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Table 3 Sensitivity analysis of primary energy balances of the ethanol production systems studied

From: Integrating enzyme fermentation in lignocellulosic ethanol production: life-cycle assessment and techno-economic analysis

MJ primary energy MJ−1 ethanol

ISO 

RED

Off-site

A

A+

B

B+

Off-site

A

A+

B

B+

Base case

2.8

2.7

2.6

2.6

2.5

2.0

2.0

1.9

1.9

1.9

Off-site enzyme activity +50%

2.7

    

2.0

    

Enzyme dosage based on [7]

2.5

    

1.9

    

Solid fuel substitutes coal

2.7

2.6

2.5

2.5

2.4

     
  1. Results for alternative data regarding purchased enzymes and substituted products