Online Monitoring of Catalytic Processes by Fiber-Enhanced Raman Spectroscopy
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 sc...
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MDPI AG
2024-11-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/24/23/7501 |
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| author | John T. Kelly Christopher J. Koch Robert Lascola Tyler Guin |
| author_facet | John T. Kelly Christopher J. Koch Robert Lascola Tyler Guin |
| author_sort | John T. Kelly |
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| description | 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: CO<sub>2</sub> methanation (CO<sub>2</sub> + 4H<sub>2</sub> → CH<sub>4</sub> + 2H<sub>2</sub>O) and ammonia cracking (2NH<sub>3</sub> → N<sub>2</sub> + 3H<sub>2</sub>). 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. |
| format | Article |
| id | doaj-art-2a1146d2ed034e34820a61ccc49a29d6 |
| institution | OA Journals |
| issn | 1424-8220 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
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| series | Sensors |
| spelling | doaj-art-2a1146d2ed034e34820a61ccc49a29d62025-08-20T01:55:33ZengMDPI AGSensors1424-82202024-11-012423750110.3390/s24237501Online Monitoring of Catalytic Processes by Fiber-Enhanced Raman SpectroscopyJohn T. Kelly0Christopher J. Koch1Robert Lascola2Tyler Guin3Savannah River National Laboratory, 301 Gateway Drive, Aiken, SC 29803, USASavannah River National Laboratory, 301 Gateway Drive, Aiken, SC 29803, USASavannah River National Laboratory, 301 Gateway Drive, Aiken, SC 29803, USASavannah River National Laboratory, 301 Gateway Drive, Aiken, SC 29803, USAAn 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: CO<sub>2</sub> methanation (CO<sub>2</sub> + 4H<sub>2</sub> → CH<sub>4</sub> + 2H<sub>2</sub>O) and ammonia cracking (2NH<sub>3</sub> → N<sub>2</sub> + 3H<sub>2</sub>). 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.https://www.mdpi.com/1424-8220/24/23/7501Raman spectroscopyfiber enhancementhydrogen gascatalytic reaction monitoringhollow waveguide |
| spellingShingle | John T. Kelly Christopher J. Koch Robert Lascola Tyler Guin Online Monitoring of Catalytic Processes by Fiber-Enhanced Raman Spectroscopy Sensors Raman spectroscopy fiber enhancement hydrogen gas catalytic reaction monitoring hollow waveguide |
| title | Online Monitoring of Catalytic Processes by Fiber-Enhanced Raman Spectroscopy |
| title_full | Online Monitoring of Catalytic Processes by Fiber-Enhanced Raman Spectroscopy |
| title_fullStr | Online Monitoring of Catalytic Processes by Fiber-Enhanced Raman Spectroscopy |
| title_full_unstemmed | Online Monitoring of Catalytic Processes by Fiber-Enhanced Raman Spectroscopy |
| title_short | Online Monitoring of Catalytic Processes by Fiber-Enhanced Raman Spectroscopy |
| title_sort | online monitoring of catalytic processes by fiber enhanced raman spectroscopy |
| topic | Raman spectroscopy fiber enhancement hydrogen gas catalytic reaction monitoring hollow waveguide |
| url | https://www.mdpi.com/1424-8220/24/23/7501 |
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