Magnesium Hydroxide CO2 Capture via Passive and Forced Synthesis

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Solution Overview

Problem

Existing carbon dioxide capture technologies are expensive and energy-intensive, necessitating the development of energy-efficient and carbon-negative methods for capturing and sequestering carbon dioxide.

Innovation Solution

A hybrid method combining passive dissolution and forced decomposition pathways to produce magnesium hydroxide, utilizing waste materials and minimizing energy input, where magnesium chloride is decomposed at high temperatures to form magnesium hydroxide, and calcium oxide is produced from calcium-containing minerals, followed by a reaction with magnesium chloride to capture CO2 as calcium carbonate.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If conventional amine-based carbon dioxide capture technologies are used, then carbon dioxide capture function is achieved, but energy consumption and operational costs are high

Engineering Contradiction:

Improveenergy consumptionVSAvoidcapture function

Core Design Contradiction:

Loss of energyVSReliability

Solution Approach 1:

The patent changes the chemical parameters by using magnesium hydroxide instead of conventional amines, and adjusts the operational parameters by using passive dissolution at ambient temperatures rather than high-temperature processes, thereby reducing energy consumption while maintaining CO2 capture function

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs passive dissolution where magnesium chloride spontaneously reacts with calcium oxide to produce magnesium hydroxide without requiring external energy input, making the system self-sustaining and eliminating the need for energy-intensive hydroxide production

Inventive Principle:

Principle #25Self-service

2Quantity of substance

If forced decomposition pathway is used to produce magnesium hydroxide, then magnesium hydroxide is generated, but energy input and carbon footprint increase

Engineering Contradiction:

Improvemagnesium hydroxide productionVSAvoidenergy input

Core Design Contradiction:

Quantity of substanceVSUse of energy by moving object

Solution Approach 1:

The patent uses passive dissolution where magnesium chloride spontaneously reacts with calcium oxide to produce magnesium hydroxide without requiring external energy input, making the system self-sustaining and eliminating the need for energy-intensive hydroxide production

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent converts the naturally occurring passive dissolution process into a beneficial production method, utilizing the spontaneous reaction between magnesium chloride and calcium oxide to generate magnesium hydroxide, thereby turning a naturally occurring process into an energy-efficient industrial application

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Quantity of substance

If multiple steps are used to produce magnesium hydroxide and chloride, then complete production is achieved, but process complexity and operational difficulty increase

Engineering Contradiction:

Improvemagnesium hydroxide and chloride productionVSAvoidprocess steps

Core Design Contradiction:

Quantity of substanceVSDevice complexity

Solution Approach 1:

The patent merges the production of magnesium hydroxide and calcium chloride into a single passive dissolution reaction step, where magnesium chloride reacts with calcium oxide to simultaneously produce both chemicals needed for the capture process, thereby simplifying the overall process

Inventive Principle:

Principle #5Merging (Combining)

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 reduces the energy penalty and operational costs of carbon dioxide capture and sequestration by leveraging waste materials and recovering heat, achieving a low-energy process with efficient carbon dioxide capture and storage.

Implementation Method 1

The forced decomposition pathway involves high temperature decomposition of a magnesium chloride hydrate to produce magnesium hydroxide

Methodology Applied

Scientific EffectThermal decomposition: Pyrolysis

Implementation Method 2

The passive dissolution pathway involves dissolution of a mineral-oxide that forms the hydroxide-immediately and produces a chloride salt from the mineral-oxide

Methodology Applied

Scientific EffectPassive dissolution: Solvation

Implementation Method 3

An aqueous solution of magnesium hydroxide, for example, is an alkaline solution that can capture gaseous carbon dioxide and sequester it in the form of a magnesium carbonate salt

Methodology Applied

Scientific EffectChemical absorption: Absorption (physical)

Implementation Method 4

requires a condensation and production of HCl acid from condensation of the gascous HCl

Methodology Applied

Scientific EffectCondensation: Condensation

Data Source

PatentUS20260054219A1Passive and forced synthesis of mg(OH)2 for the purpose of supplying magnesium-based capture of co2

Publication Date: 2026.02.26 CARBONFREE CHEMICALS HOLDINGS LLC

AI summary

The present invention relates to a method for capturing carbon dioxide and sequestering the carbon dioxide as calcium carbonate. The method involves the use of an aqueous solution of magnesium hydroxide as a carbon dioxide uptake fluid. The magnesium hydroxide in the uptake fluid is produced by two distinct pathways. a forced decomposition pathway and a passive dissolution pathway. The combined use of the forced decomposition and passive dissolution pathways is a significant contributing factor to the low energy penalty of the carbon dioxide capture and sequestration method.