Table 3 Summary of pretreatment and enzymatic saccharification conditions and results
From: Bioethanol from poplar: a commercially viable alternative to fossil fuel in the European Union
Process scenario | Liquid hot water (LHW) | Dilute acid (DA) | EnergyPoplar scenario (prospective) |
|---|---|---|---|
Pretreatment conditions | 200°C for 10 minutes | 190°C for 1.1 minutes, 2.0% H2SO4 | NA |
Pretreatment reactions | Fraction of reactant converted to product | Â | NA |
Glucan + H2O → Glucose | 2% | 24% | NA |
Glucan → Glucose oligomers + H2O | 2% | NA | NA |
Xylan + H2O → Xylose | 4% | 62% | NA |
Xylan → Xylose oligomers + H2O | 54% | NA | NA |
Arabinan + H2O → Arabinose | NAa | NA | NA |
Mannan + H2O → Mannose | NA | NA | NA |
Galactan + H2O → Galactose | NA | NA | NA |
Lignin → Soluble lignin | 25% | NA | NA |
Enzymatic saccharification conditionsb | (15 FPU cellulase + 40 CBU β-glucosidase)/g glucan in original biomass for 72 hours | (15 FPU cellulase)/g glucan in original biomass for 72 hours | (10 FPU cellulase)/g glucan in original biomass for 72 hours |
Enzymatic saccharification yields | 55.0% glucose yield, 89.8% xylose yield | 82.5% glucose yield, 24.7% xylose yield | 80.0% glucose yield, 80.0% xylose yield |
References | [9] | [23] |