Corn ethanol produced with BIGCC systems resulted in
much greater reductions in life-cycle GHG emissions than
ethanol produced with NGCC system. Ethanol produced in
BIGCC systems resulted in over 100% reduction in life-cycle
GHG emissions compared to gasoline. The ethanol produced
in this way is a carbon negative biofuel. Production of
substantial amounts of renewable electricity from biomass
fuels and the replacement of base-load, coal generated
electricity was responsible for these significant GHG emission
reductions. Moreover, NGCC system resulted in significant
reduction (93.4%) in life-cycle GHG emissions for
corn ethanol compared to gasoline due to the large amount
of electricity sent to the grid.