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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