I have not heard Bluefire talk about using kemp as a raw material, nor the intention of them to produce anything but sugar and/or ethanol, although they have mentioned the possibilities of producing a few other chemicals that sugar could be converted into.
Also, while kemp may be produced at a much higher tonnage per acre, it still wouldn't compete with a process that could utilize materials that would otherwise be discarded.
So far as I can find out, the Bluefire process utilizing concentrated strong acid and trash for raw materials is probably the lowest cost way to produce sugar and all the compounds it can be converted into.
