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Ammonia synthesis method by coupling solid oxide electrolysis with fossil fuel ammonia synthesis

A solid oxide and fossil fuel technology, applied in the field of ammonia synthesis, can solve problems such as high energy consumption and high carbon emissions, and achieve the effects of reducing carbon emissions, realizing recycling, and realizing carbon resource recycling

Active Publication Date: 2019-08-23
FUZHOU UNIV ASSET MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects of high energy consumption and high carbon emission in the ammonia synthesis process in the prior art, thereby providing a method for synthesizing ammonia coupled with solid oxide electrolysis / fossil fuel ammonia synthesis

Method used

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  • Ammonia synthesis method by coupling solid oxide electrolysis with fossil fuel ammonia synthesis
  • Ammonia synthesis method by coupling solid oxide electrolysis with fossil fuel ammonia synthesis
  • Ammonia synthesis method by coupling solid oxide electrolysis with fossil fuel ammonia synthesis

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Embodiment 1

[0038] This embodiment provides a method for synthesizing ammonia in which renewable energy is used to drive a solid oxide electrolytic cell coupled with a fossil fuel ammonia synthesis system. Among them, the coal low-pressure ammonia synthesis process and the solid oxide electrolytic cell (SOEC) are used to co-electrolyze CO 2 / H 2 O integrated synthesis of ammonia, combined with the following figure 1 The present invention will be described in detail with specific examples, but the scope of the present invention will not be limited thereby.

[0039] Such as figure 1 As shown, the coal low-pressure ammonia synthesis system is simplified into air separation unit 1, coal gasification unit 2, desulfurization and dust removal unit 3, water-gas shift unit 4, desulfurization and decarbonization unit 5, methanolation unit 6, methanation unit 7, ammonia synthesis unit 8, etc. . The raw air passes through the air separation unit 1, and is separated by low temperature and pressure...

Embodiment 2

[0048] This embodiment provides a method for synthesizing ammonia by using renewable energy to drive a solid oxide electrolytic cell. Among them, the natural gas ammonia synthesis process and the solid oxide electrolysis cell (SOEC) are used to co-electrolyze CO 2 / H 2 O integrated synthesis of ammonia, combined with the following figure 2 The present invention will be described in detail with specific examples, but the scope of the present invention will not be limited thereby.

[0049] Such as figure 2 As shown, the ammonia synthesis system from natural gas is simplified into air separation unit 1, desulfurization and dust removal unit 3, natural gas reforming unit 16, water-gas shift unit 4, desulfurization and decarbonization unit 5, methanolation unit 6, methanation unit 7, ammonia synthesis unit 8, etc. . The raw air passes through the air separation unit 1, and is separated by low temperature and pressure to obtain high-purity oxygen with a concentration higher th...

Embodiment 3

[0058] This embodiment provides a method for synthesizing ammonia by using renewable energy to drive a solid oxide electrolytic cell. Among them, the naphtha synthesis ammonia process and the solid oxide electrolytic cell (SOEC) electrolysis of H 2 O integrated synthesis of ammonia, combined with the following image 3 The present invention will be described in detail with specific examples, but the scope of the present invention will not be limited thereby.

[0059] Such as image 3As shown, the naphtha synthesis ammonia system is simplified into air separation unit 1, naphtha gasification unit 2, desulfurization and dust removal unit 3, water gas shift unit 4, desulfurization and decarbonization unit 5, methanolation unit 6, methanation unit 7, ammonia synthesis unit 8 and other links. The raw air passes through the air separation unit 1, and is separated by low temperature and pressure to obtain high-purity oxygen with a concentration higher than 99.5%. Naphtha undergoe...

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Abstract

The invention belongs to the technical field of synthetic ammonia, and particularly relates to an ammonia synthesis method by coupling a solid oxide electrolytic tank with a fossil fuel ammonia synthesis system. The method comprises the following steps: preparing hydrogen by taking fossil fuel as a raw material, then mixing the hydrogen with nitrogen to carry out an ammonia synthesis reaction, then collecting carbon dioxide gas generated in the hydrogen production step, mixing the carbon dioxide gas with water vapor, introducing the mixed gas into a solid oxide electrolytic tank to carry out electrolysis, and returning the generated gas to the hydrogen production step for cyclic utilization. According to the invention, the fossil fuel ammonia synthesis system is coupled with the solid oxide electrolytic tank, so that carbon dioxide gas generated in the process of hydrogen production by fossil fuel is effectively utilized, cyclic utilization of carbon dioxide is realized, and carbon emission is reduced.

Description

technical field [0001] The invention belongs to the technical field of ammonia synthesis, in particular to an ammonia synthesis method utilizing a solid oxide electrolytic cell coupled with a fossil fuel ammonia synthesis system. Background technique [0002] Ammonia is one of the most basic chemical raw materials for modern industry and agricultural production. About 80% of ammonia is used to produce fertilizers. Industrial ammonia synthesis has made outstanding contributions to solving people's food and clothing problems. In emerging fields, ammonia has the advantages of easy liquefaction, high volumetric energy density, and no carbon emissions. It is expected to be used as an efficient hydrogen carrier in the field of new energy. [0003] Ammonia is synthesized industrially by using the Haber-Bosch method to convert N 2 and H 2 Pass it into a high-temperature, high-pressure reactor (450-500°C, 20-30MPa) for catalytic addition reaction to produce NH 3 the process of. I...

Claims

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Application Information

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IPC IPC(8): C01C1/04C01B3/40
CPCC01B3/40C01B2203/0227C01B2203/0465C01B2203/047C01B2203/0475C01B2203/0485C01B2203/068C01B2203/1052C01B2203/1235C01B2203/1241C01C1/04Y02P20/133
Inventor 罗宇江莉龙陈崇启
Owner FUZHOU UNIV ASSET MANAGEMENT CO LTD
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