[Terrapreta] Charcoal properties

[Jeff Davis]

On Monday 12 March 2007 10:55 am, Sean K. Barry wrote:
> A simple question, I hope.  Since hot charcoal will reduce FeO3 (rust), is
> there any reason why a biomass pyrolysis "fire-tube" would need to be made
> of stainless steal?  Or, would simple steel pipe work as well?

Hi Sean,

My HeatHut (outdoor furnace) is made from 55 gallon drums and has not burned 
out for four years (about). Once a day, I would say, it gets hot enough to 
glow red so at this temp plus some CO has caused me to wonder if the FeO 
reaction comes into play? It runs about 7 months a year.

I would think at the lower temps that a steel kiln would see one would have a 
rust problem.

Not sure what kind of "fire-tube" you refer to.


Jeff




-- 
Jeff Davis
Somewhere 20 miles south of Lake Erie, USA