Carbonate Salt Production via Alkaline Mist Atomization
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Solution Overview
Problem
Existing methods for producing carbonate salts from exhaust gas carbon dioxide are inefficient due to difficulties in gas-liquid contact processes, which hinder the effective absorption of carbon dioxide in sodium hydroxide solutions.
Innovation Solution
The method involves forming an aqueous alkaline solution mist using an atomizer, mixing it with exhaust gas to absorb carbon dioxide, and separating the resulting carbonate salt mist, utilizing ultrasonic or static electricity atomization techniques to enhance the reaction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If gas-liquid contact procedure is used to absorb carbon dioxide in sodium hydroxide solution, then the reaction can proceed, but the production efficiency of sodium carbonate is low
Solution Approach 1:
The patent segments the liquid sodium hydroxide into fine droplets or mist particles, creating a dispersed phase that dramatically increases the total surface area for gas-liquid contact. This segmentation of the liquid phase allows exhaust gas carbon dioxide to contact the sodium hydroxide more effectively, resolving the contradiction between achieving adequate reaction contact and maintaining high production efficiency.
Solution Approach 2:
The patent transitions from conventional liquid-phase contact to a mist or aerosol state, effectively moving the liquid from a continuous phase to a dispersed particulate phase. This dimensional change in the physical state of sodium hydroxide enables vastly improved mass transfer coefficients and reaction efficiency while maintaining the chemical reaction pathway.
2Area of moving object
If conventional liquid absorption method is used, then carbon dioxide can be absorbed, but the surface area for reaction is insufficient
Solution Approach 1:
By dividing the liquid sodium hydroxide into numerous fine droplets or mist particles, the patent increases the total surface area by orders of magnitude compared to bulk liquid absorption. This segmentation creates a vast interfacial area for carbon dioxide to contact and react with the hydroxide ions, directly resolving the contradiction between available surface area and reaction efficiency.
Solution Approach 2:
The patent changes the physical parameters of the sodium hydroxide from a continuous liquid phase to a dispersed mist phase, altering the surface area to volume ratio dramatically. This parameter change enables the system to achieve both high surface area for absorption and high reaction efficiency simultaneously.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach efficiently produces carbonate salts by increasing the surface area of the mist, allowing for rapid absorption of carbon dioxide and effective separation of carbonate salts from exhaust gas, thereby improving the production efficiency of carbonate salts like sodium and calcium carbonate.
Implementation Method 1
an atomizing step that forms an aqueous alkaline solution mist with an atomizer
Implementation Method 2
mixes exhaust gas with the aqueous alkaline solution mist produced in the atomizing step to absorb exhaust gas carbon dioxide in the mist
Implementation Method 3
combine mist positive ions with the carbon dioxide to form mist that contains carbonate salt
Implementation Method 4
a separating step that separates the mist that contains carbonate salt produced in the mixing step from exhaust gas
Data Source
AI summary
Carbonate salts are efficiently produced from carbon dioxide in exhaust gas. The method for producing carbonate salts includes an atomizing step that forms an aqueous alkaline solution mist with an atomizer; a mixing step that mixes exhaust gas with the aqueous alkaline solution mist produced in the atomizing step to absorb exhaust gas carbon dioxide in the mist and combine mist positive ions with the carbon dioxide to produce mist that contains carbonate salt; and a separating step that separates the mist that contains carbonate salt produced in the mixing step from exhaust gas.