Details
| Original language | English |
|---|---|
| Article number | 120941 |
| Number of pages | 9 |
| Journal | Renewable energy |
| Volume | 231 |
| Early online date | 9 Jul 2024 |
| Publication status | Published - 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
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In: Renewable energy, Vol. 231, 120941, 09.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Ultra-fast polarity switching GC-IMS for the analysis of volatiles in biogas
AU - Nitschke, Alexander
AU - Hitzemann, Moritz
AU - Winkelholz, Jonas
AU - Kobelt, Tim
AU - Thoben, Christian
AU - Lippmann, Martin
AU - Stolpe, Lennard
AU - Plinke, Henrik
AU - Zimmermann, Stefan
N1 - Publisher Copyright: © 2024 The Authors
PY - 2024/9
Y1 - 2024/9
N2 - 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.
AB - 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.
KW - Biogas
KW - Biogas plant
KW - Gas chromatography
KW - Ion mobility spectrometry
KW - Renewable energy
KW - Siloxanes
UR - http://www.scopus.com/inward/record.url?scp=85198297659&partnerID=8YFLogxK
U2 - 10.1016/j.renene.2024.120941
DO - 10.1016/j.renene.2024.120941
M3 - Article
AN - SCOPUS:85198297659
VL - 231
JO - Renewable energy
JF - Renewable energy
SN - 0960-1481
M1 - 120941
ER -