Life-cycle GHG emission estimates for corn ethanol production
at a recently built Mid west dry-grind ethanol plant that
uses natural gas to produce process heat and fossil fuel
generated electricity (from the grid) are used as the base line
[24,26,27]. Greenhouse gas emission factors for all of the inventory
items are obtained from Kaliyan et al. [23]. A few
important GHG emission factors are given below, and other
GHG emission factors can be found in Kaliyan et al. [23].