Page 34 - Shimadzu Journal vol.8 Issue2

O2, N2, CO, CH4, CO2 and H2S (High Concentrations) are meas- By adding SCD to routine Refinery Gas Analyzer, complete com-
ured with TCD-1 detector with Helium carrier gas. Hydrogen is position of the sample can be analyzed thus saving time for analyz-
analyzed on TCD-2 with Nitrogen carrier gas. C1 to C5 Paraffins ing in different systems and thereby increasing productivity.
and Olefins with C6+ or C7+ backflushed, are analyzed with FID
detector. Typically trace sulfur components like H2S, COS, Methyl Shimadzu Middle East & Africa (SMEA) has been building system
Mercaptan, Ethyl Mercaptan are analyzed with SCD detector. GCs since 2012 and until now has produced more than 350 system
GCs. The system GC team has been developing various new appli-
Typical concentration range for analysis of sample components is cations and analyzers such as Capillary TOGA, Trace Oxygenates
as below. (LOWOX), Simdist, DHA, Trace CO–CO2, LPG analyzer, Trace
Gases with PDHID etc. in addition to accessories such as vaporiz-
Components Low High Detector ers and stream selectors. They have improved overall design of the
system so that the space on GC can be optimized and utilized for
O2, N2, CO, CO2 0.01% 100% TCD‑1
some complex applications like RGA–SCD and Extended RGA/
H2S 0.02% 100% TCD‑1
NGA with 4 Channels.
H2 0.01% 100% TCD‑2
SMEA provides sales and service trainings to its partners and has
Hydrocarbons C1‑C6+ 0.001% 100% FID
been providing support for system GC to all customers. It also has
Sulfurs 0.01ppm 100ppm SCD
the facility to conduct Factory Acceptance Test (FAT).

The total analysis time is between 10–15 minutes, depending upon Top image: System GC Team, Shimadzu Middle East & Africa FZE
number of sulfur components.

Fig. 1. SCD Chromatogram – 5ppm Sulfur Components Fig. 2. FID Chromatogram – Hydrocarbons

Fig. 3. TCD 1 Chromatogram – Permanent Gases Fig. 4. TCD 2- Chromatogram – Hydrogen

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