Gas-Separation Reactor Pre-Treatment for Temperature and Particle Control
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Solution Overview
Problem
Existing direct air capture (DAC) processes face challenges in efficiently operating at varying ambient temperatures and adverse environmental conditions, such as icing and reduced efficiency due to high or low temperatures, and require large air volumes, leading to increased energy consumption and potential clogging from particles.
Innovation Solution
A reactor system with a gas mixture pre-treatment device that includes a heat exchanger and an electrostatic separator to regulate temperature and remove particles, using a loop circuit with seawater or ground contact to maintain optimal adsorption conditions and a modular design for easy assembly and disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If large volumes of air are passed through the capture system to extract CO2, then the CO2 extraction efficiency is improved, but the energy consumption increases
Solution Approach 1:
The system performs preliminary heating or cooling of the air stream before it enters the adsorber to optimize adsorption conditions. This pre-treatment ensures that the air is at the optimal temperature range for CO2 adsorption, thereby improving extraction efficiency without requiring excessive air volumes and reducing the overall energy consumption of the system.
2Adaptability or versatility
If ambient air at low temperatures (below 0°C) is used, then the system can operate in cold climates, but the risk of icing of the separator increases
Solution Approach 1:
The system applies preliminary heating to the ambient air before it enters the separator and adsorber components. This pre-heating action raises the air temperature above the dew point and freezing point, eliminating the risk of icing while maintaining the ability to operate in cold climates. The heating is controlled to provide only the necessary temperature increase.
3Adaptability or versatility
If ambient air at high temperatures (above 30°C) is used, then the system can operate in hot climates, but the efficiency of the adsorption process is reduced
Solution Approach 1:
The system performs preliminary cooling of the hot ambient air before it enters the adsorber. This pre-cooling action reduces the air temperature to the optimal range for adsorption (below 30°C), thereby restoring adsorption efficiency while maintaining the ability to operate in hot climates. The cooling is achieved through heat exchange with a cooler fluid or ambient environment.
4Adaptability or versatility
If particles are present in the air stream, then the system can handle real-world air quality conditions, but clogging of the separator occurs
Solution Approach 1:
The system extracts and removes particles from the air stream using a particle separator or filter before the air enters the main separator and adsorber. This removal action prevents particles from causing clogging while allowing the system to continue handling air with typical real-world particle content. The separated particles are discharged separately from the processed air stream.
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 ensures efficient operation across varying temperatures and adverse conditions, minimizing energy consumption and preventing clogging, thereby extending the service life and efficiency of the DAC reactor.
Implementation Method 1
the heat exchanger has a heat transfer surface for transmitting heat from the loop circuit to the gas mixture or from the gas mixture to the loop circuit
Implementation Method 2
an adsorber structure for capturing the gaseous components from the gas mixture
Implementation Method 3
the loop circuit is in contact with ground, groundwater, or seawater to extract or dissipate heat
Data Source
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AI summary
A reactor system comprises a reactor for separating gaseous components from a gas mixture in an adsorption mode. The reactor comprises a housing having an inlet portion and an outlet portion. The reactor further comprises an adsorber structure for capturing the gaseous components from the gas mixture. The adsorber structure is positioned in the housing between the inlet portion and the outlet portion. The reactor further comprises a blower for drawing the gas mixture from the inlet portion through the adsorber structure towards the outlet portion. The reactor system further comprises a gas mixture pre-treatment device for treating the gas mixture before entering the adsorber structure. The gas mixture pre-treatment device is arranged upstream of the inlet portion in flow direction of the gas mixture. The gas mixture pre-treatment device includes a heat exchanger for heating and/or cooling the gas mixture prior to entering the adsorber structure. The heat exchanger is connected to a loop circuit containing a carrier fluid. The loop circuit is in fluid communication with a pump for circulating the fluid within the loop circuit. The loop circuit is in contact with ground, groundwater, or seawater to extract or dissipate heat. The heat exchanger has a heat transfer surface for transmitting heat from the loop circuit to the gas mixture or from the gas mixture to the loop circuit.