CO2 Capture from Flue Gas for Agricultural Use
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Solution Overview
Problem
Current methods for capturing carbon dioxide from flue gas are complex, energy-intensive, and costly, and often result in the venting of billions of tons of clean usable CO2 into the atmosphere, contributing to global warming, with existing systems being more greenhouse gas contributors rather than solutions.
Innovation Solution
A system that extracts, cools, and dilutes CO2 from flue gas, then distributes it to agricultural fields to promote plant growth and productivity, utilizing a network of extraction devices, cooling systems, and distribution arrays to create a beneficial CO2 concentration for crops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional CO2 capture systems are used to capture carbon dioxide from flue gas, then CO2 capture is achieved, but the systems become complex, energy intensive, and costly
Solution Approach 1:
The patent extracts CO2 directly from flue gas using absorption towers with amine solutions, separating the CO2 capture function from complex purification systems. The absorbed CO2 is then desorbed in a stripper column, providing a straightforward extraction-based capture mechanism that avoids the complexity of conventional multi-stage separation systems
Solution Approach 2:
The system serves multiple functions: capturing CO2 from flue gas, purifying it through a simple absorption-desorption cycle, and directly injecting it into oil wells for enhanced oil recovery. This multi-functionality eliminates the need for separate purification and storage infrastructure, reducing overall system complexity
2Quantity of substance
If conventional CO2 capture systems are used to capture carbon dioxide from flue gas, then CO2 capture is achieved, but energy consumption increases
Solution Approach 1:
The patent changes the chemical parameters of the absorption medium by using amine solutions that can be regenerated at lower temperatures compared to conventional solvents. The desorption process in the stripper column operates at moderate temperatures, significantly reducing the energy input required for CO2 release compared to high-temperature thermal decomposition methods
Solution Approach 2:
The system converts the harmful CO2 emissions into a beneficial resource for enhanced oil recovery. The CO2 that would otherwise require energy-intensive permanent storage is instead utilized for oil extraction, turning a waste product into a valuable commodity and reducing the overall energy burden of the capture system
3Quantity of substance
If conventional CO2 capture systems are used to capture carbon dioxide from flue gas, then CO2 capture is achieved, but costs increase
Solution Approach 1:
The system uses readily available amine solutions that can be regenerated and reused multiple times without significant degradation. The absorption and desorption cycles are self-sustaining, with the rich amine solution being continuously regenerated in the stripper column, eliminating the need for frequent solvent replacement and reducing operational costs
Solution Approach 2:
The patent merges the CO2 capture system with enhanced oil recovery operations, where the captured CO2 is directly injected into oil wells. This integration eliminates the need for separate CO2 storage facilities and transportation infrastructure, significantly reducing capital and operational costs associated with conventional sequestration projects
4Device complexity
If flue gas is vented to atmosphere, then no capture infrastructure is needed, but greenhouse gas emissions increase
Solution Approach 1:
The patent converts the harmful greenhouse gas emissions into a beneficial resource for enhanced oil recovery. By injecting the captured CO2 into oil wells, the system both reduces atmospheric emissions and enhances oil production, transforming an environmental problem into an economic opportunity
Solution Approach 2:
Instead of discarding CO2 emissions to the atmosphere, the system recovers the CO2 through absorption, purifies it, and reinjects it into oil reservoirs. This recovery approach prevents greenhouse gas emissions while utilizing the CO2 for productive purposes, eliminating the need for complex permanent storage infrastructure
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 captures and utilizes CO2, reducing greenhouse gas emissions while enhancing crop yields and productivity, making the captured CO2 a valuable commodity rather than a waste product.
Implementation Method 1
cooling the flue gas stream to a temperature sufficient to condense water vapor from the stream
Implementation Method 2
absorption, adsorption, cryogenic distillation, and membrane separation
Data Source
AI summary
The flue gas extraction system provides extraction, collection, dilution, cooling, and distribution of flue gas from a vent stack of a stationary flue gas generator. The collected flue gas is processed through the system to achieve optimal temperature, pressure, flowrate, and water content for application to plants for increasing plant productivity and sequestering the carbon dioxide. The processed flue gas may be enriched with additional carbon dioxide and/or have nutrients added to it to realize a gas concentration which, when applied to plants, promotes the growth, health and productivity of the plants. Application of carbon dioxide may be supplemented by providing additional components to the plants which maintain a level of fertilization and irrigation suitable for the increased biomass and water utilization efficiency of the plants resulting from the increased intake of carbon dioxide.