Page 18 - Shimadzu Journal vol.4 Issue1

Natural Gas Analysis

Table 1 NGA system configuration, target compounds and analysis time Table 2 Detection range of components of the Fast NGA system
Model Name GC-2014NGA1 GC-2014FNGA1 Concentration Range
No. Name of Compound Detector
ASTM-D1945 ASTM-D1945 Low Conc. High Conc.
Standard Method ASTM-D3588 ASTM-D3588 1 He 0.01% 10.0% TCD-2
GPA-2261 GPA-2261 2 H2 0.01% 10.0% TCD-2
Dual AFC Dual AFC 3 O2 0.01% 20.0% TCD-1
Flow Controller
AUX-APC AUX-APC 4 N2 0.01% 50.0% TCD-1
Valve Numbers 3 4 5 CO 0.01% 5.0% TCD-1
Column Numbers 6 8 6 CO2 0.01% 20.0% TCD-1
Type of Detector Dual TCD Dual TCD, FID 7 C2H6 0.01% 10.0% TCD-1
He, H2, O2, N2, CH4, CO, He, H2, O2, N2, CH4, CO, 8 H2S 0.10% 30.0% TCD-1
Target Compounds
CO2, C2-C5, H2S, C6 + CO2, C2-C5, H2S, C6 + 9 CH4 20.0% 100.0% TCD-1
Analysis Time 17 min 10 min 10 C3H8 0.001% 10.0% FID
11 i-C4H10 0.001% 10.0% FID
12 n-C4H10 0.001% 10.0% FID
13 i-C5H12 0.001% 2.0% FID
14 n-C5H12 0.001% 2.0% FID
15 C6 + 0.001% 0.5% FID

O 2, N 2, CH 4 and CO

(CO, CH 4) CO 2, C 2 and N 2S

H 2
+
C 6 and C 1, C 2 − C 5

He and H 2

Fig. 2 Flow diagram of the Fast NGA system

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