Safe Endothermic Reaction
Safe Endothermic Reaction
(OP)
I have a need to temporarily keep a liquid cool where there is no available external power supply. For this particular application making use of an endothermic reaction would be a good solution. But I would like for it to be safe. A couple of possible reactions is to dissolve Potassium or ammonia chloride in water. Is anyone able to suggest alternative reactions that require more energy and therefore be more efficient, but still use 'safe' chemicals?
Apologies if this request is not clear, but I am no chemist - if you need further information let me know and i will elaborate.
Thank you in advance for your assistance.
Apologies if this request is not clear, but I am no chemist - if you need further information let me know and i will elaborate.
Thank you in advance for your assistance.





RE: Safe Endothermic Reaction
RE: Safe Endothermic Reaction
RE: Safe Endothermic Reaction
TTFN
RE: Safe Endothermic Reaction
Vaporization of liquified gases would probably provide sufficient cooling for moderate amount of liquid. The disposal issues could be more easily taken care of for a liquified gas like carbon dioxide or nitrogen. The use of propane, butane, or ammonia would require burning, processing, or recovery of vapors. Fluorocarbons would be prohibitive from a cost and environmental aspect.
There are small compressed air units (Vortec tubes) that are used for some instrument cabinet cooling applications.
www.exair.com
and discussed in thread391-91020.
RE: Safe Endothermic Reaction
A lot of insulation means less cooling required.
The dry ice and liquid nitrogren would certainly be "safe" chemically, depending on amount - but handling will be more hazardous than simply ice (frozen water).