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Table 7 Steam demand and lignin energy available for electricity production

From: Impact of pretreatment and downstream processing technologies on economics and energy in cellulosic ethanol production

Pretreatment Process Steam demand (kJ/L EtOH) Steam demand (kJ/kJ biomass)a Lignin Energy (kJ/L EtOH) Lignin Energy (kJ/kJ biomass)a Excess Lignin Energy (kJ/L EtOH) Electricity Produced (kWh/L EtOH)b
Dilute Acid 19010 0.369 28232 0.548 9223 0.77
Dilute Alkali 18737 0.363 27967 0.542 9229 0.77
Hot Water 19333 0.374 29138 0.563 9804 0.82
Steam Explosion 13508 0.235 34819 0.607 21310 1.78
  1. aBiomass heating value: 13.21 MJ/kg (Lower heating value)
  2. bAssuming 30% efficiency of lignin energy to electricity conversion