Difference between online Gas Chromatography(GC) and Tunable Filter Spectroscopy(TFS)
In this topic we will discuss about few
difference between online Gas Chromatography(GC) and Tunable Filter
Spectroscopy(TFS). Online GC will always be a precious gem in analytical field,
though we cannot compare GC and TFS because typically GC is widely used in numerous
applications and able to measure several components. Gas Chromatography
Commonly used in many LAB analyses also but we will not discuss that in topic.
Here we will review few difference between
GC and TFS which I came to notice, and this difference table is as per my perspective. If any points are
misleading or inappropriate, kindly let me know to correct those points.
|
S no |
Online Gas Chromatography (GC) |
Tunable Filter Spectroscopy (TFS) |
|
1 |
Some
of pioneer in online GC manufacturing: Siemens,
ABB, Rosemount and yokogawa |
Some
of foremost in TFS analyzer manufacturing: MKS
Instruments, Servomex and Envent |
|
2 |
Extremely
significant analyzer in operation for decades. |
New
operation principle introduced few years back |
|
3 |
GC has
separate detectors for measuring components. Most
common detectors are •
Thermal
conductivity detector (TCD) •
Flame
ionization detector (FID) •
Flame
photometry detector (FPD) •
Helium
ionization detector (HID) •
Photo
ionization detector (PID) •
Electron
capture detector (ECD) and few
more detectors are used depending upon composition of sample as required. |
single-element
photo-detector is the detector, used for measuring ppm to percent level
concentration monitoring of multiple gas compounds. |
|
4 |
Gas
chromatography can be used to separate and quantify
the components of almost all homogenous gaseous or liquid mixtures. It must
be possible to vaporize the liquid components without
decomposition GC can
able to measure many components by its separation method and it has wide
range of detectors. |
TFS is
limited in measuring components like From
C1 to C6+ H2S CO2 High
Heating Value (HHV) Low
Heating Value (LHV) Specific
Gravity Wobbe
Index (WI) |
|
5 |
The
gas chromatograph can be used for monitoring and quality control in the
following industries and applications. ·
Chemical
industry ·
Oil
& gas ·
Water/waste
water ·
Power
engineering ·
Automotive
industry ·
Iron
and steel ·
Air
plant ·
Environmental
monitoring ·
Pharmaceuticals
|
Limited covering area of
application like: ·
Hydrocarbon
gas composition monitoring ·
Petrochemical
process monitoring ·
Specialty
and chemical gas process and blending monitoring ·
Catalysis
and combustion process monitoring ·
Heating
value & Wobbe measurement ·
Power
generation (turbine, IC engine, fuel cell) ·
Alternative
fuels (biogas, syngas) |
|
6 |
Response
time is very high might take several minutes for analysis |
Analysis
in seconds Real-time
and continuous measurement |
|
7 |
Consume
yearly lot Carrier gas and combustion gas for FID/FPD |
No
need gas cylinder for carrier or combustion purpose |
|
8 |
Calibration
and validation required experienced knowledge and takes several minutes for
calibration |
Calibration
and validation is stress-free. Nitrogen
is use for zero calibration and Intended
standard gas cylinder is span calibration or validation |
|
9 |
Maintenance
of Gas Chromatography is quiet complicated as GC has many serviceable parts
like as injection valve, column, detectors, Printed circuit board and more. |
Maintenance
of TFS analyzer is easy as it does not have many serviceable parts. TFS has limited
serviceable parts like lamp source , chopper motor , pressure , temperature
sensor , Printed circuit board and
more. |
|
10 |
Highly
reliable analyzer can able to measure trace even parts-per-billion levels (PPB)
to percentage (depends on the detector
) |
Can
able to measure high range only |
|
11 |
Few GC
required daily attention |
Daily
attention is not much required |
|
12 |
EXTERNAL
DIMENSIONS of most of the GC are sizeable |
EXTERNAL
DIMENSIONS of most of the TFS Analyzer are compact |
Reference and image source
Comments
Post a Comment