Dr. KnowEstimated Optimum Conditions for Packed Columns
| Mesh Size | Optimum Average Linear Velocity [cm/s] | Optimum Flow [mL/min] | ||||||
|---|---|---|---|---|---|---|---|---|
| Helium | Hydrogen | Nitrogen | Argon | Helium | Hydrogen | Nitrogen | Argon | |
| 60 - 80 | 5 - 8 | 6 - 10 | 3 - 5 | 3 - 4 | 4 - 6 | 4 - 7 | 2 - 4 | 2 - 3 |
| 80 - 100 | 7 - 12 | 8 - 14 | 5 - 7 | 3 - 5 | 5 - 8 | 6 - 9 | 3 - 4 | 2 - 4 |
| 100 - 120 | 8 - 14 | 10 - 17 | 5 - 9 | 4 - 6 | 5 - 9 | 7 -11 | 4 - 6 | 3 - 4 |
All values ± 20 %.
Recommended Flows for Packed Columns
| Internal Diameter | Helium | Hydrogen | Nitrogen | Argon |
|---|---|---|---|---|
| 2 mm | 20 mL/min | 15 mL/min | ||
| 3 mm | 25 mL/min | 20 mL/min | ||
| 4 mm | 30 mL/min | 25 mL/min | ||