Spiro Ammonium CO2 Absorbent for Low-Viscosity Carbon Capture

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing carbon dioxide absorbents face challenges in efficiently capturing and separating CO2 due to issues such as layer separation, increased viscosity, and the need for additional solvents, which affect economic effectiveness and operational efficiency.

Innovation Solution

A carbon dioxide absorbent containing a spiro ammonium cation and a hydroxide anion, which are soluble in water, allowing for efficient CO2 capture and desorption without layer separation, and maintaining low viscosity, thereby enhancing operational efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If conventional ionic materials are used as CO2 absorbents, then CO2 capture capacity can be improved, but layer separation occurs and additional solvents are required

Engineering Contradiction:

ImproveCO2 capture capacityVSAvoidlayer separation

Core Design Contradiction:

Quantity of substanceVSStability of the object's composition

Solution Approach 1:

The patent changes the chemical parameters of the ionic material by using spiro ammonium cations with specific molecular structures and hydroxide anions, which fundamentally alters the absorbent's properties to prevent layer separation while maintaining high CO2 capture capacity

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite absorbent system combining spiro ammonium hydroxide ionic material with water and optional amine-based compounds, where each component contributes specific properties that collectively prevent layer separation and enhance CO2 capture performance

Inventive Principle:

Principle #40Composite materials

2Productivity

If conventional absorbents are used, then CO2 separation can be achieved, but viscosity increases affecting operational efficiency

Engineering Contradiction:

ImproveCO2 separation efficiencyVSAvoidviscosity

Core Design Contradiction:

ProductivityVSForce

Solution Approach 1:

The patent changes the physical parameters of the absorbent by selecting spiro ammonium cations with specific molecular weights and structures, which maintain low viscosity even at high concentrations, thereby improving operational efficiency and CO2 separation performance

Inventive Principle:

Principle #35Parameter changes

3Reliability

If additional solvents are added to conventional absorbents, then absorbent performance can be improved, but economic effectiveness decreases

Engineering Contradiction:

Improveabsorbent performanceVSAvoideconomic effectiveness

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The spiro ammonium hydroxide ionic material is self-sufficient in providing the necessary absorbent properties without requiring additional solvents or additives, thereby simplifying the system and improving economic effectiveness while maintaining high CO2 capture performance

Inventive Principle:

Principle #25Self-service

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 absorbent effectively increases CO2 capture capacity per unit volume, reduces the need for additional solvents, and minimizes absorbent loss, leading to more economical and efficient CO2 separation processes.

Implementation Method 1

In the chemical absorption method, aqueous solutions of amines such as monoethanolamine (MEA), N-methyldiethanolamine (MDEA), and diethanolamine (DEA) have been most widely used

Methodology Applied

Scientific EffectChemical absorption: Absorption (physical)

Implementation Method 2

a carbon dioxide separation method including bringing the carbon dioxide absorbent into contact with a mixture containing carbon dioxide under a temperature condition of 20°C to 80°C

Methodology Applied

Scientific EffectDesorption: Desorption

Data Source

PatentEP4674510A2Carbon dioxide absorbent, method of preparing the same, and carbon dioxide separation method using the same

Publication Date: 2026.01.07 SK INNOVATION CO LTD

AI summary

The present disclosure relates to a carbon dioxide absorbent containing an ionic material containing a spiro ammonium cation and a hydroxide anion. The carbon dioxide absorbent according to an exemplary embodiment contains a hydroxide anion having a small molecular weight and high basicity, such that absorption performance per unit volume of the absorbent may be effectively improved. Further, the carbon dioxide absorbent according to an exemplary embodiment is soluble in water and thus may not cause layer separation problems.