Optical Analysis System Based on Binary Differential Absorption Intensity Reconstruction Combined with Discretization Variability Analysis: Parallel Temperature and Concentration Detection of NH3, NO Mixtures DOI
Mu Li,

Fei Xie,

Jie Gao

и другие.

Analytical Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Апрель 29, 2025

In industrial combustion, parallel measurements of ammonia (NH3), nitric oxide (NO), and temperature are essential for analyzing regulating the selective catalytic reduction (SCR) process. Although ultraviolet differential optical absorption spectroscopy (UV-DOAS) is regarded as an ideal measurement method, simultaneous detection NH3, NO, has not been achieved due to analytical complexities arising from spectral overlap. Therefore, analysis system proposed based on binary intensity reconstruction combined with discretization variability analysis. First, considering complexity mixed spectra NH3 we establish a mapping transformation wavelength domain reconstructed domain, using NO standard spectra, respectively. With known mutual interference between features two compounds separated in by constructing specific Boolean screening matrices. Second, law temperature-induced clarified, relationship established within domain. Finally, construct three-dimensional field maps temperature, concentration, parameter (ROP) measure simultaneously. The results indicate that shows good accuracy, Mean Relative Errors (MRE) 3.9%, 3.5%, 2.8% (0-50.0 ppm), (290.15-773.15 K), To best our knowledge, study first report UV-DOAS.

Язык: Английский

Optical Analysis System Based on Binary Differential Absorption Intensity Reconstruction Combined with Discretization Variability Analysis: Parallel Temperature and Concentration Detection of NH3, NO Mixtures DOI
Mu Li,

Fei Xie,

Jie Gao

и другие.

Analytical Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Апрель 29, 2025

In industrial combustion, parallel measurements of ammonia (NH3), nitric oxide (NO), and temperature are essential for analyzing regulating the selective catalytic reduction (SCR) process. Although ultraviolet differential optical absorption spectroscopy (UV-DOAS) is regarded as an ideal measurement method, simultaneous detection NH3, NO, has not been achieved due to analytical complexities arising from spectral overlap. Therefore, analysis system proposed based on binary intensity reconstruction combined with discretization variability analysis. First, considering complexity mixed spectra NH3 we establish a mapping transformation wavelength domain reconstructed domain, using NO standard spectra, respectively. With known mutual interference between features two compounds separated in by constructing specific Boolean screening matrices. Second, law temperature-induced clarified, relationship established within domain. Finally, construct three-dimensional field maps temperature, concentration, parameter (ROP) measure simultaneously. The results indicate that shows good accuracy, Mean Relative Errors (MRE) 3.9%, 3.5%, 2.8% (0-50.0 ppm), (290.15-773.15 K), To best our knowledge, study first report UV-DOAS.

Язык: Английский

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