How FTIR works FTIR spectrometer Electronics / µC external computer data storage results moduled...
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Transcript of How FTIR works FTIR spectrometer Electronics / µC external computer data storage results moduled...
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