I have one that I made and it works pretty good aside from the large(in my eyes) amounts of reagents needed to use it. I mostly use it for producing
ammonia and it works great but the only gripe I have with it is the gas continues to be produced even after the pressure has built to point where the
reagents are no longer mixed. This leads to gas, NH3 in my case, being leaked from it for sometime after. However it will store pretty well and is
ready for use when I want to use it again.
Mine is a slight modification of the norm made from ABS pipe and I believe I have pictures somewhere detailing it I just have to find them in the mess
of files I was able to recover when my computer crashed.
The basics where a small diameter tube caped at the bottom with a bunch of small holes in it to allow the liquid to flow in. This was filled with a
solid reagent, Ammonia nitrate in my case. This is placed in a larger tube capped off as well with a small vent on the top and filled with NaOH
solution. As the Ammonia nitrate in the tube reacted and produced the gas it would create a pressure pushing the NaOH solution down and away from
reacting with the Nitrate. When the top was open it would release this pressure and allow the gas to escape.
I have to run now but I will look for the pictures since a picture is worth 1000 words and I suck at explaining things.
~SeditVogelzang - 13-11-2009 at 13:34
I had a big one that broke when the shelf it was on collapsed. I got another smaller one after that.User - 14-11-2009 at 06:15
@sedit
Please do, I am always interested in diy lab material.Eclectic - 14-11-2009 at 06:39
There ya go, That was my inspiration right there. I made mine smaller and suggest much smaller holes in the bottom of the center tube since I was
having problems with reagent falling leaking into the solution causing issues. I solved the problem with a light packing of fiberglass at the bottom.Vogelzang - 14-11-2009 at 16:18
I found this in the library a couple years ago.
Chemical Testing of Wines and Spirits by J. J. Griffin
I'am building a ceramic model of a kipp generator. it will be the more simple 2-part version with vertical stop-cock. a simple super food safe glaze
will be used as it should be the least reactive, and yet seal the clay with the silica.
i will post a pic when done....but if you have access to a ceramic studio it is surprising the amount of equipment that can be made.User - 5-12-2009 at 06:01
What kind of coating are you using.
I can imagine that for example HCl gas would not be a nice walk in the park for ceramics.Vogelzang - 6-12-2009 at 08:03
Some interesting gas generation patents:
US 1017495 gas generator
US 3585007 gas generator
US 2623812 Production of hydrogen
US 3348919 Process for producing hydrogen from finely divided metals and water at ambient temperatures
US 3996342 Method for thermochemical production of hydrogen from water
I2 -> HI
US 4005185 Method for hydrogen generation
What kind of coating are you using.
I can imagine that for example HCl gas would not be a nice walk in the park for ceramics.
Why do you suggest that? Thats like saying HCl and sand are a bad combination.User - 6-12-2009 at 11:44
Your got a point there, I was directly thinking of a concrete/HCl combination.
Somehow I assumed a reaction like that would happen without thinking about the fact that ceramics can exist out of tons of different materials.
Still incompatibility has to be considered when using reactive gas. Mildronate - 2-4-2010 at 07:24
I have one 500ml, sometimes i use it for some gases. Sometimes i use one biger (1000ml) with my friends from chemistry university for smoking (its
like like water pipe )
)