Containerized Enhanced Weathering Reactors for CO2-to-Bicarbonate Capture

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Solution Overview

Problem

Existing methods for enhanced weathering of minerals to sequester CO2 are costly and lack efficacy, safety, and verification strategies, particularly in non-tropical settings.

Innovation Solution

A method and system for enhanced weathering using containerized reactors with mineral feedstocks like metal silicates, carbonates, and oxides, which measure and control CO2 parameters, and adjust conditions to achieve significant CO2 sequestration by converting it to bicarbonate ions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If crushed minerals and rocks are applied to land or aquatic systems to enhance weathering, then CO2 sequestration is promoted, but the cost increases to $80-$180 per ton of captured CO2

Engineering Contradiction:

ImproveCO2 sequestration amountVSAvoidcost per ton of captured CO2

Core Design Contradiction:

Quantity of substanceVSEase of manufacture

Solution Approach 1:

The patent changes key parameters of the weathering process by using highly reactive mineral feedstocks (olivine, serpentine, talc) with specific particle size distributions (predominantly fine particles less than 10 micrometers) and controlling pH levels (maintaining pH greater than 8) to optimize dissolution rates. These parameter changes enable enhanced weathering to achieve effective CO2 sequestration at lower costs by improving reaction efficiency and mineral dissolution kinetics.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If crushed minerals are applied in tropical agricultural settings, then CO2 capture is enhanced, but efficacy and safety remain uncertain in various settings

Engineering Contradiction:

ImproveCO2 capture rateVSAvoidefficacy and safety in various settings

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent develops a universal enhanced weathering system that can operate in diverse settings beyond tropical agricultural environments. The system uses containerized reactors that can be deployed in various locations (freshwater systems, marine environments, wastewater treatment facilities) and processes multiple types of mineral feedstocks (olivine, serpentine, talc, carbonate minerals) to achieve reliable CO2 sequestration across different geographic and environmental conditions.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent implements monitoring and verification strategies including measuring pH levels, alkalinity, and mineral dissolution rates to ensure effective and safe operation. By continuously monitoring these parameters and adjusting operational conditions accordingly, the system maintains reliability and efficacy across various deployment settings while verifying actual CO2 sequestration performance.

Inventive Principle:

Principle #23Feedback

3Productivity

If natural chemical weathering is enhanced by crushing minerals into fine particles, then the weathering process is dramatically enhanced, but the complexity of the system increases

Engineering Contradiction:

Improveweathering process enhancementVSAvoidsystem complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent divides the enhanced weathering process into segmented, modular containerized reactors that can be independently operated and scaled. Each reactor contains specific mineral feedstocks and operates under controlled conditions, allowing the overall system to achieve high productivity through parallel processing while maintaining manageable complexity through modular design. This segmentation enables deployment in various settings without requiring complex integrated systems.

Inventive Principle:

Principle #1Segmentation

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 efficiently captures large quantities of CO2 from aqueous solutions, converting it to bicarbonate ions, demonstrating unexpected decreases in dissolved CO2 concentration, and potentially capturing over 1 gigaton of CO2 annually in the U.S. using wastewater treatment facilities.

Implementation Method 1

Natural chemical weathering of rocks results in the sequestration of approximately 1.1 billion tons of carbon dioxide (CO2) annually. By crushing minerals and/or rocks (e.g., silicates and/or carbonates) into fine particles and applying to land or aquatic systems, this natural process can be dramatically enhanced to promote consumption of atmospheric CO2 during mineral dissolution

Methodology Applied

Scientific EffectChemical weathering: Weathering

Implementation Method 2

promote consumption of atmospheric CO2 during mineral dissolution accompanied by a release of mineral dissolution products (e.g., alkalinity, Si, Ca, Mg, Fe, and Ni, inter alia)

Methodology Applied

Scientific EffectMineral dissolution: Solvation

Data Source

PatentUS20260084104A1Systems and methods for carbon sequestration using enhanced weathering

Publication Date: 2026.03.26 YALE UNIVERSITY

AI summary

The present disclosure relates, in part, to enhanced weathering systems and/or apparatuses and methods of use thereof. In one aspect, the present disclosure provides a method of at least partially sequestering CO2 from an influent aqueous solution comprising aqueous and/or gaseous CO2. In another aspect, the present disclosure provides a method of at least partially sequestering CO2 from a gaseous CO2 source. In another aspect, the present disclosure provides systems and/or apparatuses suitable for use in the methods described herein. In another aspect, the present disclosure provides a method of optimizing the design and operation of a system for at least partial sequestration of CO2 from a water source.