Table 4 Overall mass and energy balance of the studied biorefinery scenarios
From: Multi-product biorefineries from lignocelluloses: a pathway to revitalisation of the sugar industry?
Unit | Scenario 1 | Scenario 2 | Scenario 3 | Scenario 4 | Scenario 5 | Scenario 6 | |
|---|---|---|---|---|---|---|---|
EtOH | EtOH-LA | EtOH-Fur. | Butanol | Methanol | FT syncrude | ||
Feedstock | |||||||
Bypass to boiler | t/h | 22.75 | 26.00 | 32.50 | 26.00 | 22.75 | 19.50 |
% | 35.00 | 40.00 | 50.00 | 40.00 | 35.00 | 30.00 | |
To biorefinery | t/h | 42.25 | 39.00 | 32.25 | 39.00 | 42.25 | 45.50 |
Products | |||||||
Ethanol | t/h | 11.00 | 7.48 | 5.66 | 0.35 | – | – |
Lactic acid | t/h | – | 4.65 | – | – | – | – |
Furfural | t/h | – | – | 2.07 | – | – | – |
Butanol | t/h | – | – | – | 4.61 | – | – |
Methanol | t/h | – | – | – | – | 12.76 | – |
Syncrude | t/h | – | – | – | – | – | 5.80e |
Acetone | t/h | – | – | – | 1.50 | – | – |
Acetic acid | t/h | – | – | 1.25 | – | – | – |
Surplus elc. | MW | 7.10 | 5.60 | 7.50 | 4.30 | 0.50 | 1.80 |
Total productiona | t/h | 11.00 | 12.13 | 9.22c | 6.46 | 12.76 | 5.80 |
t/td | 0.26 | 0.31 | 0.29 | 0.16 | 0.30 | 0.13 | |
Energy demandb | |||||||
Cooling | MW | 50.70 | 45.50 | 52.00 | 73.10 | 26.20 | 33.90 |
Heating | MW | 69.10 | 66.60 | 66.30 | 61.70 | 2.60 | 2.40 |
Power | MW | 2.00 | 2.00 | 2.30 | 13.70 | 14.20 | 13.70 |