Determining biogenic content of biogas by measuring stable isotopologues 12CH4, 13CH4, and CH3D with a mid-infrared direct absorption laser spectrometer

Teemu Kääriäinen, Craig A. Richmond, Albert Manninen

Research output: Contribution to journalArticleScientificpeer-review

Abstract

A tunable laser absorption spectrometer (TLAS) was developed for the simultaneous measurement of δ 13C and δD values of methane (CH₄). A mid-infrared interband cascade laser (ICL) emitting around 3.27 µm was used to measure the absorption of the three most abundant isotopologues in CH₄ with a single, mode-hop free current sweep. The instrument was validated against methane samples of fossil and biogenic origin with known isotopic composition. Three blended mixtures with varied biogenic content were prepared volumetrically, and their δ 13C and δD values were determined. Analysis demonstrated that, provided the isotopic composition of the source materials was known, the δ 13C and δD values alone were sufficient to determine the biogenic content of the blended samples to within 1.5%.

Original languageEnglish
Article number496
JournalSensors
Volume18
Issue number2
DOIs
Publication statusPublished - 7 Feb 2018
MoE publication typeA1 Journal article-refereed

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laser spectrometers
Biofuels
Biogas
Methane
Spectrometers
Lasers
methane
methylidyne
Infrared radiation
Humulus
Laser tuning
fossils
tunable lasers
Chemical analysis
cascades
spectrometers
lasers

Keywords

  • Biogas
  • Biogenic determination
  • Bioprocess monitoring
  • Direct absorption
  • Laser-based sensors
  • Stable isotopologues

Cite this

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title = "Determining biogenic content of biogas by measuring stable isotopologues 12CH4, 13CH4, and CH3D with a mid-infrared direct absorption laser spectrometer",
abstract = "A tunable laser absorption spectrometer (TLAS) was developed for the simultaneous measurement of δ 13C and δD values of methane (CH₄). A mid-infrared interband cascade laser (ICL) emitting around 3.27 µm was used to measure the absorption of the three most abundant isotopologues in CH₄ with a single, mode-hop free current sweep. The instrument was validated against methane samples of fossil and biogenic origin with known isotopic composition. Three blended mixtures with varied biogenic content were prepared volumetrically, and their δ 13C and δD values were determined. Analysis demonstrated that, provided the isotopic composition of the source materials was known, the δ 13C and δD values alone were sufficient to determine the biogenic content of the blended samples to within 1.5{\%}.",
keywords = "Biogas, Biogenic determination, Bioprocess monitoring, Direct absorption, Laser-based sensors, Stable isotopologues",
author = "Teemu K{\"a}{\"a}ri{\"a}inen and Richmond, {Craig A.} and Albert Manninen",
year = "2018",
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Determining biogenic content of biogas by measuring stable isotopologues 12CH4, 13CH4, and CH3D with a mid-infrared direct absorption laser spectrometer. / Kääriäinen, Teemu; Richmond, Craig A.; Manninen, Albert.

In: Sensors, Vol. 18, No. 2, 496, 07.02.2018.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Determining biogenic content of biogas by measuring stable isotopologues 12CH4, 13CH4, and CH3D with a mid-infrared direct absorption laser spectrometer

AU - Kääriäinen, Teemu

AU - Richmond, Craig A.

AU - Manninen, Albert

PY - 2018/2/7

Y1 - 2018/2/7

N2 - A tunable laser absorption spectrometer (TLAS) was developed for the simultaneous measurement of δ 13C and δD values of methane (CH₄). A mid-infrared interband cascade laser (ICL) emitting around 3.27 µm was used to measure the absorption of the three most abundant isotopologues in CH₄ with a single, mode-hop free current sweep. The instrument was validated against methane samples of fossil and biogenic origin with known isotopic composition. Three blended mixtures with varied biogenic content were prepared volumetrically, and their δ 13C and δD values were determined. Analysis demonstrated that, provided the isotopic composition of the source materials was known, the δ 13C and δD values alone were sufficient to determine the biogenic content of the blended samples to within 1.5%.

AB - A tunable laser absorption spectrometer (TLAS) was developed for the simultaneous measurement of δ 13C and δD values of methane (CH₄). A mid-infrared interband cascade laser (ICL) emitting around 3.27 µm was used to measure the absorption of the three most abundant isotopologues in CH₄ with a single, mode-hop free current sweep. The instrument was validated against methane samples of fossil and biogenic origin with known isotopic composition. Three blended mixtures with varied biogenic content were prepared volumetrically, and their δ 13C and δD values were determined. Analysis demonstrated that, provided the isotopic composition of the source materials was known, the δ 13C and δD values alone were sufficient to determine the biogenic content of the blended samples to within 1.5%.

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KW - Bioprocess monitoring

KW - Direct absorption

KW - Laser-based sensors

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