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

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

Experimental reaction conditions^a	Glucose	Xylose	Product generation (metric tonne/day)
Experimental reaction conditions^a	Glucose	Xylose	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

^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

ISSN: 2731-3654