Ultra-fast polarity switching GC-IMS for the analysis of volatiles in biogas

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Alexander Nitschke
  • Moritz Hitzemann
  • Jonas Winkelholz
  • Tim Kobelt
  • Christian Thoben
  • Martin Lippmann
  • Lennard Stolpe
  • Henrik Plinke
  • Stefan Zimmermann

External Research Organisations

  • Jürgen-Heinrich & Annegret Plinke GbR “Plinke Biogas“
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Details

Original languageEnglish
Article number120941
Number of pages9
JournalRenewable energy
Volume231
Early online date9 Jul 2024
Publication statusPublished - Sept 2024

Abstract

The Renewable Energy Act 2023 (§39i) requires reducing corn silage in biogas plants from 40 % to 30 % in 2026. Since corn silage yields the highest biogas per weight unit of all biogas feedstocks, this poses new challenges for biogas plant operators. However, alternative biogas feedstocks not harvested directly from the field may contain siloxanes due to the use of care products and disinfectants. The conversion of siloxanes into silicon dioxide during the combustion process seriously threatens the lifetime and efficiency of the used gas engine, even in very low concentrations. Consequently, we present a highly sensitive measurement system for monitoring biogas. Detection limits down to 0.037 mg/m³ for the tested siloxanes have been reached. Furthermore, ketones can be detected down to 0.002 mg/m³, alcohols down to 0.001 mg/m³. The device combines an ultra-fast polarity switching ion mobility spectrometer with a switching time of 12 ms and a resolving power of RP = 70, a gas chromatographic pre-separation, and a non-dispersive infrared sensor for methane. In this context, we analyzed the biogas composition for volatile substances and siloxanes, whereby we only found the volatile substances. For demonstration, biogas was analyzed at three different stages during the gas purification process.

Keywords

    Biogas, Biogas plant, Gas chromatography, Ion mobility spectrometry, Renewable energy, Siloxanes

ASJC Scopus subject areas

Sustainable Development Goals

Cite this

Ultra-fast polarity switching GC-IMS for the analysis of volatiles in biogas. / Nitschke, Alexander; Hitzemann, Moritz; Winkelholz, Jonas et al.
In: Renewable energy, Vol. 231, 120941, 09.2024.

Research output: Contribution to journalArticleResearchpeer review

Nitschke, A, Hitzemann, M, Winkelholz, J, Kobelt, T, Thoben, C, Lippmann, M, Stolpe, L, Plinke, H & Zimmermann, S 2024, 'Ultra-fast polarity switching GC-IMS for the analysis of volatiles in biogas', Renewable energy, vol. 231, 120941. https://doi.org/10.1016/j.renene.2024.120941
Nitschke, A., Hitzemann, M., Winkelholz, J., Kobelt, T., Thoben, C., Lippmann, M., Stolpe, L., Plinke, H., & Zimmermann, S. (2024). Ultra-fast polarity switching GC-IMS for the analysis of volatiles in biogas. Renewable energy, 231, Article 120941. https://doi.org/10.1016/j.renene.2024.120941
Nitschke A, Hitzemann M, Winkelholz J, Kobelt T, Thoben C, Lippmann M et al. Ultra-fast polarity switching GC-IMS for the analysis of volatiles in biogas. Renewable energy. 2024 Sept;231:120941. Epub 2024 Jul 9. doi: 10.1016/j.renene.2024.120941
Nitschke, Alexander ; Hitzemann, Moritz ; Winkelholz, Jonas et al. / Ultra-fast polarity switching GC-IMS for the analysis of volatiles in biogas. In: Renewable energy. 2024 ; Vol. 231.
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