Automated Catalytic Direct Air CO2 Capture System
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Solution Overview
Problem
Current industrial methods for carbon dioxide removal from air are inefficient and not scalable, as they are primarily designed for high concentrations found in manufacturing plants, whereas ambient air contains CO2 at much lower concentrations, making direct capture from air challenging.
Innovation Solution
A fully automated catalytic system using M2+CO32− in a liquid solvent with packing materials and multi-stage reactors for efficient CO2 capture from air, where the base medium is regenerated and reused, incorporating catalysts and sensors for automation and scalability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional amine or carbonate methods are used for CO2 removal, then high concentration CO2 (15-50 wt%) can be effectively removed from flue gasses, but the method is not suitable for direct air capture where CO2 concentration is limited to 200-1000 ppm
Solution Approach 1:
The patent employs temperature swing adsorption to change the operational parameters of the sorbent material. At lower temperatures (ambient conditions), the sorbent selectively captures CO2 from air at low concentrations. At higher temperatures (elevated conditions), the captured CO2 is desorbed and concentrated. This parameter change enables the same system to effectively handle both low-concentration direct air capture and high-concentration flue gas treatment.
2Adaptability or versatility
If direct air capture is implemented with low CO2 concentration (200-1000 ppm), then scalable CO2 removal from ambient air is achieved, but the processing volume and system size increase significantly compared to high concentration sources
Solution Approach 1:
The patent utilizes phase transition through temperature swing to concentrate CO2 from low-concentration air. The sorbent material undergoes a phase change in its CO2 binding capability when heated, releasing concentrated CO2 from the captured atmosphere. This allows the system to process large volumes of air at ambient conditions and output a much smaller volume of concentrated CO2, dramatically reducing the required processing volume for the same CO2 removal quantity.
Solution Approach 2:
The patent uses modular sorbent beds that can be replicated and arranged in series or parallel configurations. Each module captures and concentrates CO2 independently, then the concentrated streams are combined. This modular copying approach allows scalable deployment for direct air capture while maintaining compact system volume through efficient parallel processing.
3Device complexity
If manual operation and monitoring are used for CO2 capture systems, then system complexity is reduced, but automation capability and scalability are limited
Solution Approach 1:
The patent incorporates sensors and control systems that continuously monitor CO2 concentration, temperature, and flow rates throughout the air capture and temperature swing process. This feedback enables automatic adjustment of operational parameters, regeneration timing, and system configuration optimization. The automated control based on real-time feedback allows the system to maintain optimal performance while scaling to different sizes and applications without requiring manual intervention.
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 system achieves high CO2 conversion and selectivity, enabling scalable and efficient direct capture from air, with the captured CO2 being usable in various applications such as refrigerants, cements, and chemical production, while minimizing processing volume.
Implementation Method 1
a base medium is circulated to contact ambient air to capture carbon dioxide
Implementation Method 2
M2+CO32− in a liquid solvent including water, alcohols, and glycols solution
Implementation Method 3
the carbon dioxide-rich base medium is heated to desorb the carbon dioxide
Implementation Method 4
the carbon dioxide-rich base medium is heated to desorb the carbon dioxide
Implementation Method 5
both absorption and desorption catalysts to capture CO2 directly from the air at high conversions and selectivity
Data Source
AI summary
An efficient low-energy carbon dioxide removal system comprises an automated air mover equipped with sensing devices to measure flow rate, volume, level, pressure, temperature and concentration. Packing materials and air-liquid distributors are used in a multi-stage catalytic reactor. The multi-stage catalytic reactor processes ambient air and generates pure carbon dioxide gas and generates exhausted gas released to ambient air. In operation, air contacts the base solution in the presence of a catalyst via the air mover, distributor, and packing materials. The air reacts with the base solution thereby generating a base solution having carbon dioxide and generating exhaust (absorption reaction). Next, the exhaust is released from the reactor. Next, a catalyst is added, heat is applied to the base solution having carbon dioxide thereby generating carbon dioxide and generating a base solution without carbon dioxide (desorption reaction).