How Palladium Membrane Purifiers Work
Palladium membrane hydrogen purifiers operate via pressure driven diffusion across palladium membranes. Only hydrogen can diffuse through the palladium. The palladium membrane is typically a metallic tube comprising a palladium and silver alloy material possessing the unique property of allowing only monatomic hydrogen to pass through its crystal lattice when it is heated above nominally 300◦ C. The hydrogen gas molecule coming into contact with the palladium membrane surface dissociates into monatomic hydrogen and passes through the membrane. On the other surface of the palladium membrane, the monatomic hydrogen is recombined into molecular hydrogen – the ultrapure hydrogen used in the semiconductor process.
Palladium purifiers provide
if it is for experimental purpose, you can try using aluminum foil/can and some NaOH as catalyst.
You have to define inexpensve. Low capital or low opering cost and for what scale. For laboratory scale H2 cylinders or small electrolyzers are used.
I would suggest you read some of the recent papers by Prof. Mohindar Seehra (Department of Physics, West Virginia University) on catalytic and carbon-assisted electrolysis of water.
Http://www.ucc.ie/academic/chem/dolchem/html/elem001.html
are your standard methods...
To produce hydrogen you require energy. Thus, the cost of the energy source determines the cost of hydrogen. Add to that the efficiency of the process you use to split water and your final cost may be two or three times the cost of the source energy. For instance, assuming that you produce thermal energy from natural gas, hydrogen can be produced through electrolysis (3/0.2 $/GJ); Thermochemical (3/0.4 $/GJ); or steam reforming (3/0.8 $/GJ). In the brackets, 3 $/GJ is the approximate current cost of natural gas. 0.2 is the overal efficiency of electrolysis from natural gas to hydrogen; 0.4 is the overal efficiency of thermochemical from natural gas to hydrogen; and 0.8 the overall efficiency of steam reforming from natural gas to hydrogen.
Check SPIE papers on direct solar energy conversion of water to hydrogen
Not really sur about what your are trying to do, your post is from July... you may have moved a long way buy now. As a chemist, being able to generate H2 would be great. H2 cylinders are a NO NO in laboratories unless properly set up. laboratory H2 generator are available but..... The Ucube is around 20000 AUD!... what is left.
not much really, an alternative would be to buy a cheap H2 fuel cell and run it on car batteries or car charger...
The cheapest way, not for free, is to use electrochemical industries for metals refining. For example electrochemical zinc or titanium refining facilities. The other way is to use nuclear facilities in order to use the radiolitic reaction due to radiation, and using membranes separate the hydrogen from steam and oxigen. Now i am working in a project about this.,
What do you mean Paladium? as a filter? Cartridges filed with Paladium?
How Palladium Membrane Purifiers Work
Palladium membrane hydrogen purifiers operate via pressure driven diffusion across palladium membranes. Only hydrogen can diffuse through the palladium. The palladium membrane is typically a metallic tube comprising a palladium and silver alloy material possessing the unique property of allowing only monatomic hydrogen to pass through its crystal lattice when it is heated above nominally 300◦ C. The hydrogen gas molecule coming into contact with the palladium membrane surface dissociates into monatomic hydrogen and passes through the membrane. On the other surface of the palladium membrane, the monatomic hydrogen is recombined into molecular hydrogen – the ultrapure hydrogen used in the semiconductor process.
Palladium purifiers provide
My god I have no words, ...... THANKS A LOT, what a great lecture. I appreciate your time, trying to "educate" me. Again big thannnnkkkkssss from dowunder.
You can use the excess power (or heat) from other processes to heat steam and use a solid-oxide fuel cell to separate the H2 and O2.
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