Background- I make biochar for gardening, and small scale carbon capture and storage. Most of my feedstock is clean, unpainted, untreated, end of life timber, but there is a small proportion of engineered particle board- MDF, chipboard, plywood and composite blocks containing, I believe, melamine formaldehyde binding resin. No halogens from PVC, no metals from CCA treated timber or old lead paint. I want to establish what pollutants may be produced- I would in a worst case scenario be burning less than 50kg of the suspect material per hour.
All the charring happens in TLUDs- Top Lit Up Draft burners where all the pyrolysis gases are ducted through the hottest zone of the burn- round about 800-900C. I'm currently working to improve residence times and temperature gradients- carbon particulates are a known issue.
Does any of the above sound like it'll produce anything nasty from the carbon, hydrogen, oxygen and nitrogen going into the mix? PAHs? Anything else above and beyond nitrogen oxides and carbon particulates from clean wood?
To put it another way, do I err in favour of creating a pollution factory, or in favour of condemning a potential feedstock to be a disposal nuisance?
Thanks for any replies- I'd like to lay this to rest.