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Comparison of optical feedback cavity enhanced absorption spectroscopy and gas chromatography for the measurement of the main components and impurities in biogas, landfill gas, biomethane and carbon dioxide streams
RISE Research Institutes of Sweden, Materials and Production, Applied Mechanics.ORCID iD: 0000-0002-4037-3106
RISE Research Institutes of Sweden, Materials and Production, Applied Mechanics.
RISE Research Institutes of Sweden, Materials and Production, Applied Mechanics.ORCID iD: 0000-0002-7550-8365
RISE Research Institutes of Sweden, Safety and Transport, Measurement Technology.ORCID iD: 0000-0001-5118-0150
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2023 (English)In: Measurement science and technology, ISSN 0957-0233, E-ISSN 1361-6501, Vol. 34, no 9, article id 095011Article in journal (Refereed) Published
Abstract [en]

In this study, we evaluated the performances of a custom-built optical feedback cavity enhanced absorption spectroscopy (OFCEAS) instrument for the determination of the composition of energy gases, focusing on methane and carbon dioxide as main components, and carbon monoxide as impurities, in comparison with the well-established, validated, and traceable gas chromatographic method. A total of 115 real sample gases collected in biogas plants or landfills were analyzed using with both techniques over a period of 12 months. The comparison of the techniques showed that the virtual model which allows the measurement, needs to be optimized using real samples of varied compositions. The OFCEAS measurement technique was found to be capable of measuring both the main components and a trace component in different matrices; to within a 2% measurement uncertainty (higher than the gas chromatograph/thermal conductivity detector (GC/TCD) method). The OFCEAS method exhibits a very fast response, does not require daily calibration, and can be implemented online. The agreements between the OFCEAS technique and the GC/TCD method show that the drift of the OFCEAS instruments remains acceptable in the long term as long as no change is made to the virtual model. Matrix effects were observed, and those need to be taken into consideration when analyzing different types of samples. © 2023 The Author(s). Published by IOP Publishing Ltd.

Place, publisher, year, edition, pages
Institute of Physics , 2023. Vol. 34, no 9, article id 095011
Keywords [en]
biogas, biomethane, OFCEAS, performance assessment, Absorption spectroscopy, Carbon dioxide, Carbon monoxide, Chromatographic analysis, Gas chromatography, Gas plants, Gases, Light absorption, Optical feedback, Uncertainty analysis, Cavity enhanced absorption spectroscopy, Feedback cavity, Gas chromatographs, Impurities in, Optical feedback cavity enhanced absorption spectroscopy, Real samples, Thermal conductivity detectors, Virtual models
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Chemical Sciences
Identifiers
URN: urn:nbn:se:ri:diva-65565DOI: 10.1088/1361-6501/acd94aScopus ID: 2-s2.0-85162116942OAI: oai:DiVA.org:ri-65565DiVA, id: diva2:1777563
Note

Correspondence Address: K. Arrhenius; Research Institutes of Sweden AB (RISE), Frans Perssons väg, Göteborg, 412 76, Sweden. The Joint Research Project «Metrology for decarbonizing the gas grid» is supported the European Metrology Programme for Innovation and Research (EMPIR). The EMPIR initiative is co-funded by the European Union’s Horizon 2020 research and innovation programme and the EMPIR Participating States

Available from: 2023-06-29 Created: 2023-06-29 Last updated: 2023-06-29Bibliographically approved

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Arrhenius, KarineFischer, AndreasBüker, Oliver

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