How can I make clean hydrogen faster?

Read the beginning of my first post, nuff said.

 

And I've already got my filtration apparatus working with NaOH, so this thread is now OLD.

Well, you seem determined to huff this gas as if it were paint thinner. I still strongly advise you to not do so. Follow President Clinton's advice and don't inhale. There are real risks associated with this that are completely unnecessary for you to take. This is also the hallmark of a poor scientist or chemist; safety should always be first, you should never take an unnecessary risk such as this.

I hope you will be ok. For what it is worth, I can think of lots of better ways to demonstrate H2 is the lightest gas (i.e. a balloon ) than to inhale and listen to your temporarily high-pitched voice; assuming you are able to speak and/or scream after inhaling.

Next time, when you make an alkaline or acidic vapor (whether intentionally or not), are you going to inhale it to demonstrate it really is corrosive?