Metal Complex Elastomer Adsorbent for Gas Separation
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Solution Overview
Problem
Conventional adsorbent materials face challenges in achieving high adsorption amounts, selective gas separation, and maintaining shape after molding, leading to increased apparatus size and energy consumption in gas separation processes.
Innovation Solution
A composition comprising a metal complex with an anionic ligand and a neutral organic ligand capable of multidentate binding, combined with an elastomer, which undergoes volume changes due to chemical stimulation, maintaining its structure and adsorption performance even after molding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional adsorbent materials are used for gas separation, then the separation process can be performed, but the adsorption amount is insufficient and the separation coefficient decreases, leading to increased apparatus size
Solution Approach 1:
The patent changes the chemical parameters of the adsorbent material by introducing metal complexes with specific ligands (anionic and neutral multidentate ligands) that can undergo volume changes upon adsorption. This chemical modification enables significantly higher adsorption amounts and separation coefficients compared to conventional materials, thereby reducing the required apparatus size for gas separation operations.
Solution Approach 2:
The invention employs composite materials consisting of metal complexes combined with elastomers. This composite structure allows the material to maintain its shape and mechanical integrity while exhibiting the volume change phenomenon necessary for high-performance gas adsorption and separation, thus achieving both high adsorption capacity and structural stability in a single integrated material system.
2Quantity of substance
If coordination polymer is used as adsorbent material, then superior adsorption performance is achieved, but the pellet form cannot be maintained after gas adsorption due to volume expansion
Solution Approach 1:
The patent modifies the physical parameters of the coordination polymer by combining it with elastomers in a composite structure. This modification allows the material to undergo controlled volume changes during gas adsorption without compromising the overall pellet shape, as the elastomer component provides structural flexibility and shape retention while the coordination polymer maintains its high adsorption performance.
3Quantity of substance
If gas separation is performed based on difference in equilibrium adsorption amount, then separation can be achieved, but the separation coefficient decreases and apparatus size increases
Solution Approach 1:
The invention changes the adsorption parameters of the material by using metal complexes that exhibit significant volume changes upon gas adsorption. This parameter change results in much higher separation coefficients for different gases, enabling efficient gas separation with compact apparatus dimensions, as the enhanced adsorption differential allows for smaller separation columns and reduced equipment volume.
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 adsorbent material exhibits superior adsorption, storage, and separation performance for various gases, including carbon dioxide, hydrogen, and nitrogen, with maintained shape and performance post-molding, reducing apparatus size and energy consumption.
Implementation Method 1
the metal complex undergoes changes in the structure and size of pores in the framework due to chemical stimulation caused by the adsorption of a substance into the pores of the metal complex
Implementation Method 2
the volume of the coordination polymer undergoing a change in dynamic structure when exposed to external stimulation was expanded upon gas adsorption
Data Source
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AI summary
An object of the present invention is to provide an adsorbent material having excellent gas storage performance and gas separation performance. This object can be achieved by an adsorbent material comprising a composition comprising a metal complex (A) and an elastomer (B), the metal complex (A) containing an anionic ligand and at least one metal ion selected from ions of metals belonging to Groups 1 to 13 of the periodic table, the metal complex (A) being capable of undergoing a volume change upon adsorption, and the mass ratio of the metal complex (A) and the elastomer (B) being within the range of 1:99 to 99:1.