Gas Temperature Measurement Using Differential Optical Absorption Spectroscopy (DOAS)

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Gas Temperature Measurement Using Differential Optical Absorption Spectroscopy (DOAS). / Gao, Qiang; Weng, Wubin; Li, Bo; Aldén, Marcus; Li, Zhongshan.

In: Applied Spectroscopy, Vol. 72, No. 7, 2018, p. 1014-1020.

Research output: Contribution to journalArticle

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TY - JOUR

T1 - Gas Temperature Measurement Using Differential Optical Absorption Spectroscopy (DOAS)

AU - Gao, Qiang

AU - Weng, Wubin

AU - Li, Bo

AU - Aldén, Marcus

AU - Li, Zhongshan

PY - 2018

Y1 - 2018

N2 - A nonintrusive method for flow gas temperature measurement using differential optical absorption spectroscopy (DOAS) was demonstrated. A temperature-dependent spectra (TDS) originated from the DOAS spectra of sulfur dioxide (SO2) in the wavelength range of 276–310 nm was introduced, and the relationship between the TDS and the temperature was built through experimental calibration process. This relationship is found to be independent of SO2 concentration and can be used for temperature measurements. The experimental results indicated that the precision of the TDS method is < ± 0.3% for SO2 concentrations higher than 150 ppm with the optical path length of 170 mm. For lower concentrations, the precision is estimated to be ± 0.4% at 1 ppm. The relative deviation between the temperature measured by the TDS method and that measured by a thermocouple is within 3% in the temperature range of 298–750 K, and the TDS method has a quicker response to the fast-changing temperature than the thermocouple.

AB - A nonintrusive method for flow gas temperature measurement using differential optical absorption spectroscopy (DOAS) was demonstrated. A temperature-dependent spectra (TDS) originated from the DOAS spectra of sulfur dioxide (SO2) in the wavelength range of 276–310 nm was introduced, and the relationship between the TDS and the temperature was built through experimental calibration process. This relationship is found to be independent of SO2 concentration and can be used for temperature measurements. The experimental results indicated that the precision of the TDS method is < ± 0.3% for SO2 concentrations higher than 150 ppm with the optical path length of 170 mm. For lower concentrations, the precision is estimated to be ± 0.4% at 1 ppm. The relative deviation between the temperature measured by the TDS method and that measured by a thermocouple is within 3% in the temperature range of 298–750 K, and the TDS method has a quicker response to the fast-changing temperature than the thermocouple.

KW - absorption spectroscopy

KW - differential optical absorption spectroscopy

KW - DOAS

KW - Sulfur dioxide

KW - temperature measurement

UR - http://www.scopus.com/inward/record.url?scp=85049053460&partnerID=8YFLogxK

U2 - 10.1177/0003702818760864

DO - 10.1177/0003702818760864

M3 - Article

VL - 72

SP - 1014

EP - 1020

JO - Applied Spectroscopy

T2 - Applied Spectroscopy

JF - Applied Spectroscopy

SN - 1943-3530

IS - 7

ER -