Highly Selective Gas Analyzer Based On Molecular Rotational Resonance Spectroscopy For So2 Monitoring In Ambient Air
Twagirayezu, Sylvestre
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https://hdl.handle.net/2142/116838
Description
Title
Highly Selective Gas Analyzer Based On Molecular Rotational Resonance Spectroscopy For So2 Monitoring In Ambient Air
Author(s)
Twagirayezu, Sylvestre
Contributor(s)
Neill, Justin L.
Jamil, Md Abrar
Issue Date
2022-06-20
Keyword(s)
Small molecules
Abstract
As part of the efforts to determine the applications of molecular rotational resonance (MRR) technique to SO$_{2}$ monitoring in ambient air, a K-band MRR analyzer has been employed to record the MRR signature of multiple synthetic air samples containing SO$_{2}$ pollutant as well as that of standard SO$_{2}$ samples. The observed MRR features reveal a rich rotational pattern due to MRR’s sensitivity. The interfering matrix (i.e., air moisture), which typically challenges other conventional techniques, showed no impact on MRR signatures of SO$_{2}$. The validity of MRR for SO$_{2}$ monitoring has been examined by measuring MRR signal response of a set of standard SO$_{2}$ samples over a range of sampling pressures (5-15). The obtained linear correlations allowed the determination of recovery percentage (97-100\%) and low detection limit of better than 1mg/m$^{3}$. Work to improve this analytical procedure is underway and will be reported in this talk.
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