drygas or anti H2O for methanal?  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> RC Fuels >> drygas or anti H2O for methanal?
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drygas or anti H2O for methanal? - 8/28/2003 6:35:55 PM   
SpaceCase



Posts: 299
Joined: 8/18/2002
From: norwich, VT, USA
Status: offline 		Anyone know a additive to take out, inhibit the absortion of H2O into methanal?
       Post #: 1

drygas or anti H2O for methanal? - 8/28/2003 6:59:47 PM   
RaceCity



Posts: 1842
Joined: 7/10/2002
From: NotUpNorth, USA
Status: offline 		Keeping the lid sealed tightly is the best method.

As for getting the water out? Geez...that could be tough. I've read where it can be removed by freezing the fuel and since the water will freeze before the alcohol....it can be strained out in this manner.

I don't know if this works or not Just repeating what I've heard.

You might try it with a pint of fuel and see what happens.

'Race

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drygas or anti H2O for methanal? - 8/28/2003 8:51:35 PM   
Ross Kean



Posts: 686
Joined: 6/4/2002
From: Fredericton, NB, CANADA
Status: offline 		Freezing is far more likely to drop oil, not water, out of the mix!! Simple freezing will not separate the water. I can think of two things that might be used to purify mixed fuel:
1) fractional distillation would allow you to distill off the methanol. The nitromethane, unfortunately, has a boiling point almost identical to water and would be difficult to separate cleanly. The oil has a very high BP and would be left behind to be recombined with the purified methanol. You would still have to deal with cleaning up the water/nitromethane fraction - possibly with a conventional dessicant.
2) Molecular sieves (artificial zeolites) Type 3A may be used to remove moisture from methanol and mixes of heavier compounds. The molecular sieves can be regenerated after use by heating to a high temperature. Not very practical unless you have access to a laboratory.

The best bet is to keep the fuel dry in the first place!

Ross

(in reply to SpaceCase)
       Post #: 3

drygas or anti H2O for methanal? - 8/29/2003 5:56:30 PM   
SpaceCase



Posts: 299
Joined: 8/18/2002
From: norwich, VT, USA
Status: offline 		How boaut dry gas, I know its not soluble in methainal but if you used a small amount of gas wthith the dry gas?

(in reply to SpaceCase)
       Post #: 4

drygas or anti H2O for methanal? - 8/29/2003 8:49:45 PM   
Ross Kean



Posts: 686
Joined: 6/4/2002
From: Fredericton, NB, CANADA
Status: offline 		As far as I know, the "dry gas" additives are just alcohol (usually isopropanol) which acts as a co-solvent between water and gasoline so the water will mix with the gasoline and not freeze out in the line. It doesn't actually remove the water and would do nothing for your fuel. Do you have any specific information regarding brands or manufacturers? You could probably deduce the composition from the MSDS sheets for the product. In essence, if the product is an alcohol co-solvent (methanol, isopropanol or ethanol), it will not improve "wet" model fuel.

Ross

(in reply to SpaceCase)
       Post #: 5

drygas or anti H2O for methanal? - 8/29/2003 8:58:15 PM   
Chris300s



Posts: 309
Joined: 12/15/2001
From: Mount Clemens, MI, USA
Status: offline 		The reason that the fuel has water to begin with is because it's pretty close to being dry gas its self! At least the alcohol portion, its hydrophalic, water loving.

(in reply to SpaceCase)
       Post #: 6

drygas or anti H2O for methanal? - 9/2/2003 8:29:07 AM   
rctimm99


 

Posts: 146
Joined: 3/18/2002
From: Gilbert, AZ, USA
Status: offline 		Power Masters made a product that was some gas which you spray into your contianer, displacing any "air" (then you capped it) I would think keeping your tanks full or just dispalcing the air would keep the H20 out...
Tim

(in reply to SpaceCase)
       Post #: 7

drygas or anti H2O for methanal? - 9/3/2003 4:53:38 PM   
yakman


 

Posts: 159
Joined: 1/16/2003
From: Brisbane, AUSTRALIA
Status: offline 		lol. There is no alcohol group on methanal, it is an aldehyde.

(in reply to SpaceCase)
       Post #: 8

watered up fuel - 9/3/2003 5:03:49 PM   
BALSA BANDIT


 

Posts: 159
Joined: 12/7/2001
From: POMPTON PLAINS, NJ, USA
Status: offline 		One of the best ways to keep water from your fuel is to never leave it in the sun after use. It it never gets warm then it will never cool down, thats one of the ways for vapor to enter the fuel bottle.

(in reply to SpaceCase)
       Post #: 9

drygas or anti H2O for methanal? - 9/3/2003 6:17:35 PM   
Chris300s



Posts: 309
Joined: 12/15/2001
From: Mount Clemens, MI, USA
Status: offline 		I may be wrong but isn't methanal formaldehyde? And isn't what we run in our fuel methanol? Methyl alcohol?

(in reply to SpaceCase)
       Post #: 10

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