Table 5. PEI of Biorefinery Products.
| products | Ak (PEI/kg) | products | Ak (PEI/kg) |
|---|---|---|---|
| ethanol | 0.51 | furfural | 5.80 |
| butanol | 1.37 | carbon dioxide | 0.0003 |
| succinic acid | 0.17 | hydrogen | 0.00 |
| acetic acid | 0.34 | bio-oil | 0.84 |
| formic acid | 0.39 | biogas | 0.01 |
| levulinic acid | 0.20 |