I just spent an hour researching what someone on this list probably already knows how to do - I want to make a real cheap and simple method to pump a small quantity of h2 @ STP back and forth through a reactor. I intend to fill 2 sections of hose both connected to a small reactor tube with water and then stopper one end, stand up the stoppered end and stick the hydrogen producing electrode of an electrolysis pair into the submerged end until all the water is displaced by hydrogen. I then want to connect both end to two water filled U traps so I have the H2 hoses and reactor "trapped" between the U traps meaning I have water seals on both ends. The question is in the next step - assuming each trap has a vertical portion to vary the water column.. what is the easiest method to create a push pull where one trap goes down while the other goes up to draw the gas back and forth through the reactor? I was thinking a rube Goldberg arrangement with a little motorized balance beam raising a reservoir on 1 arm while lowering the reservoir on the opposite arm. This limited amount of H2 would reduce safety concerns and yet produces an "endless" stream of hydrogen passing through the reactor. Any suggestions? Fran
