Separation Method for Cross-Aliased Near-IR Absorption Lines of C2H4: A Coal Spontaneous Combustion Marker
To tackle the cross-interference problem between CH 4 and C 2 H 4 and the aliasing interference problem of C 2 H 4 itself, on the basis of the sparse decomposition theory, multiple Lorentz function-based methods were proposed for separating the cross-aliasing interference of near-infrared (IR) C 2 H...
Saved in:
Published in | Journal of applied spectroscopy Vol. 90; no. 1; pp. 189 - 197 |
---|---|
Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
New York
Springer US
01.03.2023
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | To tackle the cross-interference problem between CH
4
and C
2
H
4
and the aliasing interference problem of C
2
H
4
itself, on the basis of the sparse decomposition theory, multiple Lorentz function-based methods were proposed for separating the cross-aliasing interference of near-infrared (IR) C
2
H
4
absorption lines. A quadruple Lorentz function-based separation model describing the absorption coefficient of C
2
H
4
is developed, with which the absorption lines of background gas and to-be-measured C
2
H
4
were separated from the absorption lines of mixed gas, thereby effectively separating the absorption line of C
2
H
4
and accurately measuring its concentration. The results show that the maximum errors of C
2
H
4
and CH
4
gasometrical analyses are 5.3 × 10
−6
/201.7 × 10
−6
and 57 × 10
−6
/5000 × 10
−6
, respectively. The proposed method effectively eliminates the errors caused by cross-aliasing interference of C
2
H
4
absorption lines in the near-IR bands and improves the detection accuracy of the TDLAS gas detection system. The findings of this study provide a feasible solution to the cross-aliasing interference problem of IR absorption lines. |
---|---|
ISSN: | 0021-9037 1573-8647 |
DOI: | 10.1007/s10812-023-01521-x |