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Table 3 Comparison of heating demand, cooling demand, and integrated heat for the different process configurations

From: Simulation of the downstream processing in the ethanol production from lignocellulosic biomass with ASPEN Plus® and IPSEpro

  Unit Five-stage evaporation Biogas production
Two-column distillation Three-column distillation Two-column distillation Three-column distillation
Heating demand MW 64.0 60.3 38.3 35.2
Cooling demand MW 64.8 59.1 39.9 33.7
Heat integration MW 91.9 125.9 69.5 103.4
Pinch point °C 116.4 116.6 116.4 142.9
Minimum energy consumption per kilogram of ethanol MJ/kgEtOH 18.4 17.2 11.1 10
Process configuration   A B C D