PDF Publication Title:
Text from PDF Page: 097
Chapter 6 Conclusions and recommendations It has been said that in a hydrogen economy, a time when hydrogen becomes widely available and used as a major transportation fuel, the use of alkaline fuel cells for transport power generation will be favoured over other types of fuel cells. This is because alkaline fuel cells are inherently more efficient and the range of materials which may be used as electrocatalysts or for structural elements is much larger for alkaline media than for acid media. The direct availability of hydrogen, ie. a supply independent of reformed hydrocarbon fuels, would alleviate the problem of CO2 intolerance of alkaline fuel cells associated with the fuel. The CO2 content of air remains a problem. Research and demonstration projects on hydrogen-air alkaline fuel cell powered vehicles have so far used expendable adsorbers for scrubbing CO2 from the air. These adsorbers represent a substantial added weight and occupy a large volume when used for other than low power or short duration applications. Large scale use of non-reusable scrubbers would create the added problem of distribution, and disposal of the spent adsorptive material. The research undertaken in this project established that a regenerable process for CO2 removal from alkaline fuel cell feed air by refrigeration purification, using the cooling available from thermomechanical exergy recovery from liquid hydrogen, IS achievable. 6.1 Conclusions The experimental work conducted showed that CO2 removal from air to below 10ppm is possible using the proposed process. Water condensation and re-vaporisation which must occur as part of this process, has been demonstrated using a reversing heat exchanger. Regeneration for the heat exchanger in which the CO2 was deposited was achieved by allowing it to warm up through a temperature range of 18°C. The increase of the pressure differential between inlet and outlet air streams was linked to outlet CO2 concentration and thus offers a method for controlling regeneration timing. Heat transfer effectiveness was measured at 93%±2.5%. These results collectively indicate that the proposed CO2 removal process functioned as designed, with a 93% internal refrigeration recovery. The testing has demonstrated that even with a hydrogen-air mass ratio as low as that for normal alkaline fuel cell operation, it is possible to effect CO2 removal using exergy recovery if high effectiveness heat exchangers are used. With improved design of the cross-over valves and actuator used with the reversing heat exchanger, it is quitePDF 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 |