Spatially and temporally resolved IR-DFWM measurement of HCN released from gasification of biomass pellets

Hot, Dina; Pedersen, Rasmus L.; Weng, Wubin; Zhang, Yuhe; Aldén, Marcus; Li, Zhongshan

doi:10.1016/j.proci.2018.07.105

Cited by 13 publications

(24 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The mid-infrared laser beams are much less sensitive to scattering compared to visible and ultraviolet wavelengths, making this a viable technique for temperature measurements in sooty flames and other high-scattering environments. In addition, mid-IR DFWM is a promising candidate for quantitative concentration measurements of molecules in combustion environments, 4 and in those types of measurements this technique can be applied with the same setup without needing any extra complex instrumentation, apart from some type of calibration measurement.…”

Section: Discussionmentioning

confidence: 99%

“…Finally, we wished to investigate how the on-line approach to WALTHER used in Hot et al. 4 perform compared to measuring the line group strength by excitation scans.…”

Section: Introductionmentioning

confidence: 99%

“…The work in our laboratory has been focused on the use of infrared polarization spectroscopy (IRPS) and infrared degenerate four wave mixing (DFWM) for combustion diagnostics of molecular species which otherwise lack available absorption lines in the visible/ultraviolet spectral range. This includes many hydrocarbons and toxic pollutants such as CH 4 , C 2 H 6 , HCN, HCl, HF, etc. Quantitative concentration measurements in combustion environments using DFWM and IRPS have been demonstrated using calibration in a room-temperature gas flow with known concentrations.…”

Section: Introductionmentioning

confidence: 99%

“…For these reasons, WALTHER was employed for spatially resolved HCN concentration measurements. 4 The effect of saturation was already investigated in Sun et al 2 However, a recent work has raised new questions. Firstly, we have suspected that the mid-infrared dyepumped laser system, used for IRPS and DFWM measurements, jumps between different longitudinal modes in a way that can vary from scan to scan and thus make the results less reproducible.…”

Section: Introductionmentioning

confidence: 99%

“…Secondly, the effects of saturation on the accuracy of the WALTHER method need to be quantified. Finally, we wished to investigate how the on-line approach to WALTHER used in Hot et al 4 perform compared to measuring the line group strength by excitation scans.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Saturation Dependence of Flame Thermometry Using Mid-IR Degenerate Four Wave Mixing

et al. 2020

Self Cite

View full text Add to dashboard Cite

It has previously been demonstrated that the ratio of the degenerate four wave mixing signal from two hot water line groups near 3231 cm–1 can be used for seedless flame temperature measurements. This paper presents an investigation of the impact of saturation effects on the measured signal intensity from each line group, as well as an estimation of the accuracy of the method. The saturation effects observed here would result in a large systematic error if they are not taken into account when using the degenerate four-wave mixing intensity of these water line groups to calculate the flame temperature.

show abstract

Section: Discussionmentioning

confidence: 99%

“…Finally, we wished to investigate how the on-line approach to WALTHER used in Hot et al. 4 perform compared to measuring the line group strength by excitation scans.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations