Stobarts Biomass

[Tom D]

I think the big issue is that chlorine forms dioxins when burnt..

 

I'd love to know where in the wood its coming from, is it the bark?

[openspaceman]

I think the big issue is that chlorine forms dioxins when burnt..

 

I'd love to know where in the wood its coming from, is it the bark?

 

I don't know which parts of the tree have chlorine compounds but it is going to be concentrated in the bark buds and leaves, I think hardwoods have more than softwood but don't know whether this is in foliage or when leafless. Some is likely from contaminants deposited from the atmosphere, salt could be one of them.

 

I don’t see a ready path from common salt to dioxin at the temperatures in a hot water boiler, it is more likely formed in the incomplete secondary burn where a chlorinated hydrocarbon starts burning but finds another radical to make a dioxin. The way to avoid this is to reach higher temperatures to dissociate the molecule and allow HCl to form then quench rapidly but of course this is corrosive.