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

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...

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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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