PDF Publication Title:
Text from PDF Page: 042
The permeability coefficient of a membrane material for a specific gas is defined as the steady-state flux of the gas through a unit thickness of the membrane under a unit partial pressure driving force. A related parameter used to describe the rate at which gas is transported through a particular membrane is permeance, defined as steady-state gas flux divided by the partial pressure driving force, which is equal to the permeability of a material divided by the membrane thickness. Thus membrane permeance can be increased by either using a higher-permeability material or reducing the membrane thickness. Solution-Diffusion Mechanism Permeability is a key factor in the solution-diffusion mechanism that governs the transport of small gas molecules through all polymers currently used as gas separation membranes. In this model, gas molecules first dissolve into the upstream face of a membrane (at high pressure) and then diffuse through the membrane in the direction of decreasing gas partial pressure and desorb from the lower-pressure downstream face of the membrane, as shown in the illustration.3,4 Within this framework, permeability is a function of the gas solubility (which links the gas concentration in the membrane to the pressure in the adjacent gas phase) and the diffusion coefficient of the gas in the membrane (which is a measure of the gas mobility). The ability of a membrane to separate two gases (e.g., CO2 and N2) is often characterized in terms of the ideal selectivity, defined as the ratio of the gas permeabilities. Because permeability is equal to solubility times diffusivity, and selectivity is the ratio of permability coefficients, the membrane selectivity is a function of both solubility selectivity and the diffusion (or mobility) selectivity. Upstream pressure p feed Downstream pressure p perm JA Membrane thickness pfeed > pperm Component A Component B (1) Sorption on upstream side (2) Diffusion down partial pressure gradient (3) Desorption on downstream side • FluxofA≡JA =PA(pfeed,A-pperm,A) • PermeabilityofA≡PA =DASA, where DA ≡ Diffusion coefficient of A SA ≡ Solubility coefficient of A PA DA SA •Selectivity≡αA/B=PB =DBSB Mobility selectivity Solubility selectivity 28PDF Image | 2020 Carbon Capture
PDF Search Title:
2020 Carbon CaptureOriginal File Name Searched:
1291240.pdfDIY PDF Search: Google It | Yahoo | Bing
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
IT XR Project Redstone NFT Available for Sale: NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Be part of the future with this NFT. Can be bought and sold but only one design NFT exists. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Turbine IT XR Project Redstone Design: NFT for sale... NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Includes all rights to this turbine design, including license for Fluid Handling Block I and II for the turbine assembly and housing. The NFT includes the blueprints (cad/cam), revenue streams, and all future development of the IT XR Project Redstone... More Info
Infinity Turbine ROT Radial Outflow Turbine 24 Design and Worldwide Rights: NFT for sale... NFT for the ROT 24 energy turbine. Be part of the future with this NFT. This design can be bought and sold but only one design NFT exists. You may manufacture the unit, or get the revenues from its sale from Infinity Turbine. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Supercritical CO2 10 Liter Extractor Design and Worldwide Rights: The Infinity Supercritical 10L CO2 extractor is for botanical oil extraction, which is rich in terpenes and can produce shelf ready full spectrum oil. With over 5 years of development, this industry leader mature extractor machine has been sold since 2015 and is part of many profitable businesses. The process can also be used for electrowinning, e-waste recycling, and lithium battery recycling, gold mining electronic wastes, precious metals. CO2 can also be used in a reverse fuel cell with nafion to make a gas-to-liquids fuel, such as methanol, ethanol and butanol or ethylene. Supercritical CO2 has also been used for treating nafion to make it more effective catalyst. This NFT is for the purchase of worldwide rights which includes the design. More Info
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
Infinity Turbine Products: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. May pay by Bitcoin or other Crypto. Products Page... More Info
CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)