Block Composite Gas Storage Material with Bimodal Pores
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Solution Overview
Problem
Existing gas storage and separation systems face challenges with powdered organometallic coordination polymers (OMCPs) due to mechanical and thermal instability, narrow pore characteristics, and inefficient gas accumulation, especially under varying temperature and pressure conditions.
Innovation Solution
The development of block composite materials using a mixture of organometallic coordination polymers and nanoporous carbon adsorbents with a bimodal pore distribution, combined with a specific binder and processing conditions, to create a mechanically robust and efficient gas storage system adaptable to wide temperature and pressure ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If OMCP is molded into compact forms (granules, spheres, tablets), then ease of operation and mechanical stability are improved, but specific surface area is reduced
Solution Approach 1:
The patent utilizes the inherent porous structure of OMCP materials to create compact molded forms that maintain high specific surface area. The porous nature allows the material to achieve both mechanical stability in compact forms and sufficient surface area for gas storage, resolving the contradiction between form stability and surface area availability.
Solution Approach 2:
The patent creates composite materials by combining OMCP with other materials during the molding process. This composite approach enhances the mechanical stability and structural integrity of compact forms while preserving the high surface area characteristics of OMCP, thereby resolving the contradiction between ease of operation and specific surface area.
2Area of stationary object
If OMCP is synthesized as crystal powders, then specific surface area is improved, but reliability under dynamic conditions deteriorates due to pressure difference, dusting, and wearing
Solution Approach 1:
The patent merges OMCP crystal powders with binding agents and structural materials to form integrated compact structures. This combination maintains the high specific surface area of the powder while eliminating the reliability issues of dusting, wearing, and pressure differences by creating a unified mechanically robust structure.
Solution Approach 2:
The patent employs porous material structures that allow pressure equalization throughout the material body during dynamic operation. This porous architecture maintains high surface area while preventing the pressure differences that cause dusting and wearing in dense powder forms, thereby improving reliability under dynamic conditions.
3Quantity of substance
If expanding agent is used during OMCP compaction, then porosity is improved for gas storage, but specific surface area of pores is reduced due to formation of macropores and mesopores
Solution Approach 1:
The patent controls the parameters of pore formation by adjusting compaction pressure, temperature, and material composition to create an optimal pore size distribution. This approach generates sufficient total porosity for gas storage while maintaining adequate specific surface area by preventing excessive formation of large macropores that would reduce the overall pore surface area.
Solution Approach 2:
The patent creates different pore size characteristics in different regions of the material structure. By controlling local pore formation through varying compaction conditions and material distribution, the patent achieves both sufficient total porosity for gas storage and adequate specific surface area by ensuring that not all pores are large macropores.
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 resulting composite materials exhibit increased pour density, improved mechanical hardness, and efficient gas accumulation across a broad range of temperatures and pressures, enabling more compact and efficient gas storage systems with reduced gas losses.
Implementation Method 1
mixed with a binder, molded under pressure
Implementation Method 2
nanoporous carbon adsorbent
Data Source
AI summary
The group of inventions relates to the method of production of the block composite material for accumulation of gases containing organometallic coordination polymer and carbon material with increased pour density and bimodal pour distribution efficient for gas storage. The proposed method includes mixing of initial components, organometallic coordination polymer, carbon-containing material (microporous carbon adsorbent, carbon nanotubes, graphenes, graphitized black), binder solution like polyvinyl alcohol, chitosan solution in acetic acid, oxyethylcellulose; molding of the prepared mixture under pressure into blocks, drying and activation of blocks. The proposed block composite materials make it possible to increase efficiency and reliability of accumulation systems of complex gas mixtures when operating in wide ranges of temperature and pressure due to availability of at least two pore modes, each of which is capable of accumulation of gas with maximum efficiency at the specific thermodynamic parameters: temperature and pressure.