metalresearcher - 27-1-2014 at 12:14
Sometimes when I use my blowtorch (e.g. when it is in a small furnace just started and the lid is closed) a strange smell appears of 'unburnt gas'. It
appears that too few air is added. It is not really pungent, but a distinctive smell which differs from a typical gas smell.
What is this ? Really an incomplete combution ? But incomplete combustion results in CO which is odorless, so what has such a smell ?
bfesser - 27-1-2014 at 12:22
<a href="http://en.wikipedia.org/wiki/Ethanethiol" target="_blank">Ethanethiol</a> <img src="../scipics/_wiki.png" />
Pyro - 27-1-2014 at 12:47
it is added to most gasses so that they can be smelt if they are leaking.
TheChemiKid - 27-1-2014 at 13:29
Wouldn't the ethanethiol burn as well, it has a NFPA 704 flammability rating of 4.
DraconicAcid - 27-1-2014 at 13:31
Yes, it would also burn.
The only time I've smelled unburned gas when using a propane torch, it was leaking from the valve.
Pyro - 27-1-2014 at 13:34
I like the smell for some reason...
Zyklon-A - 27-1-2014 at 13:52
I like it too... same with unburned gasoline, and a few other similar smells.