High-purity hydrogen preparation method based on pressure swing adsorption

A pressure swing adsorption and hydrogen technology, which is applied in separation methods, chemical instruments and methods, and hydrogen separation through selective and reversible absorption, can solve the problems of low production efficiency and low hydrogen purity, and achieve improved production efficiency and purity. , the effect of enhancing activity

Pending Publication Date: 2022-06-07
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In actual work, the purity of hydrogen produced by existing hydrogen production equipment is low, and multiple removal of impurities is required to improve the purity of hydrogen, and its production efficiency is low

Method used

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  • High-purity hydrogen preparation method based on pressure swing adsorption
  • High-purity hydrogen preparation method based on pressure swing adsorption
  • High-purity hydrogen preparation method based on pressure swing adsorption

Examples

Experimental program
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Effect test

Embodiment 1

[0044] combine figure 1 As shown, a method for preparing high-purity hydrogen based on pressure swing adsorption includes the following steps:

[0045] S1, electrolyze water to produce hydrogen, electrolyze the aqueous solution in an electrolytic cell, generate oxygen and hydrogen after electrolysis, and store the oxygen in an oxygen storage device;

[0046] S2, gas-liquid separation, the hydrogen generated by electrolysis enters the hydrogen separator, and the gas-liquid separation is carried out under the action of gravity;

[0047] S3. Hydrogen cooling, using a hydrogen cooler to cool the hydrogen;

[0048] S4. Hydrogen water removal, using a hydrogen drop catcher to remove free water in the hydrogen;

[0049] S5. Deoxygenation of hydrogen, the hydrogen treated by dewatering enters the deaerator through the buffer tank, and the oxygen impurities in the hydrogen react under the action of the catalyst to generate water, so as to achieve the purpose of removing the oxygen im...

Embodiment 2

[0059] like Figure 2-5 As shown in the figure, a method for preparing high-purity hydrogen based on pressure swing adsorption includes: an electrolytic cell, wherein a KOH solution is contained in the electrolytic cell, an oxygen storage device is connected to the oxygen end of the electrolytic cell, and an oxygen storage device is connected to the oxygen end of the electrolytic cell. The hydrogen end is connected with a hydrogen separator, the hydrogen containing lye enters the hydrogen separator, and under the action of gravity, gas-liquid separation is realized, the hydrogen separator is connected with a hydrogen cooler, and the hydrogen is cooled by the hydrogen cooler. The hydrogen cooler is connected with a hydrogen drop catcher, the hydrogen drop catcher removes the free water in the hydrogen, the hydrogen drop catcher is connected with a hydrogen buffer tank, the hydrogen buffer is connected with a deaerator, and the deaerator is connected with a trace amount of water....

Embodiment 3

[0067] A method for preparing high-purity hydrogen based on pressure swing adsorption, comprising: an electrolytic cell, wherein a KOH solution is contained in the electrolytic cell, an oxygen storage device is connected to an oxygen end of the electrolytic cell, and a hydrogen end of the electrolytic cell is connected to There is a hydrogen separator, the hydrogen containing lye enters the hydrogen separator, and under the action of gravity, gas-liquid separation is realized, the hydrogen separator is connected with a hydrogen cooler, and the hydrogen is cooled by the hydrogen cooler, and the hydrogen cooler is A hydrogen drop catcher is connected, the hydrogen drop catcher removes the free water in the hydrogen, the hydrogen drop catcher is connected with a hydrogen buffer tank, and the hydrogen buffer is connected with a deaerator, and the deaerator is filtered by trace oxygen impurities. Under the action of the catalyst, the reaction generates water to achieve the purpose o...

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Abstract

The invention discloses a high-purity hydrogen preparation method based on pressure swing adsorption. The high-purity hydrogen preparation method comprises the following steps: S1, electrolyzing water to produce hydrogen; s2, gas-liquid separation is conducted, specifically, hydrogen generated through electrolysis enters a hydrogen separator, and gas-liquid separation is conducted; s3, hydrogen cooling, wherein hydrogen is cooled through a hydrogen cooler; s4, hydrogen water removal, wherein free water in hydrogen is removed through a hydrogen drop catcher; s5, hydrogen deoxygenation is conducted, specifically, hydrogen enters a deaerator through a buffer tank, and the purpose of removing oxygen impurities is achieved; s6, the hydrogen is dewatered again, and the deoxygenated hydrogen is cooled again through a hydrogen cooler; s7, hydrogen impurity removal: performing impurity removal on the hydrogen by using a PSA adsorption device to realize purification of the hydrogen; and S8, hydrogen collection: storing the hydrogen subjected to impurity removal into a hydrogen storage tank. The hydrogen is dewatered and deoxidized before being purified, and the hydrogen with lower purity is subjected to secondary pressure swing adsorption, so that the purity of the hydrogen is greatly improved, and the production efficiency of the hydrogen is improved.

Description

technical field [0001] The invention belongs to the technical field of hydrogen preparation, and in particular relates to a method for preparing high-purity hydrogen based on pressure swing adsorption. Background technique [0002] Hydrogen is one of the most ideal energy sources in the future. Hydrogen has the advantages of high efficiency, cleanliness, pollution-free, and renewable cycles. PSA technology is currently the main technical means for preparing hydrogen, and it is a new technology for gas adsorption and separation in the form of pressure swing adsorption. PSA technology is of great significance for the preparation of high-purity hydrogen. In practical work, the hydrogen produced by the existing hydrogen production equipment is of low purity, and multiple impurity removals are required to improve the purity of the hydrogen, and its production efficiency is low. SUMMARY OF THE INVENTION [0003] In view of the deficiencies in the prior art, the purpose of the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/50C01B3/56C01B3/58B01D53/053B01D53/26B01D53/46B01D53/86
CPCC01B3/508C01B3/506C01B3/58B01D53/053B01D53/8671B01D53/261Y02E60/36
Inventor 梁正王正阳仪得志陈源茂刘纪江丁远清
Owner SHANGHAI JIAO TONG UNIV
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