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Method for preparing hydrogen through catalytic cracking of methane in fused salt and device applied to method

A technology of catalytic cracking and molten salt, applied in chemical instruments and methods, hydrogen/synthesis gas production, hydrogen and other directions, can solve problems such as hydrogen devices and methods that are not involved, achieve improved service life, compact and simple process flow, and easy to scale up Effect

Active Publication Date: 2017-07-21
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] None of the above-mentioned patents involves the device and method for producing hydrogen by using a fluidized bed reactor to catalytically crack natural gas with a catalyst in molten salt

Method used

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  • Method for preparing hydrogen through catalytic cracking of methane in fused salt and device applied to method
  • Method for preparing hydrogen through catalytic cracking of methane in fused salt and device applied to method
  • Method for preparing hydrogen through catalytic cracking of methane in fused salt and device applied to method

Examples

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Effect test

Embodiment 1

[0041] refer to figure 1 and figure 2 Summary of the invention: the present invention provides a kind of method for preparing hydrogen by catalytic cracking methane in molten salt and the device that realizes the method, it does not need follow-up gas separation procedure, can directly produce hydrogen in molten salt, and technological process is compact and simple, easy to enlarge, solves solve the problems in the prior art.

[0042] A device for realizing the method for preparing hydrogen by catalytically cracking methane in molten salt, the device includes a fluidized bed reactor 1, a gas-solid separator 2, a molten salt circulation pump 3, and a molten salt regeneration system 4. The bottom of the fluidized bed reactor is provided with a hydrogen production raw material inlet 16, a gasification agent inlet 17, a circulating molten salt inlet 18 and a material circulation port 15, and the upper part of the fluidized bed reactor is provided with a gas product outlet 14. Th...

Embodiment 2

[0065] Same as Example 1, the difference is:

[0066] The raw material for hydrogen production is landfill gas, the temperature in the fluidized bed reactor is 800°C, the gasification agent is air, the catalyst is Ni powder for catalytic cracking of methane, and the molten salt is a mixture of potassium hydroxide and potassium carbonate. The mass fraction of potassium is 60%. The angle between the partition and the horizontal plane is 60°.

[0067] The hydrogen content in the produced gas is 61%, and the remaining 39% is mainly nitrogen.

Embodiment 3

[0069] Same as Example 1, the difference is:

[0070] The raw material for hydrogen production is natural gas, the temperature in the fluidized bed reactor is 1000°C, the gasification agent is oxygen, the catalyst is Ni powder for catalytic cracking of methane, and the molten salt is a mixture of potassium hydroxide and potassium carbonate, of which the mass of potassium hydroxide The fraction is 75%, and the angle between the dividing plate and the horizontal plane is 45°.

[0071] The hydrogen content in the produced gas is 99.5%.

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Abstract

The invention discloses a method for preparing hydrogen through catalytic cracking of methane in fused salt. The method includes that hydrogen manufacturing raw materials, gasifying agents and the fused salt enter a fluidized bed reactor from the bottom of the fluidized bed reactor, and a catalyst in the fluidized bed reactor reacts with the hydrogen manufacturing raw materials to generate a solid product and a gaseous product, the solid product is in a fluidized state under the joint action of the fused salt and the gaseous product, and the liquid fused salt is on the upper middle portion of the fluidized bed reactor; after liquid-solid separation of the fused salt in the fluidized bed reactor, a part of the fused salt re-enters the fluidized bed reactor from the bottom of the fluidized bed reactor to power the fluidized bed reactor, and the other part of the fused salt enters a fused salt regenerating system to regenerate and re-enter the fluidized bed reactor from the bottom of the fluidized bed reactor to power the fluidized bed reactor. The method and a device applied to the method have the advantages that follow-up gas separation procedures are not needed, and the hydrogen can be generated in the fused salt directly, so that technological process is compact and simple, and easiness in amplification is achieved.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of energy utilization, and in particular relates to a method for preparing hydrogen by catalytically cracking methane in molten salt and a device for realizing the method. [0003] Background technique: [0004] As a clean energy source, hydrogen is expected to become one of the main energy sources in the 21st century. At present, about 96% of the hydrogen energy in the world is produced by steam catalytic gasification and partial oxidation of fossil fuels (natural gas, coal, petroleum, etc.). [0005] Molten salt refers to the molten liquid of salt, and generally speaking, molten salt refers to the molten body of inorganic salt. At present, the most used high-temperature molten salts are carbonates, nitrates, chlorides, etc. of alkali metals (Li, Na, K, etc.). The results of the study show that the molten salt has a strong effect on CH 4 The cracking effect is poor. Chinese patent ZL 201110166589...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/26
CPCC01B3/26C01B2203/0277C01B2203/1058
Inventor 王小波赵增立刘安琪李海滨郑安庆
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI