Formation of a Low-Density Liquid Phase during the Dissociation of Gas Hydrates in Confined Environments
The large amounts of natural gas in a dense solid phase stored in the confined environment of porous materials have become a new, potential method for storing and transporting natural gas. However, there is no experimental evidence to accurately determine the phase state of water during nanoscale ga...
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MDPI AG
2021-02-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/3/590 |
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| author | Lihua Wan Xiaoya Zang Juan Fu Xuebing Zhou Jingsheng Lu Jinan Guan Deqing Liang |
| author_facet | Lihua Wan Xiaoya Zang Juan Fu Xuebing Zhou Jingsheng Lu Jinan Guan Deqing Liang |
| author_sort | Lihua Wan |
| collection | DOAJ |
| description | The large amounts of natural gas in a dense solid phase stored in the confined environment of porous materials have become a new, potential method for storing and transporting natural gas. However, there is no experimental evidence to accurately determine the phase state of water during nanoscale gas hydrate dissociation. The results on the dissociation behavior of methane hydrates confined in a nanosilica gel and the contained water phase state during hydrate dissociation at temperatures below the ice point and under atmospheric pressure are presented. Fourier transform infrared spectroscopy (FTIR) and powder X-ray diffraction (PXRD) were used to trace the dissociation of confined methane hydrate synthesized from pore water confined inside the nanosilica gel. The characterization of the confined methane hydrate was also analyzed by PXRD. It was found that the confined methane hydrates dissociated into ultra viscous low-density liquid water (LDL) and methane gas. The results showed that the mechanism of confined methane hydrate dissociation at temperatures below the ice point depended on the phase state of water during hydrate dissociation. |
| first_indexed | 2024-03-09T00:29:25Z |
| format | Article |
| id | doaj.art-6df191941fe74474aa95cd83b02a3f76 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T00:29:25Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-6df191941fe74474aa95cd83b02a3f762023-12-11T18:37:57ZengMDPI AGNanomaterials2079-49912021-02-0111359010.3390/nano11030590Formation of a Low-Density Liquid Phase during the Dissociation of Gas Hydrates in Confined EnvironmentsLihua Wan0Xiaoya Zang1Juan Fu2Xuebing Zhou3Jingsheng Lu4Jinan Guan5Deqing Liang6Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, ChinaGuangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, ChinaGuangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, ChinaGuangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, ChinaGuangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, ChinaGuangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, ChinaGuangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, ChinaThe large amounts of natural gas in a dense solid phase stored in the confined environment of porous materials have become a new, potential method for storing and transporting natural gas. However, there is no experimental evidence to accurately determine the phase state of water during nanoscale gas hydrate dissociation. The results on the dissociation behavior of methane hydrates confined in a nanosilica gel and the contained water phase state during hydrate dissociation at temperatures below the ice point and under atmospheric pressure are presented. Fourier transform infrared spectroscopy (FTIR) and powder X-ray diffraction (PXRD) were used to trace the dissociation of confined methane hydrate synthesized from pore water confined inside the nanosilica gel. The characterization of the confined methane hydrate was also analyzed by PXRD. It was found that the confined methane hydrates dissociated into ultra viscous low-density liquid water (LDL) and methane gas. The results showed that the mechanism of confined methane hydrate dissociation at temperatures below the ice point depended on the phase state of water during hydrate dissociation.https://www.mdpi.com/2079-4991/11/3/590nanoscale gas hydratenanoscale poresdecomposition mechanismlow-density liquid waterdissociation behavior |
| spellingShingle | Lihua Wan Xiaoya Zang Juan Fu Xuebing Zhou Jingsheng Lu Jinan Guan Deqing Liang Formation of a Low-Density Liquid Phase during the Dissociation of Gas Hydrates in Confined Environments Nanomaterials nanoscale gas hydrate nanoscale pores decomposition mechanism low-density liquid water dissociation behavior |
| title | Formation of a Low-Density Liquid Phase during the Dissociation of Gas Hydrates in Confined Environments |
| title_full | Formation of a Low-Density Liquid Phase during the Dissociation of Gas Hydrates in Confined Environments |
| title_fullStr | Formation of a Low-Density Liquid Phase during the Dissociation of Gas Hydrates in Confined Environments |
| title_full_unstemmed | Formation of a Low-Density Liquid Phase during the Dissociation of Gas Hydrates in Confined Environments |
| title_short | Formation of a Low-Density Liquid Phase during the Dissociation of Gas Hydrates in Confined Environments |
| title_sort | formation of a low density liquid phase during the dissociation of gas hydrates in confined environments |
| topic | nanoscale gas hydrate nanoscale pores decomposition mechanism low-density liquid water dissociation behavior |
| url | https://www.mdpi.com/2079-4991/11/3/590 |
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