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Table 5 Major inputs and outputs from the biorefinery of each scenario

From: Production routes to bio-acetic acid: life cycle assessment

Input EAX OC EAX LE ADX OC ADX LE
Feedstock (bone dry) (t) 1.9 1.9 1.9 1.9
Enzymes (kg) 16 16 16 16
Sulfuric Acid (kg) 34 34 34 34
Ammonia (kg) 23 23 23 23
Sodium hydroxide (kg) 45 45 45 45
Clarifier polymer (kg) 1.1 1.1 1.1 1.1
Fermentation nutrients (kg) 50 50 50 50
Lime (kg) 26 0 26 0
Natural gas (GJ) 53 58 19 28
Ethyl acetate (kg) 5.2 5.2 NA NA
Alamine (kg) NA NA 1.9 1.9
Diisobutyl ketone (DIBK) (kg) NA NA 1.9 1.9
Electricity (kwh) 0 320 0 300
Output
Acetic acid (t) 1 1 1 1
Lignin (bone dry) (kg) 0 440 0 440
Electricity (kwh) 2600 0 860 0
CO2 (from lignin) (t) 1.8 0 1.8 0
CO2 (from natural gas) (t) 2.7 3.2 0.99 1.4
  1. Basis is 1 metric ton of acetic acid
  2. Extractants for each pathway (ethyl acetate for EAX, and alamine and diisobutyl ketone for ADX) are reported for their initial application rates per tonne of acetic acid. It is assumed that these extractants are reused at a 99% recycling rate
  3. EAX ethyl acetate extraction, ADX alamine/diisobutyl ketone extraction, OC onsite combustion of lignin, LE Lignin exported to a coal burning power plant