Table 8. Mass and Energy Balances of Methanol Synthesis and Literature Data.
| present study MOH full capacity | present study MOH half capacity | Pérez-Fortes et al. (2016)57 | Kiss et al. (2016)36 | |
|---|---|---|---|---|
| reactor model approach | equilibrium | equilibrium | kinetics | kinetics |
| temperature [°C] | 220 | 220 | 210 | 250 |
| pressure [bar] | 31 | 31 | 76.4 | 50 |
| operation | adiabatic | adiabatic | adiabatic | isothermal |
| Mass Balance (t/t MeOH) | ||||
| inputs | ||||
| CO2 | 1.43 | 1.40 | 1.46 | 1.38 |
| H2 | 0.20 | 0.20 | 0.20 | 0.19 |
| impurities | 0.09 | 0.14 | 0.00 | 0.00 |
| total | 1.71 | 1.74 | 1.66 | 1.57 |
| outputs | ||||
| methanol | 1.00 | 1.00 | 1.00 | 1.00 |
| H2O | 0.58 | 0.58 | 0.57 | 0.59 |
| vented gases | 0.14 | 0.16 | 0.09 | 0.00 |
| total | 1.71 | 1.74 | 1.66 | 1.59 |
| Energy Balance (MWh/t MeOH) | ||||
| electricity | 0.19 | 0.22 | 0.17 | 0.55 |
| hot utility | 0.39 | 0.47 | 0.44 | 0.61 |
| cold utility | 1.73 | 1.80 | 0.86 | 1.79 |
| CO2 conversion per pass [%] | 15.03 | 14.23 | 21.97 | 21.50 |
| overall CO2 conversion [%] | 95.94 | 95.82 | 93.85 | not reported |
| MeOH purity [mol %] | 99.00 | 99.00 | 99.96 | 99.98 |