From: Life-cycle analysis of greenhouse gas emissions from renewable jet fuel production
Technologya | Feedstock | Energy allocation | Reference | Displacement method | Reference | ||
---|---|---|---|---|---|---|---|
This study | Prior studies | This study | Prior studies | ||||
g CO2eq /MJ | g CO2eq/MJ | g CO2eq/MJ | g CO2eq/MJ | ||||
HEFA | UCO | 28 | 17–21 | [68] | 28 | – |  |
 | Jatropha | 55 | 37–55 | 21 | −134 to 63 | ||
 | Camelina | 47 | 18–47 | 44 | −17 to 60 | ||
FT | Willow | 9 | – |  | −7 | −17 to 10 | |
 | Poplar | 10 | – |  | −6 | −17 to 10 | |
 | Corn Stover | 13 | 8–11 | [28] | −3 | 9 to 14b | |
 | Forestry residues | 6 | – |  | −10 | 10 to 12b | |
HTL (in situ) | Forestry residues | 18 | 27c | [56] | 18 | – |  |
HTL (ex situ) | Forestry residues | 21 | – |  | 21 | – |  |
Pyrolysis (in situ) | Forestry residues | 22 | 34c | [56] | 22 | – |  |
Pyrolysis (ex situ) | Forestry residues | 41 | – |  | 37 | – |  |
ATJ | Corn | 54 | – |  | 71 | – |  |
 | Corn stover | 35 | – |  | 22 | – |  |
 | Sugarcane | 31 | – |  | 31 | −27d | [26] |
DSHC (increased blend level) | Sugarcane | 76 | – |  | 79 | 55 to 100 | [27] |
DSHC (10% blend) | Sugarcane | 47 | – |  | 49 | – |  |