PDF Publication Title:
Text from PDF Page: 064
Chapter 4 Nafion®/H-ZSM-5 composite membranes with superior performance for DMFCs The solid product was separated from the liquid phase by centrifugation at 9500 rpm (JOUAN B4i), washed twice with distilled water and centrifuged in order to reach a neutral pH. The recovered solid product was dried for 4 hours at 155°C and calcined at 550°C during 4 h with a slope up and down of 0.5 °C/min. The phase purity and dimensions of the calcined crystals were respectively characterized by X-ray diffraction and scanning electron microscopy. 2.3. Membrane preparation A predetermined amount of zeolite was added to 10 g of DMSO and sonicated for 1-2 h in an ultrasonic bath to disperse the zeolite. Then 50 g of DE2020 Nafion® dispersion was added and mixed vigorously for 1 h. After that it was cast on Teflon plate with a casting knife and placed in the fumehood for 18 hours. The obtained membrane was annealed at 150°C for 1 hour and then was peeled off from the Teflon plate. Membranes of dry thickness of 50μm and with zeolite content of 1, 3 and 5 wt.% of the dry Nafion weight, were prepared. Same method was followed to prepare pure DE2020 membranes, but this time no zeolite was added. Membranes were named as follows: DEZ X-Y, where DE, Z, X and Y stands for DE2020 Nafion, ZSM-5 zeolite, Si/Al ratio of the zeolite and the weight percentage of the zeolite, respectively (i.e. DEZ 75-3 is DE2020 membrane containing 3 wt.% of ZSM-5 zeolite with the 75 Si/Al ratio). 2.4. Membrane characterization Scanning electron microscopy (SEM) Membranes were visualized by a scanning electron microscope (Jeol JSM 5600LV). The membrane samples were sputtered with a thin layer of gold (30 nm) using a Balzers Union SCD 040 sputtering device prior to the SEM observation. Swelling degree (SD) Membranes were dried in the vacuum oven at 30°C for 1 day and then immersed in ultra pure water. The weight of wet (Weightwet) and dry (Weightdry) samples were measured. The SD of the membrane was calculated using: 56PDF Image | Development of membrane materials for direct methanol fuel cells
PDF Search Title:
Development of membrane materials for direct methanol fuel cellsOriginal File Name Searched:
thesis_H_Yildirim.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)