Magnesium Hydroxide Pellets for CO2 Sequestration
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Solution Overview
Problem
Existing direct air capture and sequestration (DACCS) systems face challenges such as high energy consumption, low net CO2 capture efficiency, significant operational costs, complex infrastructure, and limited scalability due to slow reaction rates and incompatibility with ambient atmospheric conditions.
Innovation Solution
A method and apparatus using magnesium hydroxide pellets to react with CO2 in ambient air to form magnesium carbonates, employing a reactor system with structured powder bodies or pellets to enhance CO2 sequestration efficiency and reduce energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional mineralization processes are used to react CO2 with alkaline minerals, then permanent CO2 storage in solid form is achieved, but reaction rates are slow and energy requirements are high
Solution Approach 1:
The patent changes the physical form of the mineral from bulk solid to nanoscale particles, fundamentally altering the reaction parameters. This size reduction increases the surface area to volume ratio, enabling faster reaction rates while maintaining the permanent storage capability through continued mineralization reaction.
Solution Approach 2:
The patent utilizes porous nanoscale mineral structures that provide high surface area for CO2 reaction while maintaining structural integrity for permanent storage. The porous nature of the nanomaterials allows efficient gas diffusion and rapid mineralization without requiring large energy inputs.
2Reliability
If conventional mineralization processes are used, then permanent CO2 storage is achieved, but energy requirements are high
Solution Approach 1:
The patent changes the mineral particle size to nanoscale, which fundamentally alters the energy requirements. The high surface area to volume ratio of nanomaterials enables the mineralization reaction to proceed rapidly at ambient temperatures, eliminating the need for high energy inputs required by conventional bulk mineral processes.
Solution Approach 2:
The patent replaces high-energy thermal or mechanical systems with a chemical surface-area-driven process. The nanoscale mineral particles react with CO2 through enhanced surface chemistry rather than requiring high-temperature heating or significant mechanical energy input, achieving permanent storage with minimal energy consumption.
3Reliability
If existing DACCS systems are used, then CO2 capture and storage is achieved, but infrastructure complexity and operational costs are significant
Solution Approach 1:
The patent extracts the mineralization reaction from complex industrial-scale infrastructure and implements it through simple, modular units that can be deployed in various configurations. The nanomaterial-based system eliminates the need for complex processing equipment, reducing infrastructure requirements while maintaining reliable CO2 capture and storage.
Solution Approach 2:
The patent employs inexpensive nanoscale mineral particles that can be easily replaced or regenerated, eliminating the need for expensive, complex infrastructure. The simple, low-cost nature of the nanomaterial system reduces operational costs and infrastructure requirements compared to conventional DACCS systems.
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 achieves higher CO2 capture rates, lower operational costs, and greater energy efficiency, with superior scalability and compatibility with atmospheric conditions, providing more permanent CO2 storage and reduced infrastructure requirements.
Implementation Method 1
at least a portion of the carbon dioxide in the first feedstock reacts with the one or more minerals in the second feedstock to form a first output including one or more carbonate minerals
Data Source
AI summary
A method for sequestering carbon dioxide includes contacting a first feedstock that is a gaseous feedstock including carbon dioxide with a second feedstock comprising one or more minerals, such that at least a portion of the carbon dioxide in the first feedstock reacts with the one or more minerals in the second feedstock to form a first output including one or more carbonate minerals and a second output that is a gaseous output having a lower concentration of carbon dioxide than a concentration of carbon dioxide in the first feedstock.