Measurements Of High-temperature Absorption Spectra Of Dimethyl Ether And Diethyl Ether Between 950 And 1190 Cm−1and Their Direct Pyrolysis Study In A Shock Tube

Adil, Mohammad

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https://hdl.handle.net/2142/116613 Copy

Description

Title

Measurements Of High-temperature Absorption Spectra Of Dimethyl Ether And Diethyl Ether Between 950 And 1190 Cm−1and Their Direct Pyrolysis Study In A Shock Tube

Author(s)

Adil, Mohammad

Contributor(s)

• Farooq, Aamir
• Giri, Binod

Issue Date

2022-06-23

Keyword(s)

Mini-symposium: Spectroscopy meets Chemical Dynamics

Abstract

Laser absorption spectroscopy has been proved to be a powerful diagnostic tool for high enthalpic systems like exoplanets, combustion applications and hypersonic flows. But there is a scarcity of high-temperature absorption data, especially for large molecules due to technical challenges like limited availability of optical materials necessary to withstand high temperatures. Furthermore, generating a chemically stable, homogeneous and steady gas state for a sufficient duration to carry out such high-temperature measurements is rather complicated and most experimental approaches satisfy only a few of these requirements. In this work, we present measurements of temperature-dependent absorption cross-section between 950-1190 \wn of dimethyl ether (DME) and diethyl ether (DEE) and their direct pyrolysis study. The methodology employed here consists of rapid tuning, wide range/fixed wavelength MIRcat-QT laser in conjugation with shock tube. The spectral measurements are performed between 600-900 K, at around 1.2 bar. The measured IR absorption spectra are the first experimental measurements of high-temperature spectra of these species and show strong temperature dependence. For the first time absorption cross-section correlation has been provided for a wide range of spectra over a wide range of temperatures. These measured spectra have provided a significant idea about the trend in spectra at elevated temperatures and helped in the selection of promising wavelengths for sensitive detection. DME and DEE pyrolysis studies are performed at 1121.7 \wn and 1115 \wn respectively by providing the marginal temperature dependence absorption cross-section correlations.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Handle URL

https://hdl.handle.net/2142/116613&&

DOI

https://doi.org/10.15278/isms.2022.RH10

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Copyright 2022 held by the authors

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