Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for producing hydrogen through electrolysis of water vapor

A water vapor and hydrogen technology, applied in the electrolysis process, electrolysis components, electrodes, etc., can solve the problems of multi-energy, complex mass transfer and heat transfer process, difficult to start and stop quickly, etc., to reduce energy consumption, simplify electrolysis devices, improve The effect of electrolysis efficiency

Active Publication Date: 2020-02-14
CHNA ENERGY INVESTMENT CORP LTD +1
View PDF10 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the high working temperature of high-temperature solid oxide water vapor electrolysis hydrogen production in the prior art, which is difficult to start and stop quickly, and the high temperature (high calorific value water vapor) of heating water vapor to 500-800 ° C requires relatively high consumption. more energy; in the process of liquid water electrolysis, there are three phases of gas, liquid and solid in the electrolysis reaction interface, and the mass and heat transfer process is complicated; in the process of alkaline water electrolysis, bubbles are generated, which leads to the increase of electrolysis voltage, etc., providing a method that can effectively use 100 The waste heat steam with low calorific value at -200°C can meet the requirements of rapid start-up and stop. The electrolysis steam technology can simplify the electrolysis device, improve the electrolysis efficiency and reduce energy consumption.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for producing hydrogen through electrolysis of water vapor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 100g persulfonic acid resin solution (5wt%, purchased from DuPont Company, the same below) was stirred in a three-necked flask to make it uniformly dispersed, and then 20g zirconium nitrate solution (10wt%) was gradually added dropwise at room temperature (25° C.), Stir for 1 hour, after dispersing evenly, add it into a polytetrafluoroethylene mold plate to form a solution film, dry it in a vacuum oven at 80°C for 10 hours, take it out, put it in a 10M phosphoric acid solution, and keep it at 60°C for 24 hours, the film After taking it out, remove moisture in a vacuum oven at 80°C to obtain the desired composite cation exchange membrane of inorganic zirconium phosphate and perfluorosulfonic acid resin.

[0046] The ion exchange membrane adopts the above-mentioned cation exchange membrane, the cathode catalyst and the anode catalyst are both Pt, and 130°C water vapor is introduced, and a 2.2V DC voltage is applied, and the water vapor generates H under the action of the c...

Embodiment 2

[0048] Stir 100g of persulfonic acid resin solution (5wt%) in a three-necked flask to disperse it evenly, then gradually drop 1.5g of dimethylimidazolium hexafluorophosphate ionic liquid (purity>99%) at room temperature (25°C) Add it, stir for 1 hour, and disperse evenly, add it into a polytetrafluoroethylene mold plate to form a solution film, and dry it in a vacuum oven at 80°C for 10 hours to obtain the desired imidazole-based ionic liquid and perfluorosulfonic acid resin composite cation exchange membrane.

[0049] The ion exchange membrane adopts the above-mentioned cation exchange membrane, the cathode catalyst and the anode catalyst are both Pt, and 150°C water vapor is introduced, and a 2.2V DC voltage is applied, and the water vapor generates H under the action of the cathode catalyst. 2 , under the action of the anode catalyst to produce O 2 , energy consumption is 4.2kWh / Nm 3 .

Embodiment 3

[0051] In a three-necked flask, 10g of polybenzimidazole (purchased from Suzhou Pinyu Co., Ltd.) was dissolved in a dimethylacetamide solvent to form a solution (5wt%), stirred to disperse it evenly, and then at room temperature (25° C.) Gradually drop 8g of phosphoric acid solution (50wt%), stir for 1h, and disperse evenly, add it into a polytetrafluoroethylene mold to form a solution film, and dry it in a vacuum oven at 80°C for 10h to obtain the required phosphoric acid and polytetrafluoroethylene. Benmidazole composite cation exchange membrane.

[0052] The ion-exchange membrane adopts the above-mentioned cation-exchange composite membrane, the cathode catalyst and the anode catalyst are both Pt, and 200°C water vapor is introduced, and a 2.2V DC voltage is applied, and the water vapor generates H under the action of the cathode catalyst. 2 , under the action of the anode catalyst to produce O 2 , energy consumption is 3.8kWh / Nm 3 .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the field of hydrogen production through water electrolysis, and discloses a method for producing hydrogen through electrolysis of water vapor. The method comprises: under theaction of direct current, carrying out a reduction reaction on a cathode side to produce hydrogen, and carrying out an oxidation reaction on an anode side to produce oxygen, wherein the electrolyteson the anode side and the cathode side are water vapor with a temperature of 100-200 DEG C, the cathode side and the anode side are isolated by an electrode assembly, and the electrode assembly is anion exchange membrane with two side surfaces respectively coated with a cathode catalyst and an anode catalyst. According to the invention, by adopting the method, the low-heating-value waste heat steam with a temperature of 100-200 DEG C can be effectively utilized, the quick start-stop requirement can be met, the electrolysis device can be simplified, the electrolysis efficiency can be improved,and the energy consumption can be reduced.

Description

technical field [0001] The invention relates to the field of hydrogen production by electrolysis of water, in particular to a method for production of hydrogen by electrolysis of water vapor. Background technique [0002] In recent years, problems such as global warming, environmental pollution, and reduction of underground resources have become increasingly serious, and renewable energy at home and abroad has been vigorously developed. However, renewable energy is geographically unbalanced, and its output fluctuates greatly, and there is a limit to the transmission of electricity generated by natural energy to the general power system. In addition, the difference in weather and seasons will lead to fluctuations in the amount of electricity generated. Substantial changes. Therefore, hydrogen production by electrolysis of water has become a means of new energy storage and peak regulation. With the development of hydrogen energy, electrolysis of water to produce hydrogen is ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/10C25B9/10C25B13/08C25B11/06C25B11/08C25B9/23
CPCC25B13/08C25B11/04C25B1/04C25B9/73C25B9/23Y02P20/129Y02E60/36
Inventor 郭秀盈许壮何广利李先明缪平
Owner CHNA ENERGY INVESTMENT CORP LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com