PDF Publication Title:
Text from PDF Page: 173
After considering the equilibrium established by the water gas shift reaction, the equilibrium concentrations can be calculated (see Example 9-5 in Section 9) using Equation (6-20) and the equilibrium constant; see for instance, Broers and Treijtel (62). The equilibrium concentrations are substituted into Equation (6-4) to determine E as a function of T. Table 6-4 Equilibrium Composition of Fuel Gas and Reversible Cell Potential as a Function of Temperature Parametera PH2 PCO2 PCO PH2O Eb (V) Kc 0.2474 800 0.669 0.088 0.106 0.137 900 1000 0.649 0.643 0.068 0.053 0.126 0.141 0.157 0.172 1.143 1.133 0.4538 0.7273 Temperature (°K) 1.155 a - P is the partial pressure computed from the water gas shift equilibrium of inlet gas with composition77.5 percent H2/19.4 percent CO2/3.1 percent H2O at 1 atmosphere. b -Cell potential calculated using Nernst equation and cathode gas composition of 30 percent O2/60 percent CO2/10 percent N2. c - Equilibrium constant for water gas shift reaction from Reference (59). The results of these calculations are presented in Table 6-4. Inspection of the results shows a change in the equilibrium gas composition with temperature. The partial pressures of CO and H2O increase at higher T because of the dependence of K on T. The result of the change in gas composition, and the decrease in E° with increasing T, is that E decreases with an increase in T. In an operating cell, the polarization is lower at higher temperatures, and the net result is that a higher cell voltage is obtained at elevated temperatures. The electrode potential measurements (9) in a 3 cm2 cell30 show that the polarization at the cathode is greater than at the anode, and that the polarization is reduced more significantly at the cathode with an increase in temperature. At a current density of 160 mA/cm2, cathode polarization is reduced by about 160 mV when the temperature increases from 550 to 650 °C, whereas the corresponding reduction in anode polarization is only about 9 mV (between 600 and 650 °C, no significant difference in polarization is observed at the anode). Baker, et al. (63) investigated the effect of temperature (575 to 650 °C) on the initial performance of small cells (8.5 cm2). With steam-reformed natural gas as the fuel and 30 percent 30. Electrolyte is 55 wt% carbonate eutectic (57 wt% Li2CO3, 31 wt% Na2CO3, 12 wt% K2CO3) and 45 wt% LiA1O2, anode is Co + 10% Cr, cathode is NiO, fuel is 80% H2/20% CO2 and oxidant is 30% CO2/70% air. 6-20PDF 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 (Standard Web Page)