How FTIR worksFTIR spectrometer

Electronics / µC

external computer data storage

results

moduledinfrared spectrum

meas. signal

continuousinfrared spectrum

transmittedinfrared light

CALCMET™software

Fourier analysis

infrared source

cuvette

measuring value displays

absorptionspectrum

detector

interferometer

sample cell

externaleductor

Samplecell

interferometer

detector

measuring ...

How FTIR works

digital library

ref. values

FFT

+

measuring valuesm1, m2, m3, ...x

transmission spectrum standardized spectruminterferogramm

absorbance spectrum

identical spectrum f1

f2

f3

factors

reference spectra

zero gas measured background spectrum

GASMET CEMS APPLICATIONS

Gasmet CEMS and reference measurements:

SO2 measurementBFB boiler: wood, peat, bark, sludge

150.0

200.0

250.0

300.0

350.0

400.0

17:2

6

17:5

8

18:3

0

19:0

2

19:3

4

20:0

6

20:3

8

21:1

0

21:4

2

22:1

4

22:4

6

23:1

8

23:5

0

0:22

0:54

1:26

1:58

2:30

3:02

3:34

4:06

4:38

5:10

5:42

6:14

6:46

7:18

Time

Co

nce

ntr

atio

n (

mg

/Nm

3)

UV-fluorescence

FT-IR

GASMET CEMS APPLICATIONS

NOx measurementBFB boiler: wood, peat, bark, sludge

200.0

250.0

300.0

350.0

400.0

450.0

7:5

1

8:1

5

8:2

8

8:4

1

8:5

4

9:0

7

9:2

0

9:3

3

9:4

6

9:5

9

10

:12

10

:25

10

:38

10

:51

11

:04

11

:17

11

:30

11

:43

11

:56

12

:09

12

:22

12

:35

12

:48

Time

Co

nc

en

tra

tio

n

(mg

NO

2/N

m3

)

Chemiluminescence

FT-IR

0.00

5.00

10.00

15.00

20.00

25.00

0 10 20 30 40 50 60 70

Unit Run Sequence

PPM

NO

x

CEM NOx FTIR NOx

CEM NOx

FTIR NOx

FTIR Dev

Average 9.38 9.25 -0.29 Min 1.70 1.19 -9.45 Max 24.87 35.65 10.78 Std Dev 5.21 5.89 3.61 CI 0.82

Austin Energy Sandhill Unit #1 Demonstration Results

GASMET CEMS APPLICATIONS

Gasmet CEMS and reference measurements:

CO measurementBFB boiler: wood, peat, bark, sludge

0.0

500.0

1000.0

1500.0

2000.0

2500.0

3000.0

7:5

1

8:1

3

8:2

4

8:3

5

8:4

6

8:5

7

9:0

8

9:1

9

9:3

0

9:4

1

9:5

2

10

:03

10

:14

10

:25

10

:36

10

:47

10

:58

11

:09

11

:23

11

:34

11

:45

11

:56

12

:07

12

:18

12

:29

12

:40

12

:51

Time

Co

nc

en

tra

tio

n (

mg

/Nm

3)

NDIRFT-IR