logo

Membrane Electrode Assembly Modification by Zeolite and Graphene Oxide

PDF Publication Title:

Membrane Electrode Assembly Modification by Zeolite and Graphene Oxide ( membrane-electrode-assembly-modification-by-zeolite-and-grap )

Previous Page View | Next Page View | Return to Search List

Text from PDF Page: 090

𝑗 π‘™π‘–π‘š = π‘™π‘–π‘šπ‘–π‘‘π‘–π‘›π‘” π‘π‘’π‘Ÿπ‘Ÿπ‘’π‘›π‘‘ 𝑑𝑒𝑛𝑠𝑖𝑑𝑦 ( π‘šπ΄ ) π‘π‘š2 Method and characterisation 3.2.7.1 Methanol permeability in DMFC The methanol crossover is obtained by using linear sweep voltammetry method. The data obtained from the LSV test (current density vs volt) can be used to evaluate the methanol permeability. The product of diffusion coefficient and the concentration of methanol called methanol permeability [161]. Methanol crossover takes place in the fuel cell due to the electro-osmotic drag mode (Fdrag) (the flow of methanol from anode to cathode by an applied potential) and the diffusion by methanol concentration gradient (Fdiff.). Therefore the total diffusional net flux (Fnet) of methanol across the membrane (from anode to cathode) is given by [162]: Fnet = Fdiff.- Fdrag (3.6) The ratio of flux by diffusion (Fdiff) to the flux by osmosis drag (Fdrag) is the drag coefficient kdl. On the base of limiting current density (jlim), the methanol crossover can be determined by Faraday’s law. Therefore, 𝐹𝑛𝑒𝑑 = π‘—π‘™π‘–π‘š, and 𝑛𝐹 𝐹𝑑𝑖𝑓𝑓. = π·πΆπ‘š, πΏπ‘š π‘—π‘™π‘–π‘š =(1βˆ’π‘˜π‘‘π‘™)βˆ—π·πΆπ‘š therefore, equation (3.6) becomes 𝑛𝐹 πΏπ‘š (3.7) 𝐹 = πΉπ‘Žπ‘Ÿπ‘Žπ‘‘π‘Žπ‘¦ π‘π‘œπ‘›π‘ π‘‘π‘Žπ‘›π‘‘ = 96485 𝐢/π‘šπ‘œπ‘™ 𝑛 = π‘›π‘’π‘šπ‘π‘’π‘Ÿ π‘œπ‘“ π‘’π‘™π‘’π‘π‘‘π‘Ÿπ‘œπ‘›π‘  = 6 π‘˜π‘‘π‘™ = π‘‘π‘Ÿπ‘Žπ‘” π‘π‘œπ‘’π‘“π‘“π‘–π‘π‘–π‘’π‘›π‘‘ 0.8829 𝐷 = π‘‘π‘–π‘“π‘“π‘’π‘ π‘–π‘œπ‘› π‘π‘œπ‘’π‘“π‘“π‘–π‘π‘–π‘’π‘›π‘‘ π‘π‘š2/𝑠 πΏπ‘š = π‘šπ‘’π‘šπ‘π‘Ÿπ‘Žπ‘›π‘’ 𝑑hπ‘–π‘π‘˜π‘›π‘’π‘ π‘  = 0.0183 π‘π‘š πΆπ‘š = 𝑀𝑒𝑑hπ‘Žπ‘›π‘œπ‘™ π‘π‘œπ‘›π‘π‘’π‘›π‘‘π‘Ÿπ‘Žπ‘‘π‘–π‘œπ‘› (π‘šπ‘œπ‘™) , 𝑀hπ‘’π‘Ÿπ‘’ 1𝐿 = 1000π‘π‘š3 π‘π‘š3 Multiplying the diffusion coefficient (D) by the partition coefficient (K) gives the methanol permeability [162]. Therefore, rearranging equation 3.7 Sirhan AL-Batty Page 90

PDF Image | Membrane Electrode Assembly Modification by Zeolite and Graphene Oxide

membrane-electrode-assembly-modification-by-zeolite-and-grap-090

PDF Search Title:

Membrane Electrode Assembly Modification by Zeolite and Graphene Oxide

Original File Name Searched:

nafion-zeolite.PDF

DIY 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 | RSS | AMP