Method for membrane electrolysis of mineralized CO2 co-produced strong acid

A technology of membrane electrolysis and strong acid, applied in electrolysis process, electrolysis components, etc., can solve the problems of high energy consumption and long process flow, and achieve the effect of low energy consumption and simple process

Inactive Publication Date: 2013-03-20
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For existing CO 2 Insufficiency of mineralization technology, the present invention adopts calcium, magnesium salts such as soluble magnesium sulfate, magnesium nitrate, calcium nitrate as raw material, proposes a kind of can realize CO2 under normal temperature and pressure. 2 High-efficiency mineralization and co-production of strong acids such as sulfuric acid and nitric acid with high added value to solve the existing CO 2 Mineralization utilization methods have problems such as long process flow and high energy consumption

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  • Method for membrane electrolysis of mineralized CO2 co-produced strong acid
  • Method for membrane electrolysis of mineralized CO2 co-produced strong acid
  • Method for membrane electrolysis of mineralized CO2 co-produced strong acid

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Embodiment 1

[0020] The mineralization process of the present embodiment is as attached figure 1 shown. The electrolytic cell is divided into positive and negative areas by an anion exchange membrane 2 that only allows anion to pass through but can prevent cation from passing through. Add 0.2 mol / L sulfuric acid solution to the electrolytic cell in the positive electrode area as the positive electrode electrolyte, and add 0.5 mol / L sodium sulfate solution to the electrolytic cell in the negative electrode area as the negative electrode electrolyte. The gas diffusion electrode 1 is used as the positive electrode, and the platinum electrode 3 is used as the negative electrode. Add 10g of magnesium sulfate heptahydrate into the negative electrode electrolyte, and the CO bubbled into the bottom of the electrolytic cell in the negative electrode area 2 The flow rate is 20 ml / min, the hydrogen gas generated by the negative electrode is collected and enters the buffer tank 4, and the hydrogen g...

Embodiment 2

[0022] The mineralization process of the present embodiment is as attached figure 2 shown. The electrolytic cell is divided into positive and negative areas by an anion exchange membrane 2 that only allows anion to pass through but can prevent cation from passing through. Add 0.1 mol / L nitric acid solution to the electrolytic cell in the positive electrode area as the positive electrode electrolyte, and add 0.7 mol / L sodium nitrate solution to the electrolytic cell in the negative electrode area as the negative electrode electrolyte. The gas diffusion electrode 1 is used as the positive electrode, and the platinum electrode 3 is used as the negative electrode. Weigh 5g of calcium nitrate and add it to the electrolyte in the negative electrode area, and the CO bubbled into the bottom of the electrolytic cell in the negative electrode area 2The flow rate is 20 ml / min, the hydrogen generated by the negative electrode is collected and entered into the buffer tank 4, the hydroge...

Embodiment 3

[0024] The mineralization process of the present embodiment is as attached image 3 shown. The electrolytic cell is divided into positive and negative areas by an anion exchange membrane 2 that only allows anion to pass through but can prevent cation from passing through. Add 0.1 mol / L magnesium nitrate solution to the electrolytic cell in the positive electrode area as the positive electrode electrolyte, and add 0.05 mol / L solution to the electrolytic cell in the negative electrode area as the negative electrode electrolyte. A metal platinum electrode 5 is used as the positive electrode, and a metal nickel electrode 3 is used as the negative electrode. Weigh 5g of magnesium nitrate and add it to the negative electrode electrolyte, and the CO bubbled into the bottom of the electrolytic cell in the negative electrode area 2 The flow rate was 20 ml / min, and the electrolysis reaction was carried out at a voltage of 4.1 V for 1 h. The negative electrode solution was heated at 1...

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Abstract

The invention discloses a method for membrane electrolysis of mineralized CO2 co-produced strong acid. The method comprises the following steps of: placing an anion-exchange membrane in an electrolytic bath to ensure that the electrolytic bath is separated into a positive area and a negative area; adding a mineralized raw material and a negative electrode solution into the negative area, charging carbon dioxide gas into the negative area at the same time; adding a positive electrode solution into the positive area; and applying a direct current supply between a positive electrode and a negative electrode, wherein the negative electrode reduces hydrogen ions in the negative electrode solution into hydrogen gas to ensure that the carbon dioxide in the solution is transformed into carbonate radicals or bicarbonate radicals which react with positive ions in the mineralized raw material to realize the mineralization of the CO2 and obtain a mineralized product, and negative ions in the mineralized raw material permeate through the anion-exchange membrane and enter the positive area under the action of current to combine with the hydrogen ions generated by the positive electrode so as to generate the strong acid. The method has the characteristics operation at normal temperature and pressure, simple process, low energy consumption and suitability for industrial production.

Description

technical field [0001] The present invention relates to CO 2 Mineralized emission reduction co-production of chemical products technology, more specifically, involves a mineralized CO 2 Membrane electrolysis method for co-production of strong acid. Background technique [0002] The earth's climate is mainly dominated by natural factors, but since the Industrial Revolution, the emissions from human activities, in the form of CO 2 Greenhouse gases have become the main factors affecting global climate change. China's total carbon emissions in 2009 reached 6.88 billion tons, accounting for about 23.7% of the world's total carbon emissions, an increase of 206.5% compared to 1990, and China has become the world's largest carbon emitter. It is estimated that the average annual growth rate of carbon dioxide emissions will be 5.4% before 2015, and 3.3% between 2015 and 2030. China's emissions will reach 11.4 billion tons in 2030. Limiting greenhouse gas emissions has become a glob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/22
Inventor 谢和平王昱飞刘涛江文
Owner SICHUAN UNIV
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