB01J27/24C01B3/04B01J35/394Y02E60/36
Inventor 江莉龙陈崇启罗宇林立蔡国辉
Owner 福大紫金氢能科技股份有限公司
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