Analysis of the Dissolution of CH<sub>4</sub>/CO<sub>2</sub>-Mixtures into Liquid Water and the Subsequent Hydrate Formation via In Situ Raman Spectroscopy
We report an experimental study for the investigation into the suitability of hydrate formation processes for the purification of methane (CH<sub>4</sub>) from carbon dioxide (CO<sub>2</sub>) at a sub-cooling temperature of 6 K and a pressure of 4 MPa. The experiments were co...
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MDPI AG
2020-02-01
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| Online Access: | https://www.mdpi.com/1996-1073/13/4/793 |
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| author | Zheng Li Christine C. Holzammer Andreas S. Braeuer |
| author_facet | Zheng Li Christine C. Holzammer Andreas S. Braeuer |
| author_sort | Zheng Li |
| collection | DOAJ |
| description | We report an experimental study for the investigation into the suitability of hydrate formation processes for the purification of methane (CH<sub>4</sub>) from carbon dioxide (CO<sub>2</sub>) at a sub-cooling temperature of 6 K and a pressure of 4 MPa. The experiments were conducted in a stirred batch reactor. Three different initial CH<sub>4</sub>/CO<sub>2</sub> mixtures with methane fractions of 70.1 mol%, 50.3 mol%, and 28.5 mol% were tested. The separation efficiency was quantified by measuring in situ via Raman spectroscopy the ratios of CH<sub>4</sub>/CO<sub>2</sub> in the gas mixture, the liquid water-rich phase before hydrate formation, and the solid hydrate phase after the onset of the hydrate formation. The results indicated that the main separation effect is obtained due to the preferential dissolution of CO<sub>2</sub> into the liquid water-rich phase before the onset of the hydrate formation. |
| first_indexed | 2024-04-11T21:47:24Z |
| format | Article |
| id | doaj.art-10423040b7874ee0a6ef59312754dc06 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T21:47:24Z |
| publishDate | 2020-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-10423040b7874ee0a6ef59312754dc062022-12-22T04:01:21ZengMDPI AGEnergies1996-10732020-02-0113479310.3390/en13040793en13040793Analysis of the Dissolution of CH<sub>4</sub>/CO<sub>2</sub>-Mixtures into Liquid Water and the Subsequent Hydrate Formation via In Situ Raman SpectroscopyZheng Li0Christine C. Holzammer1Andreas S. Braeuer2Institute of Thermal-, Environmental-, and Resources’ Process Engineering (ITUN), Technische Universität Bergakademie Freiberg (TUBAF), 09599 Freiberg, GermanyInstitute of Thermal-, Environmental-, and Resources’ Process Engineering (ITUN), Technische Universität Bergakademie Freiberg (TUBAF), 09599 Freiberg, GermanyInstitute of Thermal-, Environmental-, and Resources’ Process Engineering (ITUN), Technische Universität Bergakademie Freiberg (TUBAF), 09599 Freiberg, GermanyWe report an experimental study for the investigation into the suitability of hydrate formation processes for the purification of methane (CH<sub>4</sub>) from carbon dioxide (CO<sub>2</sub>) at a sub-cooling temperature of 6 K and a pressure of 4 MPa. The experiments were conducted in a stirred batch reactor. Three different initial CH<sub>4</sub>/CO<sub>2</sub> mixtures with methane fractions of 70.1 mol%, 50.3 mol%, and 28.5 mol% were tested. The separation efficiency was quantified by measuring in situ via Raman spectroscopy the ratios of CH<sub>4</sub>/CO<sub>2</sub> in the gas mixture, the liquid water-rich phase before hydrate formation, and the solid hydrate phase after the onset of the hydrate formation. The results indicated that the main separation effect is obtained due to the preferential dissolution of CO<sub>2</sub> into the liquid water-rich phase before the onset of the hydrate formation.https://www.mdpi.com/1996-1073/13/4/793gas hydrates<i>in situ</i> raman spectroscopymolar ratiocarbon dioxidemethane |
| spellingShingle | Zheng Li Christine C. Holzammer Andreas S. Braeuer Analysis of the Dissolution of CH<sub>4</sub>/CO<sub>2</sub>-Mixtures into Liquid Water and the Subsequent Hydrate Formation via In Situ Raman Spectroscopy Energies gas hydrates <i>in situ</i> raman spectroscopy molar ratio carbon dioxide methane |
| title | Analysis of the Dissolution of CH<sub>4</sub>/CO<sub>2</sub>-Mixtures into Liquid Water and the Subsequent Hydrate Formation via In Situ Raman Spectroscopy |
| title_full | Analysis of the Dissolution of CH<sub>4</sub>/CO<sub>2</sub>-Mixtures into Liquid Water and the Subsequent Hydrate Formation via In Situ Raman Spectroscopy |
| title_fullStr | Analysis of the Dissolution of CH<sub>4</sub>/CO<sub>2</sub>-Mixtures into Liquid Water and the Subsequent Hydrate Formation via In Situ Raman Spectroscopy |
| title_full_unstemmed | Analysis of the Dissolution of CH<sub>4</sub>/CO<sub>2</sub>-Mixtures into Liquid Water and the Subsequent Hydrate Formation via In Situ Raman Spectroscopy |
| title_short | Analysis of the Dissolution of CH<sub>4</sub>/CO<sub>2</sub>-Mixtures into Liquid Water and the Subsequent Hydrate Formation via In Situ Raman Spectroscopy |
| title_sort | analysis of the dissolution of ch sub 4 sub co sub 2 sub mixtures into liquid water and the subsequent hydrate formation via in situ raman spectroscopy |
| topic | gas hydrates <i>in situ</i> raman spectroscopy molar ratio carbon dioxide methane |
| url | https://www.mdpi.com/1996-1073/13/4/793 |
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