Table 2.
The absorption investigation on the mixture of DMC and various alcohol candidates.
| Entry | DMC/wt% | Alcohol Candidate | CO2 Absorption/mmol | Separation Efficiency of MeOH/% | |
|---|---|---|---|---|---|
| Alcohol Type | Loading (mmol) or Mole Ratio | ||||
| 1 | 22.9 | EtOH | 10 | 9.52 | 95.2 |
| 2 | 30.6 | EG | 5 | 8.92 | 89.2 |
| 3 | 26.5 | PG | 5 | 8.45 | 84.5 |
| 4 | 30.9 | Glycerol | 3.33 | 7.28 | 72.8 |
| 5 | 30.3 | MeOH and EG | 2:1 | 9.64 | 96.4 |
| 6 | 28.1 | MeOH and PG | 2:1 | 9.78 | 97.8 |
| 7 | 10 | MeOH and PG | 2:1 | 9.76 | 97.6 |
| 8 | 80 | MeOH and PG | 2:1 | 9.15 | 91.5 |
Conditions: DBN (10 mmol, 1.24 g), 10 mmol –OH group in alcohol or mixture, CO2 1.0 MPa, 20 min, 25 °C. Blank absorption was not deducted for the data; ethylene glycol (EG), 1,2-propylene glycol (PG).