Liquid Marble Gas Purification Surface Area
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Solution Overview
Problem
Current gas purification methods for natural and waste gases face inefficiencies due to low surface area contact between purification liquids and gases, particularly in dehydration and sweetening steps, leading to increased energy consumption and longer purification times.
Innovation Solution
The use of micronized liquid marbles, composed of particles encapsulating liquids such as monoethanolamine, diethanolamine, or their solutions, which enhance the surface area for gas absorption and facilitate faster reaction rates and regeneration, reducing the need for liquid agitation and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If purification liquids are used in conventional bulk form, then the liquid can be easily transported and handled, but the surface area contact with gas is insufficient leading to slow absorption rates
Solution Approach 1:
The bulk liquid is segmented into numerous small droplets or bubbles dispersed in a carrier gas or liquid matrix. This segmentation dramatically increases the total surface area available for gas-liquid contact, thereby accelerating the absorption rate of CO2 and other acidic gases while maintaining easy handling through the carrier medium.
Solution Approach 2:
The invention utilizes porous carrier materials or foam structures that provide extensive internal surface area for liquid distribution. The porous structure allows bulk liquid to be held in capillary channels where it contacts passing gases over large surface areas, enhancing absorption efficiency without requiring large volumes of liquid.
2Productivity
If neat amine liquids are used to maximize purification efficiency, then the absorption capacity increases, but the high viscosity makes liquid agitation and transport difficult
Solution Approach 1:
The invention employs gas flow to transport and distribute the viscous amine liquid throughout the contactor. By using pneumatic principles where gas streams carry liquid droplets or bubbles through the system, the need for mechanical agitation and pumping of high-viscosity liquids is eliminated, making operation easier while maintaining high purification efficiency.
Solution Approach 2:
The system transitions from static bulk liquid to dynamic dispersed liquid phases that move with the gas flow. This dynamic approach allows viscous amines to be continuously circulated and renewed at the gas-liquid interface without requiring mechanical stirring, improving both ease of operation and mass transfer efficiency.
3Productivity
If liquid agitation is increased to enhance surface interaction with gases, then the mass transport rate improves, but the energy consumption increases
Solution Approach 1:
The invention replaces energy-intensive mechanical agitation with pneumatic driving forces. Gas flow itself provides the energy to disperse, circulate, and renew the liquid phases at the gas-liquid interface. This approach achieves high mass transport rates by utilizing the kinetic energy of the gas stream rather than separate mechanical agitation systems.
Solution Approach 2:
The gas flow serves dual functions: both as the process stream to be purified and as the driving force for liquid circulation and renewal. The system is self-sustaining where the main process gas provides the energy needed for mass transfer enhancement, eliminating the need for external agitation energy input.
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 accelerates gas absorption and exchange rates, allowing for more efficient purification and regeneration of gases, such as CO2, while minimizing energy usage and operational complexity.
Implementation Method 1
The liquid may be comprised of a gelling agent, such as but not limited to, fumed silica or hydrophobic silica, so as to increase the stability of the dry form
Implementation Method 2
By enhancing the contact area of the liquids with the gas, the efficiency and rate of purification would increase. Further, the domain size of the liquids is decreased by discretizing the liquids into micronized droplets, thus enhancing mass transport of gases
Data Source
AI summary
The invention relates to methods for purifying gas, and in particular, to such methods using liquid marbles. The liquid in the liquid marbles is comprised of a material or mixture of materials that selectively removes unwanted gaseous component in the gas to be purified.