PDF Publication Title:
Text from PDF Page: 003
ENGINEERING LIBRARY Abstract The aim of this project was to explore the synergistic use of alkaline fuel cells and liquid hydrogen. For electrochemical power generation, alkaline fuel cells offer the highest efficiency, as well as the possibility of using electrocatalysts that do not include platinum. However, since they operate at low temperatures they do not support hydrogen production by reformation of carbonaceous fuels. Further, they are rendered inoperative by the CO2 content of the (reformed) fuel and/or air. Their use has been limited due to this inability to use hydrogen or air which contains CO2, and the added complexity of CO2 removal. For storing hydrogen the most suitable system in terms of low mass and volume, is cryogenic storage of liquid hydrogen. The large temperature difference between the stored liquid and its surroundings means that a substantial thermomechanical exergy component, in addition to the chemical exergy, is available from the fuel. Thermomechanical exergy recovery has the potential to make the use of liquid hydrogen more efficient. The basis of this thesis is the conceptual design, development and testing of a new process for CO2 removal from air for use in alkaline fuel cells operating with hydrogen stored as a liquid, addressing simultaneously: • CO2 removal from atmospheric air, and • thermomechanical exergy recovery from liquid hydrogen. This project was an attempt to address these issues by using the cooling available from vaporisation of liquid hydrogen and/or boil-off vapour, to remove CO2 from the alkaline fuel cell feed air by refrigeration purification, ie. by freezing the CO2 out of the air. A schematic description of the process and an energy balance for refrigeration purification for the CO2 removal are presented, showing that the process relies on high effectiveness heat exchangers and water re-vaporisation. The high effectiveness heat transfer is achieved using perforated plate matrix heat exchangers. Experimental results of heat exchanger effectiveness tests and CO2 removal tests indicate that heat exchangers of the requisite effectiveness were designed and manufactured, and that the proposed process was successful in CO2 removal to the required level. Implicit in this work was: • The development of a new sizing procedure for matrix heat exchangers based on a recently developed approximate analytical solution for their performance. • Experimental testing of matrix heat exchanger performance and correlation with a recently published numerical solution for their performance prediction. • The development of a new method for construction of perforated plate matrix heatPDF Image | CO2 removal from air for alkaline fuel cells operating with liquid H2
PDF Search Title:
CO2 removal from air for alkaline fuel cells operating with liquid H2Original File Name Searched:
35465756.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 |