1. CHROMATOGRAPHY
PAVITHRA
AP/EIE
SNSCT
POWER PLANT INSTRUMENTATION

2. INTRODUCTION
Used to measure amount of individual gases in a power plant.
Repetitive sampling procedure.
Gas chromatography.
Stationary phase and moving phase
Samples concentration recorded as chromatogram.
POWER PLANT INSTRUMENTATION

3. CONSTRUCTION Gas supply unit Thermal conductivity cell Sample injector
Drier
Chromatographic column
Exhaust
POWER PLANT INSTRUMENTATION

4. WORKING CONSTANT VOLUME SAMPLE GAS INJECTED WITH CARIER GAS – HELIUM
2 COLUMNS
1ST COLUMN- 30 INCH
2ND COLUMN – 6 FT 60 INCH
PACKED WITH 30% HEXAMETHYL PHOSPHORAMIDE.
ACTIVATED WITH MOLECULAR SIEVE 13%
HELIUM PASSES THROUGH 2 THERMISTORS
POWER PLANT INSTRUMENTATION

5. WORKING SAMPLE ADDED FLOWS THROUGH COLUMN 1 THEN THROUGH THERMISTOR 3
THEN COLUMN 2
LASTLY THROUGH THERMISTOR 4
4 THERMISTOR – 4 ARMS OF BRIDGE
READING RECORDED ON CHART
TIME TAKEN TO PASS THROUHG COLUMN IS THE MEASURE OF CONCENTRATION
POWER PLANT INSTRUMENTATION

6. WORKING PEAK IN CHRAMATOGRAM IS EACH SEPERATED COMPONENT
AREA OF GRAPH = CONCENTRATION
CHART = 10 INCH
ACCURACH = 0.2 %
POWER PLANT INSTRUMENTATION

7. Chromatographic Apparatus
POWER PLANT INSTRUMENTATION

8. CHROMATOGRAM
POWER PLANT INSTRUMENTATION

9. THANK YOU
POWER PLANT INSTRUMENTATION