Electrolysis is super-expensive and slow. Industrially oxygen can be extracted cheaply using fractional distillation of air, but it can't be scaled down for individual welders.
Cool idea. I would be interested in knowing the concentration you achieve and flow rates (LPM/CFH). This wouldn't work in my workshop as we don't treat our equipment nicely enough and we don't have sparkies to tend to it.
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[ 3.4 ms ] story [ 29.1 ms ] threadI was surprised how quickly the cycle happens between media beds (every few seconds).
I wonder what the energy budget is vs electrolysis. It's probably orders of magnitude cheaper (albeit a bit dirtier).