Friday, May 24, 2013

Preparation of calcium carbonate

quote from Wikipedia

calcium carbonate is prepared from calcium oxide. Water is added to give calcium hydroxide, and carbon dioxide is passed through this solution to precipitate the desired calcium carbonate, referred to in the industry as precipitated calcium carbonate
comment:

I'm interested in seeing if carbon dioxide can be separated from ammonia this way.  A problem may arise since ammonia is attracted to water.  If this was easy, it would have been done.  Instead, a more complex method has to be adopted.

But I am still wondering if it's possible to use a canister like in the Apollo program.  If the canister is made without too much water and plenty of surface area, it will absorb the carbon dioxide and leave the ammonia behind.  I'd wonder if the absorption rate would be high enough to get all of the carbon dioxide and so forth.

Let's say you have a 100 lbs of ammonium carbonate.  How much mass of the lime putty ( I assume ) would it take to absorb the mass of carbon dioxide, which makes up about half the mass of the ammonium carbonate.  You would think an equal mass, but it may need to be more.  Maybe much more.

The mass of calcium hydroxide is about 3/4 that of ammonium carbonate.  This would be used to capture the carbon dioxide.

Running out of time. Will continue later.


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