Hydrogen / oxygen cell design with gas separation 

Two layers of a simple synthetic fabric. Not sure about the exact material

I wonder how to do it :) any easy methods in mind?

@@CoalitiaNaturaRomania should be able to just make a column out of some pvc pipe with outlet at top for hydrogen and one at the bottom for oxygen. feed it in about 1/4 the way from the bottom slowly. hydrogen and oxygen have very different densities so they will separate in the pipe.

Interesting solution, seems way to easy. I wonder if if they separate quickly enough just by their weight. I will let you know how this works

@@dodiezresibemol you will have to adjust the flow rate so there is no turbulence and if you can make some kind of diffuser on the inlet inside the pipe that would reduce mixing too. varying the diameter of the pipe will have an effect too. you can verify the purity of the hydrogen by how it combusts, collect some in a test tube and light it. I would make a static ground for the setup to be safe.

@@dodiezresibemol you could use small garbage bags to make the column, just support them with hoops, the hydrogen should even make the bag float at the top. if there is any ignition the bag will harmlessly come apart too.