Zeolite Dispersion in Size-Excluded Liquid for CO2 Separation
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Solution Overview
Problem
Current methods for gas separation, such as using amine solutions and Genosorb, are inefficient due to high energy requirements, toxicity, corrosion issues, and limited CO2 uptake and selectivity over CH4, while porous liquids are difficult to prepare and have unpredictable gas solubility.
Innovation Solution
A method involving a dispersion of zeolite particles in a size-excluded liquid, where the liquid is too large to enter the zeolite pores, enhancing CO2 uptake and selectivity by using zeolite Rho with additives like polyethylene glycol dimethyl ether, and regenerating the dispersion through vacuum and heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If amine solutions are used for gas separation, then CO2 dissolution is achieved, but toxicity and corrosion issues arise
Solution Approach 1:
The patent employs porous solid particles (zeolites, activated carbon, MOFs) dispersed in a liquid carrier to achieve gas separation. The porous structure provides selective adsorption sites for CO2 molecules while the liquid carrier provides a non-toxic, non-corrosive medium, thus eliminating the harmful effects of amine-based solutions while maintaining CO2 uptake capability
Solution Approach 2:
The invention creates a composite system combining solid porous particles with a liquid carrier phase. This composite approach integrates the high CO2 selectivity of porous solids with the safety and ease of handling of liquid carriers, achieving both effective CO2 separation and elimination of toxicity/corrosion problems
2Quantity of substance
If Genosorb solvent is used for CO2/CH4 separation, then gas separation is achieved, but CO2 uptake and selectivity are limited
Solution Approach 1:
The patent uses porous particles with controlled pore sizes and chemical compositions (zeolites, activated carbon, MOFs) that provide high CO2 uptake capacity through adsorption. The porous structure enables selective interaction with CO2 molecules while maintaining high selectivity over CH4, overcoming the limitations of conventional solvents like Genosorb
3Loss of energy
If porous solid adsorbents are used for gas separation, then lower energy penalties are achieved, but incorporation into conventional flow processes is difficult
Solution Approach 1:
The patent introduces a liquid carrier phase as an intermediary medium that facilitates the incorporation of porous solid particles into conventional flow processes. The liquid carrier enables easy pumping, filtering, and processing of the porous particles, allowing them to be integrated into existing industrial flow systems while maintaining the low energy penalty characteristics of solid adsorbents
Solution Approach 2:
The invention employs a liquid-based system that leverages hydraulic principles for process integration. The liquid carrier phase allows the porous particles to be transported through conventional piping and processing equipment, enabling seamless integration into existing industrial flow processes without requiring complex solid handling infrastructure
4Quantity of substance
If porous liquids are prepared using conventional methods, then gas separation is achieved, but preparation requires multiple steps and specialised expertise
Solution Approach 1:
The patent separates the porous particles from the liquid carrier into distinct components that can be prepared and mixed independently. The porous particles are pre-synthesized using standard procedures, and the liquid carrier is separately prepared, then simply mixed together. This segmentation simplifies the overall process compared to conventional one-step methods while maintaining gas separation performance
Solution Approach 2:
The invention uses readily available porous particles and common liquid carriers that can be easily obtained and disposed of or regenerated. The system employs materials that do not require specialized expertise to handle or prepare, reducing the skill level needed while maintaining effective gas separation
5Quantity of substance
If porous liquids are used for gas separation, then CO2 uptake is achieved, but gas solubility is difficult to predict due to lack of data
Solution Approach 1:
The patent systematically varies parameters such as porous particle type, surface area, pore size distribution, and liquid carrier composition to establish structure-activity relationships. By controlling these parameters, the system achieves predictable CO2 solubility and separation performance, overcoming the lack of data in conventional porous liquids
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
Significantly increases CO2 uptake and selectivity over CH4, reducing energy consumption and operational costs, with predictable gas solubility and easy regeneration, making it suitable for industrial gas separation processes.
Implementation Method 1
a method of adsorbing a gas into a liquid, comprising at least the step of bringing the gas into contact with a dispersion comprising porous particles dispersed in a liquid phase
Implementation Method 2
the liquid phase is a size-excluded liquid... a liquid which is excluded from the pores of the porous particles, either because it has a molecular size which is too large to enter the pores
Implementation Method 3
regenerating the dispersion through vacuum and heating
Implementation Method 4
regenerating the dispersion through vacuum and heating
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
This invention relates to adispersion comprising porous particles dispersed in a liquid phase, wherein the porous particles comprise a zeolite and the liquid phase is a size-excluded liquid. The invention also relates to amethod of adsorbing agas into a liquid, comprising at least the step of bringing the gas into contact with the dispersion. In addition, the invention relates to an assemblage of thedispersion, the zeolitecomprising a cavity and a gas contained within the cavity.