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

    Fingerprint

    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

    @article{938966206eb544f7b0b066a2905dd432,
    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",
    month = "2",
    day = "7",
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    language = "English",
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    journal = "Sensors",
    issn = "1424-8220",
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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%.

    KW - Biogas

    KW - Biogenic determination

    KW - Bioprocess monitoring

    KW - Direct absorption

    KW - Laser-based sensors

    KW - Stable isotopologues

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    DO - 10.3390/s18020496

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