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A method of desalination using a flow battery and its application

A fluid battery, intermediate fluid technology, applied in the field of desalination, can solve problems such as poor desalination effect

Active Publication Date: 2020-10-27
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In flow batteries, there are currently a small number of reports using inorganic active materials as positive and negative electrode materials, and their desalination effect is not good.

Method used

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  • A method of desalination using a flow battery and its application
  • A method of desalination using a flow battery and its application
  • A method of desalination using a flow battery and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] (1) First cut the carbon paper, the homogeneous anion exchange membrane with quaternary amine groups and the homogeneous cation exchange membrane with sulfonic acid groups into a square of 11×11 cm, which is the same as the mold size of the flow battery device (11×11 ×1cm), and then punch holes in the carbon paper and the anion and cation exchange membranes respectively, so that the devices can be fixed with screws, which is beneficial to maintain the pressure during the reaction and prevent the materials from contaminating each other. Then put the cut carbon paper into a 1000ml beaker, pour 150ml of 4% (w / w) hydrochloric acid into it and ultrasonicate for 5min, the ultrasonic power is 200W. Then pour off the hydrochloric acid, rinse with deionized water, and then pour 150ml of absolute ethanol into the same ultrasonic wave for 5min (power 200W). Finally, pour out the absolute ethanol, rinse with deionized water, and then use deionized water to sonicate for 5 minutes (p...

Embodiment 2

[0083] (1) First cut the carbon paper, the homogeneous anion exchange membrane with quaternary amine groups and the homogeneous cation exchange membrane with sulfonic acid groups into a square of 11×11 cm, which is the same as the mold size of the flow battery device (11×11 ×1cm), and then punch holes in the carbon paper and the anion and cation exchange membranes respectively, so that the devices can be fixed with screws, which is beneficial to maintain the pressure during the reaction and prevent the materials from contaminating each other. Then put the cut carbon paper into a 1000ml beaker, pour 150ml of 4.5% (w / w) hydrochloric acid into it and sonicate it for 10min with a power of 150W. Then pour off the hydrochloric acid, rinse with deionized water, and then pour 150ml of absolute ethanol into the same ultrasonic wave for 10min (power 150W). Finally, pour out the absolute ethanol, rinse with deionized water, and then use deionized water to sonicate for 10 minutes (power 1...

Embodiment 3

[0090] (1) First cut the carbon paper, the homogeneous anion exchange membrane with quaternary amine groups and the homogeneous cation exchange membrane with sulfonic acid groups into a square of 11×11 cm, which is the same as the mold size of the flow battery device (11×11 ×1cm), and then punch holes in the carbon paper and the anion and cation exchange membranes respectively, so that the devices can be fixed with screws, which is beneficial to maintain the pressure during the reaction and prevent the materials from contaminating each other. Then put the cut carbon paper into a 1000ml beaker, pour 150ml of 5% (w / w) hydrochloric acid into it and ultrasonicate for 15min, the ultrasonic power is 100W. Then pour off the hydrochloric acid, rinse with deionized water, and then pour 150ml of absolute ethanol into the same ultrasonic wave for 15min (power 100W). Finally, pour out the absolute ethanol, rinse with deionized water, and then use deionized water to sonicate for 15 minutes...

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Abstract

The invention discloses a method for removing salt by using a fluid battery and application thereof. According to the method, salt removal is performed by a salt-removing fluid battery device, whereinthe salt-removing fluid battery device uses a positive active material as a positive electrode of the fluid battery, a negative active material as a negative electrode of the fluid battery and a saltsolution as an intermediate fluid electrolyte of the fluid battery. According to the invention, organic or inorganic active materials are used as the positive and negative electrode materials of thefluid battery, a salt-removing fluid battery is built in a fixed order, and the salt removing purpose is achieved through charging and discharging; during charging, through respective redox reactionsof the organic active positive and negative electrode materials, under an interfacial effect of an ion exchange membrane, electrodialysis is coupled to remove anions and cations in the salt solution,so that the purposes of removing the salt and removing other ions are achieved. The salt-removing fluid battery used in the invention is simple, low in cost and environment-friendly, shows excellent electrochemical performance, good cycle stability and salt removing capacity, and is applicable to the field of seawater salt removal and the like.

Description

technical field [0001] The invention belongs to the technical field of desalination, and in particular relates to a method for desalting by using a flow battery and an application thereof. Background technique [0002] In recent years, with the development of the times, the scarcity of drinking water and the energy crisis are two major global problems besides food, which are related to the survival of all human beings. The main causes of this problem are population growth, drastic climate change and environmental pollution, etc. These reasons will also exist in the next few decades. In order to solve the shortage of fresh water resources and the removal of toxic ions in water, desalination of seawater has become the most important task, the main difficulty lies in the removal of ions in seawater or aqueous solution. Because seawater resources are not limited. Technological advances have made large-scale desalination a reality for increasing the global freshwater supply. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/42C02F1/461C02F1/467H01M6/34
CPCC02F1/42C02F1/46109C02F1/4672C02F1/4676H01M6/34
Inventor 陈福明梁茜侯贤华
Owner SOUTH CHINA NORMAL UNIVERSITY
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