Just a thought...Why wouldn't shredded and dried tree branches and limbs work?
densified solid fuel is preferred since it can fuel a compact furnace, there is another factor water content of the pellets.
If you can use an auger it simplifies fueling since the pellets are considered discrete fuel.
You are right to a certain extent since
Why wouldn't shredded and dried tree branches and limbs
are run thru pelletizing machines.