Comprehensive multi-gas study by means of fiber-enhanced Raman spectroscopy for the investigation of nitrogen cycle processes

Blohm, Annika; Domes, Christian; Merian, Andreas; Wolf, Sebastian; Popp, Jürgen; Frosch, Torsten

doi:10.1039/d4an00023d

Analyst

2024

DOI: 10.1039/d4an00023d

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Comprehensive multi-gas study by means of fiber-enhanced Raman spectroscopy for the investigation of nitrogen cycle processes

Annika Blohm,

Christian Domes,

Andreas Merian

et al.

Abstract: Fiber-enhanced Raman spectroscopy allows for simultaneous quantification of multiple gases and enables the comprehensive analysis of processes of the nitrogen cycle with the aim to reduce the emission of reactive nitrogen species in agriculture.

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Cited by 2 publications

References 88 publications

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Dynamic Detection of Decomposition Gases in Eco-Friendly C₅F₁₀O Gas-Insulated Power Equipment by Fiber-Enhanced Raman Spectroscopy

Kong,

Wan,

Lei

et al. 2024

Anal. Chem.

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Dynamic detection of multiple C5F10O decomposition gases can more comprehensively and effectively evaluate the operating status of eco-friendly gas-insulated power equipment (GIPE), which is a technical support for promoting the construction of eco-friendly, low-carbon energy power systems. In this article, we propose a silicon noise suppression fiber-enhanced Raman spectroscopy (FERS) technique and design a FERS sensing system for the dynamic detection of multiple C5F10O decomposition gases. Benefiting from the effective hybrid silicon noise filtering technology, the spectrum noise of FERS can be suppressed by 90% and the system detection sensitivity can be improved by 4.22 times. Utilizing a 2 m-long antiresonant hollow-core fiber, the system achieved detection limits of 1.34 and 1.44 ppmv for CF4 and CO2, respectively, under the conditions of a laser power of 200 mW, a pressure of 0.5 MPa, and a measurement time of 120 s. Afterward, combining sample gas and density functional theory simulation, the characteristic peak positions for quantitative analysis of C5F10O decomposition gas were determined as follows: CF4: 906 cm–1, CO2: 1388 cm–1, C5F10O: 759 cm–1, CF2O: 965 cm–1, CF3H: 1117 cm–1, C2F4: 517 cm–1, C2F6: 807 cm–1, C3F6: 767 cm–1, C3F8: 780 cm–1, C3F7H: 857 cm–1, and C4F10: 770 cm–1. Finally, the sensing system conducted dynamic measurements of the partial discharge decomposition gases of the C5F10O GIPE for 5 days with a 2 h measurement interval. The content trends of C5F10O and decomposition gases CF4, CO2, C3F6, and C3F7H were obtained. These results fully demonstrate the capability of FERS technology for dynamically detecting the decomposition gases of the C5F10O GIPE.

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Dynamic Detection of Decomposition Gases in Eco-Friendly C₅F₁₀O Gas-Insulated Power Equipment by Fiber-Enhanced Raman Spectroscopy

Kong,

Wan,

Lei

et al. 2024

Anal. Chem.

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Online Monitoring of Catalytic Processes by Fiber-Enhanced Raman Spectroscopy

Kelly,

Koch,

Lascola

et al. 2024

Sensors

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An innovative solution for real-time monitoring of reactions within confined spaces, optimized for Raman spectroscopy applications, is presented. This approach involves the utilization of a hollow-core waveguide configured as a compact flow cell, serving both as a conduit for Raman excitation and scattering and seamlessly integrating into the effluent stream of a cracking catalytic reactor. The analytical technique, encompassing device and optical design, ensures robustness, compactness, and cost-effectiveness for implementation into process facilities. Notably, the modularity of the approach empowers customization for diverse gas monitoring needs, as it readily adapts to the specific requirements of various sensing scenarios. As a proof of concept, the efficacy of a spectroscopic approach is shown by monitoring two catalytic processes: CO2 methanation (CO2 + 4H2 → CH4 + 2H2O) and ammonia cracking (2NH3 → N2 + 3H2). Leveraging chemometric data processing techniques, spectral signatures of the individual components involved in these reactions are effectively disentangled and the results are compared to mass spectrometry data. This robust methodology underscores the versatility and reliability of this monitoring system in complex chemical environments.

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Comprehensive multi-gas study by means of fiber-enhanced Raman spectroscopy for the investigation of nitrogen cycle processes

Abstract: Fiber-enhanced Raman spectroscopy allows for simultaneous quantification of multiple gases and enables the comprehensive analysis of processes of the nitrogen cycle with the aim to reduce the emission of reactive nitrogen species in agriculture.

Cited by 2 publications

References 88 publications

Dynamic Detection of Decomposition Gases in Eco-Friendly C₅F₁₀O Gas-Insulated Power Equipment by Fiber-Enhanced Raman Spectroscopy

Dynamic Detection of Decomposition Gases in Eco-Friendly C₅F₁₀O Gas-Insulated Power Equipment by Fiber-Enhanced Raman Spectroscopy

Online Monitoring of Catalytic Processes by Fiber-Enhanced Raman Spectroscopy

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Comprehensive multi-gas study by means of fiber-enhanced Raman spectroscopy for the investigation of nitrogen cycle processes

Abstract: Fiber-enhanced Raman spectroscopy allows for simultaneous quantification of multiple gases and enables the comprehensive analysis of processes of the nitrogen cycle with the aim to reduce the emission of reactive nitrogen species in agriculture.

Cited by 2 publications

References 88 publications

Dynamic Detection of Decomposition Gases in Eco-Friendly C5F10O Gas-Insulated Power Equipment by Fiber-Enhanced Raman Spectroscopy

Dynamic Detection of Decomposition Gases in Eco-Friendly C5F10O Gas-Insulated Power Equipment by Fiber-Enhanced Raman Spectroscopy

Online Monitoring of Catalytic Processes by Fiber-Enhanced Raman Spectroscopy

Contact Info

Product

Resources

About

Dynamic Detection of Decomposition Gases in Eco-Friendly C₅F₁₀O Gas-Insulated Power Equipment by Fiber-Enhanced Raman Spectroscopy

Dynamic Detection of Decomposition Gases in Eco-Friendly C₅F₁₀O Gas-Insulated Power Equipment by Fiber-Enhanced Raman Spectroscopy