Table 1
Evaluation of the energy consumption required for the desolventization of 100 kg of rapeseed meal.
| Solvent in 100 kg of marc (kg) | Solvent for 100 kg of meal (kg) | Enthalpy of vaporisation of the solvent (kJ/100 kg) | Enthalpy of the steam in vapours (kJ/100 kg) | Sensible heat (kJ/100 kg) | Total heat (kJ/100 kg) | Total energy variation vs. hexane | Mass water condensed kg/100 kg | Water content of the meal | |
|---|---|---|---|---|---|---|---|---|---|
| n-Hexane | 22.1 | 28.3 | 9 421 | 4 004 | 9 389 | 22 815 | 0% | 4.62 | 15.9% |
| iso-Hexane | 22.1 | 28.3 | 9 138 | 4 004 | 9 573 | 22 716 | 0% | 4.59 | 15.9% |
| cyclo-Hexane | 22.2 | 28.6 | 10 298 | 6 659 | 7 805 | 24 763 | 9% | 4.44 | 15.7% |
| Methanol | 43.2 | 76.0 | 150 323 | 4 835 | 9 631 | 164 788 | 622% | 39.26 | 36.8% |
| Ethanol | 40.4 | 67.9 | 57 859 | 10 307 | 7 252 | 75 418 | 231% | 15.98 | 24.1% |
| Propan-2ol | 37.6 | 60.3 | 40 131 | 21 218 | 6 826 | 68 176 | 199% | 11.53 | 21.1% |
| Acetone | 28.7 | 40.2 | 20 920 | 5 200 | 10 390 | 36 510 | 60% | 7.69 | 18.3% |
| MEK | 26.9 | 36.8 | 16 292 | 14 556 | 6 887 | 37 735 | 65% | 5.69 | 16.7% |
| Ethyl acetate | 28.9 | 40.6 | 17 464 | 9 400 | 8 008 | 34 873 | 53% | 6.25 | 17.2% |
| DCM | 28.8 | 40.4 | 13 297 | 2 336 | 13 322 | 28 955 | 27% | 6.53 | 17.4% |
| 2-MeOx (1) | 26.1 | 35.4 | 12 875 | 10 257 | 7 672 | 30 804 | 35% | 5.04 | 16.2% |
| 2-MeOx (2) | 42.0 | 72.4 | 26 359 | 31 813 | 8 145 | 66 317 | 191% | 8.47 | 18.9% |
(1) Solvent hold-up according to our assessment. (2) solvent hold-up according to Bartier et al. (2024).
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