Water-Based Amine Composition for Faster Carbon Dioxide Emission
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Solution Overview
Problem
Conventional carbon dioxide absorption liquids using N,N,N′,N″,N″-pentamethyldiethylenetriamine exhibit low carbon dioxide emission performance, leading to increased energy requirements and decreased efficiency in the separation and recovery process.
Innovation Solution
A composition for carbon dioxide separation comprising specific amine compounds represented by General Formulas (1), (3), and optionally (4), with a nitrogen atom ratio of 1.0 to 8.0, and water, facilitating faster carbon dioxide absorption and emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional carbon dioxide absorption liquids using N,N,N′,N″,N″-pentamethyldiethylenetriamine are used, then carbon dioxide absorption is achieved, but carbon dioxide emission performance is low
Solution Approach 1:
The patent applies composite materials by combining N,N,N′,N″,N″-pentamethyldiethylenetriamine with piperazine or homopiperazine in specific ratios (0.1-10 mass%). This composite amine composition creates synergistic effects that simultaneously improve carbon dioxide emission performance and increase emission rate, resolving the contradiction between reliability and productivity in the carbon dioxide separation process
Solution Approach 2:
The patent changes the chemical composition parameters of the absorption liquid by introducing secondary amine compounds (piperazine or homopiperazine) and controlling their ratio to the primary amine compound. This parameter modification transforms the emission characteristics, achieving both high emission performance and high emission rate through optimized compositional parameters
2Reliability
If carbon dioxide emission temperature is set to be higher than or equal to the boiling point of water, then carbon dioxide can be emitted from monoethanolamine, but more energy is required due to high latent and specific heat of water
Solution Approach 1:
The patent changes the chemical composition of the absorption liquid by incorporating secondary amine compounds (piperazine or homopiperazine) that modify the thermal characteristics of the system. This compositional parameter change enables carbon dioxide emission at lower temperatures, reducing the energy required for heating and thereby resolving the contradiction between emission capability and energy consumption
3Ease of manufacture
If N,N,N′,N″,N″-pentamethyldiethylenetriamine is used as carbon dioxide absorption liquid, then the amine is inexpensive and easily obtained, but carbon dioxide emission performance is low
Solution Approach 1:
The patent maintains ease of manufacture by using commercially available N,N,N′,N″,N″-pentamethyldiethylenetriamine combined with piperazine or homopiperazine, both of which are readily obtainable. The composite formulation improves emission performance while preserving the economic advantage of using readily available chemical materials
Solution Approach 2:
The patent merges the advantages of primary amine compounds (easy availability, low cost) with secondary amine compounds (high emission performance) to create a composite absorption liquid that maintains ease of manufacture while achieving superior carbon dioxide emission characteristics
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 composition achieves faster carbon dioxide emission rates and superior separation performance, enabling efficient processing of large amounts of carbon dioxide from exhaust gases in thermal power generation.
Implementation Method 1
absorption of carbon dioxide from a mixed gas into an absorption liquid
Implementation Method 2
emission of carbon dioxide absorbed in the absorption liquid
Data Source
AI summary
There is a problem that conventionally known carbon dioxide absorption liquids solutions of using aqueous N,N,N′,N″,N″-pentamethyldiethylenetriamine will have a low carbon dioxide emission rate.A composition for carbon dioxide separation use is used which includes: an amine compound (A) represented by General Formula (1) or (2) as described in the specification; an amine compound (B) represented by General Formula (3) as described in the specification; and water, in which the composition for carbon dioxide separation use may further contain an amine compound (C) represented by General Formula (4) as described in the specification, and the number of moles of nitrogen atoms (nitrogen atoms of tertiary amino groups) contained in the amine compounds (A) and (C) is within a range of 1.0 to 8.0 times the number of moles of nitrogen atoms (nitrogen atoms of secondary amino groups) contained in the amine compound (B).