Impact of inert on flammability of submicron aerosol
Impact of inert on flammability of submicron aerosol
(OP)
How might one determine the flashpoint change of a submicron aerosol of a liquid with a defined flash point due to a given addition of an inert gas?





RE: Impact of inert on flammability of submicron aerosol
HAZOP at www.curryhydrocarbons.ca
RE: Impact of inert on flammability of submicron aerosol
However, mechanically formed mists are apparently more dangerous. I read that in experiments with larger drops (about 0.2 mm) the LFL was found to be less than 1/10 the normal LFL value. This is an important factor when inerting in the presence of mists.
With droplets having diameters of 0.6 mm up to 1.5 mm flame propagation is considered impossible. However, disturbances than can shatter large drops can create hazardous conditions.
Follow owg's advice.
RE: Impact of inert on flammability of submicron aerosol
My interest is with aerosols in the 0.3 to 10 micron range. Where might I find elaboration on the rationale for their 'normal' LFL?
RE: Impact of inert on flammability of submicron aerosol
I’ll see if I can find the author of the work and if there was anything published.
As mentioned in previous posts the inert gas producers did have a lot of information on inerting.
Also check Texas A&M.
Also again check on nebulizers. There was a lot of work done on creating different droplet sizes and dispersions by eans of nebulizers. A lot of the work was with increasing flame efficiency.
RE: Impact of inert on flammability of submicron aerosol
The LFL is usually published at 25 degC conditions but if you have a higher temperature it will be less than that, in roughly linear proportion to the temperature difference between 25 degC and the adiabatic flame tmperature I mentioned above.
Always bear in mind that this is an estimate so use a factor of safety. I have previous put this estimation on the web as an Excel spreadsheet at www.geocities.com/flareman_xs/Gases/Flammability_calc.h....
[You will need IE5 and Excel on your PC]
David