Amine Absorbent with Superfine Inert Bubbles
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing acidic gas absorbents, particularly those containing amine compounds, deteriorate when exposed to oxygen during the regeneration process for CO2 recovery, leading to reduced effectiveness in cyclic use.
Innovation Solution
Incorporating superfine bubbles with an average diameter of 150 nm or less, typically containing inert gases like nitrogen, into an acidic gas absorbent comprising an amine compound and water, which prevents oxygen dissolution and subsequent amine compound denaturation, thereby enhancing stability and longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If amine compounds are used as acidic gas absorbents for CO2 recovery, then CO2 absorption capability is improved, but amine compound denaturation occurs due to oxygen action during regeneration, worsening absorbent stability
Solution Approach 1:
The patent introduces superfine bubbles containing inert gas (nitrogen or carbon dioxide) into the absorbent solution. These bubbles form a protective inert environment that prevents oxygen from dissolving into the absorbent and causing amine denaturation during the regeneration process, thereby maintaining absorbent stability while preserving CO2 absorption capability
Solution Approach 2:
The patent changes the physical state of the inert gas from bulk phase to superfine bubbles with specific diameter parameters (1-100 μm, preferably 1-10 μm). This parameter change increases the surface area to volume ratio, enhancing the protective effect against oxygen dissolution while maintaining the chemical properties of the amine absorbent
2Productivity
If absorbent is heated for regeneration to release CO2, then CO2 release efficiency is improved, but amine compound deterioration accelerates due to thermal and oxidative stress
Solution Approach 1:
The patent applies beforehand cushioning by introducing inert gas bubbles into the absorbent before the regeneration heating process. This creates a protective buffer that prevents oxygen from attacking the amine compounds during thermal stress, cushioning against deterioration and extending absorbent lifespan while maintaining regeneration efficiency
3Productivity
If cyclic use of absorbent is implemented for continuous CO2 recovery, then productivity is improved, but absorbent effectiveness deteriorates over time due to repeated oxidative damage
Solution Approach 1:
The patent enables continuous useful action by maintaining absorbent effectiveness throughout cyclic operation. The inert gas bubbles persist through multiple absorption-regeneration cycles, continuously preventing oxygen dissolution and amine denaturation, thereby sustaining high CO2 absorption capability over extended operational periods
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 acidic gas absorbent with superfine bubbles effectively prevents amine compound deterioration, allowing for efficient and prolonged absorption and release of acidic gases like CO2, maintaining high processing efficiency and reducing energy consumption.
Implementation Method 1
contains an amine compound and water, and further contains superfine bubble containing inert gas wherein an average diameter of the superfine bubble is 150 nm or less
Implementation Method 2
prevents oxygen dissolution and subsequent amine compound denaturation, thereby enhancing stability and longevity
Implementation Method 3
As practical chemical absorbents, amine compounds have been studied for a long time. In carbon dioxide recovery systems, acidic gas absorbents containing the amine compounds are generally regenerated and cyclically used
Data Source
AI summary
The embodiments provide an acidic gas absorbent kept from deterioration, an acidic gas removal method using the absorbent, and an acidic gas removal apparatus using the same. The acidic gas absorbent contains an amine compound and water, and further contains superfine bubble containing inert gas wherein an average diameter of said superfine bubble is 150 nm or less. The acidic gas removal method provided here employs that absorbent. The acidic gas removal apparatus is equipped with a unit for introducing the superfine bubbles into the absorbent.