Carbon Filter the Exhaust? Can we make a low-emissions heater?

I am wondering if anyone with "real-life" rocket mass heater experience can tell me if they think filtering the exhaust air with carbon (maybe fine biochar?) would hinder the airflow so much that the fire would be difficult to light. I am wondering because I want to experiment with burning trash and other things that have nasty inks, bleaches, chemicals, whatever on them (with an ash cleanout, of course!)

Conner, i think your filter would hinder the flow big time, exept if it's huge.

I know that creosote is burned in a rocket, dyoxin too. A properly working rocket, even more a batch rocket should burn between 900C° and 1200C° on a regularr basis. Don't feed any of the nasties before it's hot, and you should be all right. Most of the organic or chemical compounds don't resist such temperatures.

And having lower CO than this http://donkey32.proboards.com/post/13489/thread

Would be complicated