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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
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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
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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
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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
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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
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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