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Table 4 Material balance of the studied conditions (feedstock: 2000 dry metric tonne/day)

From: Technoeconomic evaluation of recent process improvements in production of sugar and high-value lignin co-products via two-stage Cu-catalyzed alkaline-oxidative pretreatment

Experimental reaction conditionsa Glucose Xylose Product generation (metric tonne/day)
Total solubilized lignin Total precipitated lignin
120 °C—Cu-AHP 8% H2O2 822.1 320.1 225.1 135.2
120 °C—Cu(bpy) + O2 808.0 309.9 222.4 133.8
120 °C—Cu-AHP 8% H2O2 + O2 984.8 359.1 333.5 160.8
120 °C—Cu-AHP 6% H2O2 + O2 975.6 359.1 323.9 160.4
120 °C—Cu-AHP 4% H2O2 + O2 959.8 359.1 307.4 158.2
120 °C—Cu-AHP 2% H2O2 + O2 946.9 359.1 297.8 156.1
90 °C—Cu-AHP 8% H2O2 653.6 256.0 167.5 85.9
90 °C—Cu-AHP 4% H2O2 + O2 778.0 289.4 216.9 98.0
  1. a120 and 90 °C: alkaline pre-extraction step conducted at 120 and 90 °C, respectively. Cu-AHP H2O2: Cu-AHP pretreatment performed at 80 °C; Cu(bpy) + O2: Cu(bpy)-catalyzed alkaline-oxidative pretreatment with 50 psig O2 as the only oxidant; Cu-AHP H2O2 + O2: O2-enhanced Cu-AHP pretreatment (50 psig O2). Values are expressed as averages of triplicate experiments