PDF Publication Title:
Text from PDF Page: 124
the carbon pores by carbonate crystals. Improved electrodes can withstand even high amounts of CO2 (5 percent) over many thousands of hours, as proven recently by DLR (Deutsches Zentrum fuer Luft- und Raumfahrt) (26). Figure 4-7 Degradation in AFC Electrode Potential with CO2 Containing and CO2 Free Air Source: Figure 2, p. 381, Reference (25) High concentrations of KOH are also detrimental to the life of O2 electrodes operating with CO2- containing air, but operating the electrode at higher temperature is beneficial because it increases the solubility of CO2 in the electrolyte. Hence, modifying the operating conditions can prolong electrode life. Extensive studies by Kordesch, et al. (25) indicate that the operational life of air electrodes (PTFE-bonded carbon electrodes on porous nickel substrates) with CO2-containing air in 9N KOH at 65 °C ranges from 1,600 to 3,400 hours at a current density of 65 mA/cm2. The life of these electrodes with CO2-free air tested under similar conditions ranged from 4,000 to 5,500 hours. It was reported (2) that a lifetime of 15,000 hours was achieved with AFCs, with failure caused at that time by corrosion of the cell frames. 4.2.4 EffectsofCurrentDensity As in the case with PAFCs, voltage obtained from an AFC is affected by ohmic, activation, and concentration losses. Figure 4-8 presents data obtained in the 1960s (22) that summarizes these effects, excluding electrolyte ohmic (iR) losses, for a catalyzed reaction (0.5 to 2.0 mg noble metal/cm2) with carbon-based porous electrodes for H2 oxidation and O2 reduction in 9N KOH at 55 to 60 °C. The electrode technology was similar to that employed in the fabrication of PAFC electrodes. 4-12PDF Image | Fuel Cell Handbook (Seventh Edition)
PDF Search Title:
Fuel Cell Handbook (Seventh Edition)Original File Name Searched:
fuel-cell-handbook.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 |