Skip to main content

Table 1 WTWa GHG emissions of STJs and ATJs from previous studies (numbers in the parenthesis indicates estimated ranges)

From: Well-to-wake analysis of ethanol-to-jet and sugar-to-jet pathways

References

Feedstock

Co-products

Co-product handling methods

WTWa GHG emissions (g CO2e/MJ)

Note

Cox et al. [25]

Sugarcane

Sugar, electricity, steam

Displacement

80

Including indirect impact from increased sorghum production

Market value allocation

22

Moreira et al. [26]

Sugarcane

Electricity, yeaste

Displacement

8.5

With LUC emissionsa (12 g CO2e/MJ)

Staples et al. [27]

Sugarcane

Electricity

Displacement

−4.9 (−27 to 2.1)

Without LUCb

   

Market value allocation

12.7 (6.8 to 19.7)

 
 

Corn

Distiller dry grains with solubles

Displacement

65.6 (50.1 to 117.4)

Without LUCc

   

Market value allocation

62.6 (47.6–117.5)

 
 

Switchgrass

Electricity

Displacement

37.4 (11.7 to 89.8)

Without LUCd

   

Market value allocation

37.4 (17.3 to 89.8)

 

Budsberg et al. [28]

Poplar

Electricity

Displacement

60 to 66

Without LUC; H2 from NG SMR

   

Displacement

32 to 73

Without LUC; H2 from biomass gasification

  1. aLUC GHG was estimated at 12 g CO2e/MJ
  2. bLUC GHG was estimated at 20–47 g CO2e/MJ
  3. cLUC GHG was estimated at 38–101 g CO2e/MJ
  4. dLUC GHG was estimated at 1–12 g CO2e/MJ
  5. eThe jet production process used in Moreira et al. [26] recovers and export yeast as a co-product