chemical heat production

[iota]

Hello,

I am trying to generate heat by chemical means.
So far I know:
aluminum + hydrochloric acid
water + quicklime (calcium oxide)
...

[PITMIX]

Water and carbide produce fuel.
http://perso.orange.fr/maximum.carriere/lampe.htm
Great for visiting caves especially when you crawl through a 30cm high passage and the lamp goes out ...
What do you want to heat ??

[iota]

Thank you pitmix!
how is the carbide obtained?
It is to heat my peltier modules

[aidiv]

hello, apparently we find quicklime in bags of 20kg to 10 euros; it rises to 400 degrees when you add water.

So if I understood correctly: quicklime is obtained by heating calcium cabonate in order to extract the co2.

to extinguish quicklime, it is soaked in water.
once extinguished it is used as plaster or cement it will harden by absorbing the co2 contained in the atmosphere

the question I ask myself is how long can 1 kg of lime heat up?
A block of quicklime is placed in a container equipped with a valve allowing the steam to come out but not letting the air enter to avoid contact with the co2.
water is added several times in relation to the heat demand. once the lime is extinguished (knowing that we have made sure that it does not come into contact with the co2 it must not turn into calcium carbonate)
if we remove the water by heating (for example a day of beautiful sun
does it turn back to quicklime?

[iota]

can you find quicklime easily?
did not capsize.

How long can lime heat up?
if we do a drip it can last a long time in my opinion ...
I do not believe that it becomes alive again once it is extinguished.

[antoinet111]

hello, apparently we find quicklime in bags of 20kg to 10 euros; it rises to 400 degrees when you add water.

you can even find me dear, but the problem may be the dosage to optimize your peltier module (range 60 to 73 ° C max) qques drops of one, qques grams of the other ...

but the residues created and the gases, would there be a way to recover all these losses, without polluting or becoming intoxicated?

[antoinet111]

The chemical reaction of slaking quicklime by hydration is:
CaO (quicklime) + H2O = Ca (OH) 2 (slaked lime) + calories,

therefore as there is no additional material in the result I suppose that there is no gas rejection.

please correct me if there is an error in my calculation.

[iota]

there is not a rejection of co2?

note in the self-heating rations (quicklime + water), I believe that the device is waterproof, so if there was a release of gas it would explode ...

an example:
http://www.strategies.fr/archives/1191/ ... ttes_.html

[PITMIX]

Thank you pitmix!
how is the carbide obtained?
It is to heat my peltier modules

Carbide I don't know, I used it when I was 14 in summer camp in the Pyrenees to go caving.
Your Peltier module comes from "Conrad"?
http://www.ecole-francaise-de-speleolog ... arbure.htm

[Other]

Hello
You were wise Pitmix
Carbide in my youth was used to make acetylene and something less Catholic ....
But we are on a forum econology .. one should not aim for the Blessed bread.
I was less wise ... I have always been interested in rapid combustions, now I understand better why it takes more or less ahead of the engines and I also know what it means to click, and mass combustion on an engine.

Andre