Table 1 Comparison of GHG emissions reduction (including fossil fuel offset) for pyrolysis systems with sequestration or use of biochar as fuel and use of other biofuels and products.
Study | Process | Product applications | GHG emissions reduction intensity (g CO2-eq MJ−1) |
|---|---|---|---|
This study | Biomass pyrolysis poly-generation system Temperature: 600 °C Residence time: >1800 s | Biochar: soil application Pyrolysis gas: substitution of coke oven gas and electricity production Bio-oil: substitution of coal tar in chemical raw materials | 136.45 |
Biochar: charcoal substitution in industries Pyrolysis gas: substitution of coke oven gas and electricity production Bio-oil: substitution of coal tar in chemical raw materials | 46.80 | ||
Peters et al.28 (Spain) | Biomass slow pyrolysis system Temperature: 450 °C Residence time: ~2500 s | Biochar: soil application Pyrolysis gas: heat production for pyrolysis system and substitution of natural gas Bio-oil: heat production for pyrolysis system | 122.18 |
Biochar: charcoal substitution in coal power plant Pyrolysis gas: heat production for pyrolysis system and substitution of natural gas Bio-oil: heat production for pyrolysis system | 63.22a | ||
Roberts et al14. (the United States) | Biomass slow pyrolysis system Temperature: 450 °C Residence time: long enough | Biochar: soil application Pyrolysis gas: substitution of natural gas for heat product | 108.57 |
Biochar: charcoal substitution in IGCC plant Pyrolysis gas: substitution of natural gas for heat product | 36.64 |
