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A system and process of hydrogen -based hydrogen -based hydrogen -based hydrogen -based hydrogen -based hydrogen -based hydrogen -based hydrogen -based hydrogenation of amino thermal chemical energy storage

A high-temperature electrolysis and thermochemical technology, applied in the chemical industry, electrolysis components, electrolysis process, etc., can solve the problems of harsh reaction conditions, incomplete conversion, and high operating costs of energy storage systems, achieving strong fluidity and low compressibility. , the effect of high heat transfer efficiency

Active Publication Date: 2022-08-05
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The amino thermochemical energy storage system is simple and miniaturized, and can effectively collect, store, transport, and convert solar energy without worrying about the transient nature of solar radiation, and the energy produced by the synthesis reaction is of high quality, but NH 3 / N 2 / H 2 There are still some problems to be solved in the practical application of thermochemical energy storage systems, such as H 2 and N 2 The problem of long-term safe storage; the reaction is operated under high temperature, high pressure, and catalyst, the reaction conditions are relatively harsh, and the operation cost of the energy storage system is high; the incomplete conversion of the reaction, etc.

Method used

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  • A system and process of hydrogen -based hydrogen -based hydrogen -based hydrogen -based hydrogen -based hydrogen -based hydrogen -based hydrogen -based hydrogenation of amino thermal chemical energy storage

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Experimental program
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Effect test

Embodiment 1

[0026] The direct solar radiation intensity is taken as 1kW / m 2 , the concentration ratio is 200, which aims to test the feasibility of the system under normal illumination and concentration conditions; the solar heat collector provides the heat required for the ammonia decomposition reaction in the endothermic reactor 2 and maintains the temperature of the reaction. To ensure the progress of the reaction, the length of the endothermic reactor 2 is 355mm and the diameter is 30mm; the liquid ammonia exchanges heat from the normal temperature pressure storage tank 4 to the first heat exchanger 3, and the temperature rises from the normal temperature to about 400 ℃ and then enters the endothermic Reactor 2, the ammonia decomposition reaction occurs in the endothermic reactor 2 to make the product N 2 , H 2 The temperature rises to about 700°C, then enters the first heat exchanger 3 for heat exchange, and finally is stored in the normal temperature and pressure storage tank 4; 2...

Embodiment 2

[0028] The liquid ammonia exchanges heat from the normal temperature pressure storage tank 4 to the first heat exchanger 3, and the temperature rises from the normal temperature to about 400 ° C and then enters the endothermic reactor 2, where the ammonia decomposition reaction occurs in the endothermic reactor 2 to make the product N 2 , H 2 The temperature rises to about 700°C, enters the first heat exchanger 3 for heat exchange, and is finally stored in the normal temperature and pressure storage tank 4; 2 , H 2 First enter the fifth heat exchanger 5 for heat exchange to raise the temperature from normal temperature to about 250°C, the total flow of the reaction gas is 4.25g / s, and then enter the second heat exchanger 6 for heat exchange to raise the temperature from 250°C to 630°C , and finally enter the adiabatic reactor 7 to produce ammonia synthesis reaction, the length of the adiabatic reactor is 115cm, and the length of the adiabatic reactor is 18mm directly. The li...

Embodiment 3

[0030] The liquid ammonia exchanges heat from the normal temperature pressure storage tank 4 to the first heat exchanger 3, and the temperature rises from the normal temperature to about 400 ° C and then enters the endothermic reactor 2, where the ammonia decomposition reaction occurs in the endothermic reactor 2 to make the product N 2 , H 2 The temperature rises to about 700°C, enters the first heat exchanger 3 for heat exchange, and is finally stored in the normal temperature and pressure storage tank 4; 2 , H 2 First enter the fifth heat exchanger 5 for heat exchange to raise the temperature from normal temperature to about 250°C, the total flow rate of the reaction gas is 4.36g / s, and then enter the second heat exchanger 6 for heat exchange to raise the temperature from 200°C to 620°C , and finally enter the adiabatic reactor 7 to generate ammonia synthesis reaction, the length of the adiabatic reactor is 120cm, and the length of the adiabatic reactor is 20mm directly. ...

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Abstract

The invention discloses a system and a process for coupling hydrogen production by solar high-temperature electrolysis of water based on amino thermochemical energy storage, and belongs to the technical field of solar photothermal electrolysis of water for hydrogen production. The system integrates an amino thermochemical energy storage unit, recompressed S‑CO 2 The Brayton cycle unit and the high-temperature electrolysis water hydrogen production unit connect and synergize each unit through multiple heat exchangers. The amino thermochemical energy storage unit absorbs the temperature of solar energy decomposition and ammonia synthesis to release heat energy. On this basis, for integrated Due to the waste heat caused by various energy transfer processes in the solar hydrogen production system, a deep waste heat recovery method of the system is proposed, which realizes the synergistic optimization and complementary process of solar energy and chemical energy, and the target energy utilization rate can reach 27%. The new path is of great significance to the utilization and storage of solar energy.

Description

technical field [0001] The invention belongs to the technical field of solar photothermal electrolysis of water for hydrogen production, and in particular relates to a system and a process for coupling hydrogen production by solar high-temperature electrolysis of water based on amino thermochemical energy storage. Background technique [0002] Solar energy is a clean and renewable energy. Among all renewable energy sources, solar energy is the most widely distributed and the easiest to obtain. Due to the shortcomings of solar energy with intermittent, low density, instability, and difficulty in continuous supply, there are still many problems to be solved in the wide application of pure solar thermal power generation. It is the key to solar thermal power generation technology. Solid oxide fuel cell is an ideal fuel cell. The difficulty of solid oxide fuel cell technology is that it works continuously at high temperature, but the high temperature waste heat discharged from s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B9/50C25B1/04C25B1/55C25B9/67C25B15/021
CPCC25B9/00C25B1/04C25B15/02Y02P20/10Y02P20/129
Inventor 陈晨夏起赵建国冯帅明孔明民钱挺杜伟何兴
Owner ZHEJIANG UNIV OF TECH
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