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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