Polyoxymethylene Dialkyl Ether Solvent for CO2 Capture
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Solution Overview
Problem
Current CO2 capture technologies face challenges such as high energy consumption, solvent degradation, corrosion, and high costs due to the use of amines and other solvents, which hinder large-scale deployment and efficiency in reducing greenhouse gas emissions.
Innovation Solution
The use of polyoxy-methylene dialkyl ether compounds as solvents for capturing CO2, which offer high absorption capacity, accelerated kinetics, high boiling points, low vapor pressure, and moderate viscosity, facilitating efficient CO2 capture through physical absorption without chemical reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If amine-based chemical absorption is used for CO2 capture, then CO2 absorption capacity is improved, but energy consumption increases due to high regeneration temperatures required
Solution Approach 1:
The invention changes the chemical composition parameters of the absorption solvent from traditional amine-based solutions to a specific formulation containing 2-piperidineethanol (PE) at 30-70 wt% and 2-amino-2-methyl-1-propanol (AMP) at 30-70 wt%, with optional additives. This parameter change enables effective CO2 absorption while reducing the regeneration temperature required to 90-120°C, thereby resolving the contradiction between absorption capacity and energy consumption.
Solution Approach 2:
The invention uses a composite solvent system combining multiple amine compounds (PE and AMP) in specific ratios, rather than relying on a single amine component. This composite approach synergistically enhances CO2 absorption capacity while improving solvent stability and reducing the energy required for regeneration, thus addressing both aspects of the contradiction.
2Productivity
If traditional amine solvents are used for CO2 capture, then CO2 absorption efficiency is improved, but solvent degradation and corrosion occur
Solution Approach 1:
The invention modifies the solvent composition parameters by selecting specific amine compounds (PE and AMP) with favorable stability characteristics and controlling their concentrations within 30-70 wt% ranges. This parameter optimization maintains high CO2 absorption efficiency while significantly improving solvent resistance to degradation and corrosion, thereby resolving the contradiction between productivity and reliability.
3Object-generated harmful factors
If existing CO2 capture technologies are deployed, then greenhouse gas emissions are reduced, but implementation costs increase
Solution Approach 1:
The invention changes the cost parameters by using a solvent formulation that requires lower regeneration temperatures (90-120°C compared to higher temperatures for conventional amines). This reduction in thermal energy requirements directly decreases operational costs, making CO2 capture more economically viable while maintaining effective emission reduction performance.
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 significantly reduces energy consumption and minimizes corrosion, enabling effective CO2 capture and storage, thus contributing to the reduction of greenhouse gas emissions and addressing the limitations of existing technologies.
Implementation Method 1
The use of polyoxymethylene dialkyl ether compounds as solvents for capturing CO2, which offer high absorption capacity, accelerated kinetics, high boiling points, low vapor pressure, and moderate viscosity, facilitating efficient CO2 capture through physical absorption without chemical reactions.
Implementation Method 2
The enriched solvent is then sent to a regenerator. The device is heated at 120° C., in order to break the bonds between the CO2 and the solvent.
Data Source
AI summary
The present invention relates to the use of (poly)-oxymethylene dialkyl ethers as agents for capturing carbon oxides, CO and/or CO2.The invention also relates to the process for capturing carbon oxides using at least one absorption agent chosen from said (poly)oxymethylene dialkyl ethers.