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. 2021 Feb 17;6(8):5627–5641. doi: 10.1021/acsomega.0c06088

Table 1. Summary of Operating Variables for the LA Production Process.

unit operating variable Value reference
acid pretreatment temperature (°C) 190 (35)
  pressure (atm) 13 (17)
  % solids 0.42 (35)
  acid concentration (% w/w) 0.0011 (35)
  water mass flow (kg/h) 8480.36 estimated
  acid mass flow (kg/h) 100.6 estimated
  NH3 concentration (% w/w) 1.1 (17)
  NH3 mass flow rate (kg/h) 3.8 estimated
  reactions (xylan)n + nH2O → nxylose (35)
    (xylan)n → nfurfural + 2H2O  
    (glucan)m + mH2O → mglucose  
   
graphic file with name ao0c06088_m014.jpg
 
    acetate → acetic acid  
    lignin → soluble lignin  
    H2SO4 + Ca(OH)2 → CaSO4·2H2O  
enzymatic hydrolysis reactor temperature (°C) 45 (33)
  reactor pressure (atm) 1.66 (17)
  water supply in the reactor 22.90 estimated
  reactions (glucan)m + mH2O → mglucose (32)
acid-catalyzed dehydration temperature reactor 1 (°C) 210 (14)
  temperature reactor 2 (°C) 180  
  pressure reactor 1 (atm) 24.67  
  pressure reactor 2 (atm) 14.10  
  % moisture in the final reactor 28.76% estimated
  reactions glucose → 3H2O + HMF (5)
    xylose → furfural + 3H2O  
    2H2O + HMF → LA + FA  
purification equilibrium stages tower 1 10 estimated
  reflux ratio tower 1 (mass) 1.5  
  distillate rate tower 2 (kg/h) 5180  
  equilibrium stages tower 2 10  
  reflux ratio tower 2 2.5  
  distillate rate tower 2 (kg/h) 170