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Topic: Which salts can be burned ?  (Read 2123 times)

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Offline megatron000

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Which salts can be burned ?
« on: June 09, 2016, 02:28:38 PM »
Are salts containing carbon,nitrogen or sulphur susceptible to combustion? Where can I find more about this ?

Offline Enthalpy

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Re: Which salts can be burned ?
« Reply #1 on: June 09, 2016, 05:38:27 PM »
There are certainly many. If you take the salt of a big amine and one chlorine atom, the many carbon and hydrogen atoms can still burn. Or the salt of a fatty acid and one sodium atom.

I just wonder now why soap doesn't burn at a lighter's flame. Probably a matter of flash point. I should have tried with a wick or by pre-heating the soap.

Offline AWK

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Re: Which salts can be burned ?
« Reply #2 on: June 09, 2016, 11:54:04 PM »
(NH4)2Cr2O7 burning.
AWK

Offline megatron000

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Re: Which salts can be burned ?
« Reply #3 on: June 10, 2016, 09:41:10 AM »
I appreciate the replies. Volcano looking good +)

There are inorganic salts that burn (sulfides, carbides I think...)
But there are others which do not, like NaCl.
Would this be related to possible NOX values the salt ânion can accomodate ?

Offline Enthalpy

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Re: Which salts can be burned ?
« Reply #4 on: June 12, 2016, 03:48:42 PM »
I expect no simple relation with one single number.

By "salt containing carbon, nitrogen or sulphur", do you mean "only these elements"? Because "containing some" without a minimum proportion is no constraint.

Offline Arkcon

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Re: Which salts can be burned ?
« Reply #5 on: June 12, 2016, 04:56:58 PM »
Like Enthalpy said, its easy to understand the words of your question, but hard to know what its menat to ask.

Ok, hydrocarbons tend to combust well. Add a few other atoms in, like sulfur, nitrogen and oxygen and they still combust well.  What about iron EDTA?  That's a large organic molecule, with iron in it, so its going to leave lots of ash.

If you allow that, then almost anything counts.  If you disallow that, then when oxygen is lacking, everything fails to burn.  So we can't figure out the limits.

AWK: showed you ammonium dichromate burning.  Also, elemental magnesium burns, but its neither organic or a salt.  Heck, iron filings will burn in a pure atmosphere of oxygen.

SO I don't think you're going to find a comprehensive listing.
Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

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