PDF Publication Title:
Text from PDF Page: 050
4. Operation at higher methanol concentration with barrier layer Operating the cell with a 1mol/L solution is not acceptable for transportation and portable applications, as too much water needs to be carried. However, performance drops quickly when concentration increases beyond this because of crossover. This phenomenon can be limited using PTFE to increase electrode resistance to methanol diffusion. It might keep a constant anode catalytic layer concentration whatever the concentration of the feed stream is. This is possible to achieve if resistance and concentration gradient are well balanced. The goal is to get the same performance as when a regular Pt/Ru-Pt black MEA is fed with a 1mol/L solution of methanol. The polarization curve obtained for this MEA will be used a reference during the study. Three ways to create a PTFE barrier come immediately to mind. The first and easier one is to spray directly PTFE solution on the top of an electrode. It may be more efficient than adding PTFE directly to the catalytic layer. a. EffectofaPTFEsolutionsprayedonthetopoftheanode 0.2mL of PTFE solution was diluted in 1mL of ethanol before being sprayed on the 4mg/cm2 Pt/Ru black electrode. The amount of PTFE was set at 10% of the weight of catalyst. The cathode catalyst was 4mg/cm2 Pt black. Performance was extremely low and did not improve with higher methanol concentration. PTFE seems to have almost completely covered the carbon cloth surface and blocked methanol. b. Effect of a PTFE solution sprayed between the electrode backing and the anode catalytic layer The same solution as in the previous experiment was used. Performance was slightly increased using PTFE with a 5mol/L solution (Figure 31). It is nevertheless far from what was hoped. The PTFE resistance is too high for a 5mol/L solution. It might have been expected that higher concentration may improve performance. However, with the 10wt % PTFE resistance layer the optimal feed concentration was 5mol/L. Beyond, performance dropped again. - 50 -PDF Image | Direct Methanol Fuel Cell (DMFC) Performance
PDF Search Title:
Direct Methanol Fuel Cell (DMFC) PerformanceOriginal File Name Searched:
methanol-fuel-cell-performance.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 | RSS | AMP |