Cup 15, whats most efficient way to freeze my ethanol?

[Thedistillator]

Hello, my fellow 4200’rs

I am building out an ethanol extraction area and we are purchasing a cup 15 They have a standard use of Kegs with ports. How would you go about efficiently freezing ethanol at large quantities? Walk-in freezer? What about a container that jacketed for a condenser unit that allows me to fluctuate temperatures. What have you guys used to efficiently freeze your ethanol for cup15?

[cyclopath]

You want to chill your ethanol.

If you freeze it, it doesn’t flow worth a damn

There is a LOT of discussion around here on the subject, if you haven’t spent a week or two reading it, you should.

Search results for 'chiller ethanol' - Future4200 should get you started.

If you haven’t already seen this Ethanol Extraction White Paper you may want to start there.

And I’ve left my math lying around…

@cyclopath

Here’s what I used to size my chiller.

Ethanol = 46g/mol

has a heat capacity of 112J/mol.K

and a density of 0.7893g/cm3

1gal = 3785.41cm3 (mls)

=> density = 2990g/gal

=> 100gal = 299000g

=> 299000g/46g/mol = 6500mol.

to lower by 6500mol by 40 degrees C (or Kelvin) would be 40 * 6500 * 112 = 29,120,000J = 29,120kJ

you can then pick a time frame in which you want to remove that heat, and size your chiller (convert to BtU).

Note: liqN2 is cold enough to actually freeze EtOH. Dry ice or liq CO2 are not