In-situ analysis of methane plasmas with mid-infrared supercontinuum-based Fourier-transform spectroscopy

Roderik Krebbers; Ningwu Liu; Wessel Averink; Frans J. M. Harren; Tom Butterworth; Gerard van Rooij; Amir Khodabakhsh; Simona M. Cristescu

doi:10.1007/s00340-024-08370-2

In-situ analysis of methane plasmas with mid-infrared supercontinuum-based Fourier-transform spectroscopy

Roderik Krebbers, Ningwu Liu, Wessel Averink, Frans J. M. Harren, Tom Butterworth, Gerard van Rooij, Amir Khodabakhsh^*, Simona M. Cristescu

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

The conversion of methane (CH4) into the hydrocarbons ethane (C2H6) and acetylene (C2H2) in plasma is investigated in the first in-situ study using a mid-infrared supercontinuum source and a Fourier transform spectrometer. Due to the spatial coherence of the supercontinuum source, it is possible to probe the plasma over a path length of 3.5 m and observe CH4, C2H6, and C2H2 with concentrations below percent level at a few mbar pressure. The broad spectral range of the supercontinuum source (1.4-4.1 mu m) covers entire rovibrational bands of molecules, allowing simultaneous detection of the rotational and vibrational temperature of CH4 and C2H2. The ability to study these experimental parameters in situ opens new possibilities for understanding and optimizing plasma-based chemical conversions.

Original language	English
Article number	5
Number of pages	9
Journal	Applied Physics B: Photophysics and Laser Chemistry
Volume	131
Issue number	1
DOIs	https://doi.org/10.1007/s00340-024-08370-2
Publication status	Published - 10 Dec 2024

Keywords

TEMPERATURE
ACETYLENE

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title = "In-situ analysis of methane plasmas with mid-infrared supercontinuum-based Fourier-transform spectroscopy",

abstract = "The conversion of methane (CH4) into the hydrocarbons ethane (C2H6) and acetylene (C2H2) in plasma is investigated in the first in-situ study using a mid-infrared supercontinuum source and a Fourier transform spectrometer. Due to the spatial coherence of the supercontinuum source, it is possible to probe the plasma over a path length of 3.5 m and observe CH4, C2H6, and C2H2 with concentrations below percent level at a few mbar pressure. The broad spectral range of the supercontinuum source (1.4-4.1 mu m) covers entire rovibrational bands of molecules, allowing simultaneous detection of the rotational and vibrational temperature of CH4 and C2H2. The ability to study these experimental parameters in situ opens new possibilities for understanding and optimizing plasma-based chemical conversions.",

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doi = "10.1007/s00340-024-08370-2",

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T1 - In-situ analysis of methane plasmas with mid-infrared supercontinuum-based Fourier-transform spectroscopy

AU - Krebbers, Roderik

AU - Liu, Ningwu

AU - Averink, Wessel

AU - Harren, Frans J. M.

AU - Butterworth, Tom

AU - van Rooij, Gerard

AU - Khodabakhsh, Amir

AU - Cristescu, Simona M.

PY - 2024/12/10

Y1 - 2024/12/10

N2 - The conversion of methane (CH4) into the hydrocarbons ethane (C2H6) and acetylene (C2H2) in plasma is investigated in the first in-situ study using a mid-infrared supercontinuum source and a Fourier transform spectrometer. Due to the spatial coherence of the supercontinuum source, it is possible to probe the plasma over a path length of 3.5 m and observe CH4, C2H6, and C2H2 with concentrations below percent level at a few mbar pressure. The broad spectral range of the supercontinuum source (1.4-4.1 mu m) covers entire rovibrational bands of molecules, allowing simultaneous detection of the rotational and vibrational temperature of CH4 and C2H2. The ability to study these experimental parameters in situ opens new possibilities for understanding and optimizing plasma-based chemical conversions.

AB - The conversion of methane (CH4) into the hydrocarbons ethane (C2H6) and acetylene (C2H2) in plasma is investigated in the first in-situ study using a mid-infrared supercontinuum source and a Fourier transform spectrometer. Due to the spatial coherence of the supercontinuum source, it is possible to probe the plasma over a path length of 3.5 m and observe CH4, C2H6, and C2H2 with concentrations below percent level at a few mbar pressure. The broad spectral range of the supercontinuum source (1.4-4.1 mu m) covers entire rovibrational bands of molecules, allowing simultaneous detection of the rotational and vibrational temperature of CH4 and C2H2. The ability to study these experimental parameters in situ opens new possibilities for understanding and optimizing plasma-based chemical conversions.

KW - TEMPERATURE

KW - ACETYLENE

U2 - 10.1007/s00340-024-08370-2

DO - 10.1007/s00340-024-08370-2

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SN - 0721-7269

VL - 131

JO - Applied Physics B: Photophysics and Laser Chemistry

JF - Applied Physics B: Photophysics and Laser Chemistry

IS - 1

M1 - 5

ER -

In-situ analysis of methane plasmas with mid-infrared supercontinuum-based Fourier-transform spectroscopy

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Keywords

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