Sounds a lot like how they make Activated Charcoal from Coconut Hulls. Burn them and then remove the oxygen. It creates huge amounts of surface space which wants to clings to bad stuff in your gut. Comes in handy if you've eaten something that's making you sick.
I can't wait to see the process of making the biochar!
That's neat. High surface area to the rescue! Love to hear all the uses for charred biomass. Next post in progress...