Gas Separation Membrane Module Optimizing CO2 Permeation
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Solution Overview
Problem
Current gas separation methods using gas membrane separation processes for carbon dioxide (CO2) face challenges in achieving high separation efficiency, particularly in large-scale applications, where the efficiency often drops compared to laboratory-scale processes.
Innovation Solution
The method involves a gas separation membrane module with a hydrophilic resin composition layer, where the pressure and temperature are optimized by increasing them within specific ranges (0.5 MPaG to 10 MPaG and 100°C to 200°C respectively) to enhance the permeation of CO2, and an inert gas is used to prevent moisture condensation during pressure increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the gas separation membrane module is used in large-scale processes, then the throughput and recovery rate increase, but the separation efficiency drops compared to laboratory-scale processes
Solution Approach 1:
The patent applies parameter changes by optimizing the pressure and temperature conditions within specific ranges (pressure: 0.5-10 MPaG, temperature: 100-200°C) to maintain separation efficiency while operating at large scale. This resolves the contradiction by adjusting operational parameters to preserve manufacturing precision (separation efficiency) while achieving high productivity.
Solution Approach 2:
The patent implements preliminary action by pre-heating the raw gas to 100-200°C before it enters the membrane module and by pre-establishing the pressure conditions (0.5-10 MPaG). This preliminary preparation ensures that the membrane operates under optimal conditions from the start, maintaining separation efficiency even in large-scale applications where such conditions might otherwise be compromised.
2Manufacturing precision
If the pressure is increased to enhance CO2 permeation, then the separation efficiency improves, but the risk of moisture condensation increases
Solution Approach 1:
The patent simultaneously adjusts pressure and temperature parameters within coordinated ranges (pressure: 0.5-10 MPaG, temperature: 100-200°C). By maintaining temperature within this range while increasing pressure, the patent enhances CO2 permeation and separation efficiency while preventing moisture condensation, thus resolving the contradiction between improving separation efficiency and avoiding harmful condensation.
Solution Approach 2:
The patent creates an inert thermal environment by maintaining elevated temperatures (100-200°C) within the membrane module, which prevents moisture condensation even under high pressure conditions. This thermal inert environment allows the system to operate at high pressure for enhanced separation without the harmful effect of condensation.
3Manufacturing precision
If the temperature is increased to prevent moisture condensation, then the separation efficiency is maintained, but the energy consumption increases
Solution Approach 1:
The patent optimizes the temperature parameter within a specific range (100-200°C) rather than using excessively high temperatures. This optimized parameter range is sufficient to prevent moisture condensation and maintain separation efficiency while minimizing energy consumption, thus resolving the contradiction between maintaining separation efficiency and reducing energy use.
Solution Approach 2:
The patent applies local quality by heating the raw gas and maintaining temperature specifically within the membrane module where it is most needed for preventing condensation and maintaining separation efficiency. This localized thermal management approach reduces overall energy consumption compared to heating the entire system, as temperature control is focused only where it provides the greatest benefit.
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 maintains excellent separation efficiency for CO2, even in large-scale processes, by optimizing the conditions within the gas separation membrane module, thereby suppressing the drop in efficiency observed in larger scales compared to laboratory settings.
Implementation Method 1
a gas separation membrane including a hydrophilic resin composition layer for selectively allowing for permeation of the specific gas
Implementation Method 2
the gas separation membrane allows for permeation of the specific gas based on a dissolution-diffusion mechanism
Data Source
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AI summary
Provided is a method for separating, from a raw gas containing a specific gas, the specific gas using a gas separation membrane module. The gas separation membrane module includes a housing and a gas separation membrane element enclosed in the housing. The gas separation membrane element includes a gas separation membrane including a hydrophilic resin composition layer for selectively allowing for permeation of the specific gas. The method includes the steps of: increasing pressure in an interior of the gas separation membrane module; increasing a temperature in the interior of the gas separation membrane module; and feeding a raw gas to the interior of the gas separation membrane module in that order.