Membrane Based Triethylene Glycol Separation and Recovery from ...

Process of preparation
1. Sample dilution in the solvent Methanol when received the sample need to assess
the probability that the concentration of TEG in the calibration curve or not (0.1-
2%). Used the concentration 10% of TEG and then have to sample dilution 10 times
before injection by pipette the volume of sample 100 µL into vial that has size 1.5
mL and then adding more methanol 900 µL. After that analytical by gas
chromatograph (GC).
2. TEG sample to be analyzed must be stored in the refrigerator at 4 °C before
analyzed and should be left at room temperature for about one hour.
3. Appropriate sample volume for analysis should have a minimum volume of 3 ml.
Process of preparing a standard solution to Calibration curve
1. Preparation of standard solution concentration 10% TEG stock solution.
2. Diluted standard solution from the number 1 of process of preparation by various
concentrations from 0.1, 0.25, 0.5, 1.0 and 2.0%, respectively.
3. Triethylene Glycol compounds analyzed with GC Agilent HP 6890.
State of a GC Agilent HP 6890 for analysis of compounds triethylene glycol.
1. Detector 250°C
- Air and adjusting the pressure to 400 psi.
- H2 gas and adjusting the pressure to 40 psi.
- N2 gas and adjusting the pressure to 20 psi.
2. Temperature program
Parameter
Temperature
(°C)
Hold
(min)
Runtime
(h)
Initial 100 2 3
Ramp. 1, (25 °C/min) 250 10 18
3. Column : Restex Rxi 624 sil MS 30m x 0.25m x 1.4m
Mode: Constant Pressure
Flow: 1.2 ml/min
Outlet: Ambient
Average: 25 cm/sec time 18 min
4. Inlet
Inlet: Back
Mode: Splitless
Heater: 250 °C, 7.78 psi, flow 24.1 ml/min
Split vent: 19.9 ml/min at 0.1 ml
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