CO2 Mineralization in Industrial Waste Suspensions With Feedback Control
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Solution Overview
Problem
Current methods lack efficient and economically viable solutions for storing large volumes of carbon dioxide emissions from industrial processes in industrial waste suspensions, which are typically water-based and contain cement minerals, sludges, and slags, to meet the global reduction targets set by the Paris Climate Agreement.
Innovation Solution
A method and system for storing carbon dioxide in industrial waste suspensions by mineralizing it into carbonate and bicarbonate precipitates using a control unit to manage the pH and gas flow, ensuring only the amount that can be mineralized is supplied, and utilizing a bypass system for continuous or repetitive mineralization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If carbon dioxide is supplied continuously into industrial waste suspension to increase storage capacity, then the amount of stored carbon dioxide increases, but excessive gas discharge occurs reducing efficiency
Solution Approach 1:
The system employs sensors to monitor the mineralization process and provides feedback to the control unit. The control unit adjusts the carbon dioxide supply rate based on real-time measurements of pH, alkalinity, and mineralization progress, ensuring optimal storage efficiency and preventing excessive gas discharge.
Solution Approach 2:
The carbon dioxide supply rate is made dynamic rather than constant. The system continuously adapts the supply parameters based on the current state of the waste suspension, adjusting flow rates and injection timing to match the mineralization capacity at each moment, thereby maximizing storage while minimizing waste.
2Quantity of substance
If industrial waste suspension is used as carbon dioxide storage medium to meet global reduction targets, then storage capacity is achieved, but process complexity increases requiring continuous monitoring and control
Solution Approach 1:
The control unit performs multiple functions: it monitors pH, alkalinity, and mineralization progress; calculates storage capacity; adjusts carbon dioxide supply rates; and controls injection timing. This multi-functionality consolidates what could be separate complex systems into a single integrated control platform.
Solution Approach 2:
The system utilizes the inherent chemical properties of the industrial waste suspension (pH, alkalinity, mineral content) as self-indicating parameters for the mineralization process. These natural properties serve as built-in sensors that reduce the need for additional monitoring equipment while providing sufficient data for control decisions.
3Reliability
If carbon dioxide mineralization is performed to store carbon dioxide in industrial waste suspension, then carbon dioxide is converted to stable carbonate minerals, but the process requires precise pH control and extended processing time
Solution Approach 1:
The system performs preliminary assessment of the waste suspension's mineralization capacity before initiating carbon dioxide injection. By pre-evaluating pH, alkalinity, and mineral content, the system can optimize injection parameters from the start, reducing the overall processing time while ensuring reliable mineralization.
Solution Approach 2:
The mineralization process is maintained continuously rather than in batch operations. The control unit ensures uninterrupted carbon dioxide supply at optimized rates, keeping the mineralization reaction continuously active. This continuous operation increases efficiency and reduces total processing time compared to intermittent or batch processes.
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
The method and system enable effective and efficient storage of carbon dioxide in industrial waste suspensions, optimizing mineralization rates and reducing excessive gas discharge, thereby meeting storage demands while maintaining economic efficiency.
Implementation Method 1
carbon dioxide undergoes a chemical reaction, whereby carbon dioxide is mineralized. E.g. by reaction with the suspended cement minerals and/or hydroxyl ions of the industrial waste suspension. The mineralization of carbon dioxide results in the formation of carbonate and/or bicarbonate containing precipitate.
Implementation Method 2
The water of the aqueous solution may thereby be in phase equilibrium with the solid cement minerals. In some embodiments, the industrial waste suspensions may comprise calcium ions, which are at least partially dissolved in the aqueous solution.
Implementation Method 3
The mineralization of carbon dioxide results in the formation of carbonate and/or bicarbonate containing precipitate. The precipitate may preferably comprise calcium and particularly be at least partly calcium carbonate.
Data Source
AI summary
The disclosure relates to a method and a system for storing carbon dioxide in an industrial waste suspension. The method includes the following method steps: a. Providing a collection container containing the industrial waste suspension; b. Supplying of a volume flow of gas comprising carbon dioxide into the industrial waste suspension such that the industrial waste suspension is enriched with carbon dioxide, wherein at least part of the carbon dioxide is mineralized in the industrial waste suspension; c. Determining a loss of carbon dioxide from the carbon dioxide enriched industrial waste suspension; d. Determining an amount of mineralized carbon dioxide from the supplied carbon dioxide and the loss of carbon dioxide.