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Table 4 Natural gas steam reforming-based bio-jet processes—major process inputs and outputs referenced to 1 MJ of NGSR and NGSR-HF bio-jet fuels

From: Hydrocarbon bio-jet fuel from bioconversion of poplar biomass: life cycle assessment

  NGSR bio-jet NGSR-HF bio-jet Unit
Input
 Feedstock (bone dry) 81.4 81.4 g
 Enzymes 0.683 0.683 g
 Sulfuric acid 1.46 1.46 g
 Lime 2.43 2.43 g
 Calcium carbonate 0.391 0.391 g
 Carbon dioxide 0.172 0.172 g
 Ammonia 1.03 1.03 g
 Corn steep liquor 2.18 2.18 g
 Sodium hydroxide 1.94 1.94 g
 Natural gas—steam reforming 0.0525 0.0525 MJ
 Natural gas—heat/steam 0.0937 0 MJ
 Hog fuel—heat/steam 0 8.23 g
Output
 Bio-jet fuel 1 1 MJ
 Excess electricity 0.00254 0.00254 Kwh
 CO2 (biogenic) 87.5 102 g
CO2 (nonbiogenic) 32.6 27.9 g