Refinery Gas Fast Analysis on GsBP-PLOT Columns


Refinery gas streams vary considerably in composition.

A detailed determination of hydrocarbons C1 through C6 with reported as a composite peak is usually required in refinery gas analysis (RGA). An exact measure of stream components is essential in achieving optimum product quality control. BTEX is an acronym that stands for benzene, toluene, ethylbenzene and xylenes. These compounds are known pollutants and are typically found near petroleum production and storage sites. Their analysis is included using RGA extended method.

GC: Agilent 5890 w/ FID

Column: GsBP-FRGA, 30m x 0.53mm

Cat. No.: 98053-3000A

Oven: 70 ℃ (1min) 30 ℃ /min 145 ℃ (2min) 45 ℃ /min 200 ℃ (10min)

Carrier: Hydrogen, column pressure 5psi

Inlet: Split, 275 ℃, split ratio 10:1

Detector: FID 325 ℃

Samples: refinery gas and BTEX sample

Inject volume: 100ul

Refinery Gas Fast Analysis with GsBP-PLOT Columns 2

Peak Compound Retention Time
1 Methane 0.515
2 Ethane 0.572
3 Ethylene 0.649
4 Propane 0.813
5 Cyclopropane 1.299
6 Propylene 1.355
7 i-Butane 1.607
8 n-Butane 1.749
9 Propadiene 1.961
10 Acetylene 2.148
11 Trans-2-butene 2.533
12 1-Butene 2.62
13 iso-Butylene 2.751
14 c-2-butene 2.85
15 iso-Pentane 3.008
16 Pentane 3.145
17 1,3-Butadiene 3.442
18 Propyne 3.718
19 Trans-2-pentene 3.852
20 1-pentene 3.911
21 2-Methyl-2-butene 4.045
22 n-Hexane 4.658
23 Benzene 6.704
24 Toluene 7.199
26 Ethylbenzene 9.175
27 m-Xylene 9.259
28 p-Xylene 12.584
29 o-Xylene 13.106

Conclusion

  1. FAST refinery gas analysis (RGA) method determines the composition of refinery gas including C5 olefins and n-C6 with a high speed solution in only five minutes on a propriety 30m Al2O3 PLOT column and 70℃ starting temperature.
  2. This analysis is extended to C8 aromatics at temperatures 200℃. The analysis of BTEX using the RGA extended method within 15 minutes is achieved.