Ah, MrTeslonian...
He has some pretty awesome videos making cool stuff from bits and bobs.
I really liked his series on fractional distillation from
wood gas which that video is part of.
I was wondering if a similar setup could be incorporated into a
rocket mass heater. You could make your liquid fuels,
feed back the leftover gasses to the
RMH, and have
biochar as a by-product.