Integrating bio-oil production from wood fuels to an existing heat and power plant - evaluation of energy and greenhouse gas performance in a Swedish case study

Combined heat and power (CHP) production in combination with a district heating (DH) grid gives an energy-efficient use of wood fuels. The demand the DH will, however, decline coming decades, operators are seeking additional sinks. In this case study, integration pyrolysis unit into existing CHP plant was investigated as possible solution. retrofitted makes excess yields liquid bio-oil. Pyrolysis integrated shown to give net energy yield at least 80%, decrease output grid. carbon footprint delivered very low maximum 1.6 g CO2eq/MJ. Prolonging operation periods without delivery would increase installations, but cost decreasing 63–70%. Up 2.8 PJLHV/yr crude bio-oil could be produced plant. have footprint, 1.7–4.0 CO2eq/MJLHV, which it attractive for rapidly expanding transport biofuel market.