A Plug-in Hybrid which drives 80% in electric only mode needs only for 20% longer travels outside the electric range fuel. At only 3,5 litre Diesel/100km for the range extender, the wood usage is reduced to 3,5 kg wood/100km.
Stretch bimass by hydrogen
At the current production method, wood provides the energy for the chemical reactions to produce the Diesel similar fuel. But it comes the time, where we have by far not enough biomass for this luxury, but electric power by solar energy more than enough.
The wood is seen only as a carbon supplier. Hydrogen is produced by solar electric power and electrolysis. Methan or Methanol for the range extender. So the necessary wood is reduced to 0.8 kg/100km. The effort to make methan from wood is in the moment unknown, provisionally estimated with 8 to 12 kWh for this 0.8 kg wood.
0.8 kg wood and 20 to 24 kWh electric power for 100km. An optimization for the demand of biomass of 1:30.