Semipermeable Membranes: Questions & Solutions

[pneese973]

I have 2 questions related to the use of semipermeable membranes.

1) I'm using electrolysis to split water, but I'm wanting to separate out the hydrogen and store it separate from the oxygen for safety reasons. I'm wanting to use the hydrogen later for things such as fuel for my cookstove, furnace, and to power a fuel cell. The question that I have is, where can I get a suitable semipermeable membrane that will filter out the hydrogen and allow for say 20lpm of gas production (not on a consistent basis, but could at times be this high)?

2) I have a fairly large supply of about 4" discs that are coated with about 50% platinum, 30% cadmium, and 20% rubidium. I'm looking at using these to construct my own fuel cell(s). Once again, I'll be in need of a semipermeable membrane suitable for this. I'm assuming the one that is found in question 1 above will also be suitable for this application, but just throwing the question out there.

 

[Achy47]

Hello, thank you for your questions. It sounds like you are working on some interesting projects involving electrolysis and fuel cells. In regards to your first question, there are several places where you can purchase suitable semipermeable membranes for separating hydrogen gas. Some options include online scientific supply stores, specialty membrane manufacturers, and even some hardware stores. It's important to make sure that the membrane you choose is compatible with hydrogen gas and can handle the flow rate you require. You may also want to consider the thickness and material of the membrane to ensure it can withstand any potential pressure differentials. Additionally, you may want to consult with a specialist in this area to ensure you are using the most appropriate membrane for your specific needs.

For your second question, the semipermeable membrane used in question 1 may also be suitable for your fuel cell application. However, it's important to consider the specific requirements and operating conditions of your fuel cell to determine if this membrane will be the best fit. You may also want to consult with a fuel cell expert or do further research to determine if there are other membranes that may be better suited for your specific setup.

I hope this helps answer your questions and good luck with your projects!