"Ignoramus27780" wrote in message
...
I bought a forklift today. It is a 30,000 lbs forklift with a diesel
engine.

To make it more palatable indoors, I would like to find some way to
scrub/purify exhaust gases. Can I add something, like a catalytic
converter, DEF box, afterburner, or some such?

Its been a long time since all the warehouses that used to use propane
indoors (much cleaner than diesel) went all electric. Even if you modernize
it, you are still putting out way to much in emissions to be running it
indoors. I think it was in the late 70s or early 80s that lots of propane
forklifts hit the market because all those outfits got told they couldn't
use them indoors anymore.