Table 3. Efficiency of Desorption of Toluene from CyNMe2 Using CO2 and Water under Different Conditionsa.
| parameters | desorption of toluene (%) | bubbling time (min) | CO2 consumption (mL) |
|---|---|---|---|
| CO2 Flow Rate (mL/min) | |||
| 45 | 97.7 | 50 | 2250 |
| 30 | 93.7 | 60 | 1800 |
| 15 | 93.0 | 115 | 1725 |
| Temperature (°C) | |||
| 20 | 92.5 | 80 | 2400 |
| 25 | 93.7 | 60 | 1800 |
| 35 | 92.9 | 70 | 2100 |
| 45 | 89.3 | 85 | 1951 |
| 55 | 73.7 | 105 | 3150 |
| Toluene Concentration (g/L) | |||
| 65 | 92.8 | 75 | 2250 |
| 130 | 93.7 | 60 | 1800 |
| 260 | 92.0 | 85 | 2550 |
| bVolume Ratio (Lmix/Lup) | |||
| 10:50 | 96.0 | 45 | 1350 |
| 10:25 | 93.7 | 50 | 1500 |
| 10:16.7 | 93.0 | 50 | 1500 |
| 10:12.5 | 93.9 | 55 | 1650 |
| 10:10 | 93.7 | 60 | 1800 |
| CO2 Purity (%) | |||
| 100 | 93.7 | 60 | 1800 |
| 90 | 91.5 | 65 | 1950 |
| 80 | 89.1 | 70 | 2100 |
| 50 | 80.3 | 80 | 2400 |
| 10 | 65.7 | 150 | 4500 |
| 5 | 53.2 | 195 | 5850 |
| 1 | 48.2 | 210 | 6300 |
a
Unless otherwise stated, CO2 (100% purity, 30 mL/min) was bubbled into the mixtures of water (10 mL) and 10 mL of standard solution containing CyNMe2 and toluene (130 g/L) at 25 °C.
b
Lmix/Lup represents the volume ratio of mixed standard solution to pure water.