Is Liquid Carbon Dioxide a good propellant for Aerosol Sprays?
Thank you very much!
Answer:
Yes Good, But it Will Still Light Because Nitrogen & C02 Has Not Change To Liquid, Before Around 100 Bar, Different With Lpg, Low Pressure 2 Bar Already Change To Liquid, Or High Pressure 5-7 Bar Already Change To Liquid, So Many Product Use This Type Of This Gas Now, Our Can Or Wd-40 Can Just Only For Max !5 Bar, So You Must Add More Liquid For Your Aerosol Product, (i Know it is More Expensive, But You Can Reduce Cost Of Lpg), Give More Liquids Too Peoples, Reduce Cost Of Lpg, it Was Dangerous, it Can Explode. Because it Was Flammabble Type Of Gas. Best Regards EddyLim777@yahoo.com.sg
Three problems with CO2 as a propellant.
One is that, as it expands, it can give a thermal shock so it may not be suitable for something like hairspray, for instance. This also sometimes causes freezing problems in the delivery system.
The second problem is that CO2 is toxic in high concentrations and can be lethal if ingested. In an enclosed space, it is also possible for CO2 to lower oxygen concentrations to a level that won't support life. So using it in an enclosed space (small bathroom) could have problems (unlikely but possible).
Thirdly, CO2 is a greenhouse gas.
There are many other commercially available propellants - you should contact a company like DuPont or Great Lakes Chemicals who will be able to advise. I work in the fire trade and we use a DuPont product called FE227 for extinguishing fires. It is stored as a liquid and is also used as a propellant in asthmas inhalers.
**EDIT**
CO2 will freeze at different temperatures, it depends on the flow rate to a large extent. Where CO2 is forced to go through small apertures it has a tendency to freeze solid - so a spray is going to be a problem.
DuPont operate globally - what country are you in ?
The answers post by the user, for information only, FunQA.com does not guarantee the right.
More Questions and Answers: