In situ Raman investigation on mixed CH4-C3H8 hydrate dissociation in the presence of polyvinylpyrrolidone
The dissociation of hydrates containing kinetic inhibitors is important for the treatment of gas hydrate blockages in pipelines. In this work, the dissociation of natural gas hydrates in the presence of polyvinylpyrrolidone (PVP) was investigated by Raman spectroscopy and cryo-scanning electron micr...
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ftchacadsciegiec:oai:ir.giec.ac.cn:344007/22817 2023-05-15T17:12:04+02:00 In situ Raman investigation on mixed CH4-C3H8 hydrate dissociation in the presence of polyvinylpyrrolidone Tang, Cuiping Zhou, Xuebing Li, Dongliang Zhao, Xiangyong Liang, Deqing 2018-02-15 http://ir.giec.ac.cn/handle/344007/22817 https://doi.org/10.1016/j.fuel.2017.11.063 英语 eng ELSEVIER SCI LTD FUEL http://ir.giec.ac.cn/handle/344007/22817 doi:10.1016/j.fuel.2017.11.063 Gas hydrate Dissociation Kinetic inhibitor Raman spectra METHANE HYDRATE MOLECULAR-DYNAMICS KINETIC INHIBITORS CRYSTAL-GROWTH WATER DROPLETS DECOMPOSITION PROPANE SPECTROSCOPY SYSTEMS Energy & Fuels Engineering Chemical 期刊论文 2018 ftchacadsciegiec https://doi.org/10.1016/j.fuel.2017.11.063 2022-09-23T14:14:38Z The dissociation of hydrates containing kinetic inhibitors is important for the treatment of gas hydrate blockages in pipelines. In this work, the dissociation of natural gas hydrates in the presence of polyvinylpyrrolidone (PVP) was investigated by Raman spectroscopy and cryo-scanning electron microscope (SEM). The natural gas hydrates were formed from a synthetic natural gas mixture composed of CH4 (95.0 vol%) and C3H8 (5.0 vol%). The results showed that the crystallographic structure of the formed hydrate was structure II (sII) with CH4 encaged in both small and large cages and C3H8 in large cages. Raman spectra showed that PVP could not be captured by the sII hydrate cage and had no influence on the structural type of the hydrate. However, PVP inhibited the occupancy of CH4 molecules in the large cages. The dissociation of hydrates in the presence of PVP was slower than without PVP. No other transient structure was observed during the dissociation and gas hydrate cages were suggested to collapse as an entity, without the interference of PVP. The microstructure of the gas hydrates appeared to change from close-to-spherical to scale-like when PVP was added. Report Methane hydrate Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences: GIEC OpenIR Fuel 214 505 511 |
institution |
Open Polar |
collection |
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences: GIEC OpenIR |
op_collection_id |
ftchacadsciegiec |
language |
English |
topic |
Gas hydrate Dissociation Kinetic inhibitor Raman spectra METHANE HYDRATE MOLECULAR-DYNAMICS KINETIC INHIBITORS CRYSTAL-GROWTH WATER DROPLETS DECOMPOSITION PROPANE SPECTROSCOPY SYSTEMS Energy & Fuels Engineering Chemical |
spellingShingle |
Gas hydrate Dissociation Kinetic inhibitor Raman spectra METHANE HYDRATE MOLECULAR-DYNAMICS KINETIC INHIBITORS CRYSTAL-GROWTH WATER DROPLETS DECOMPOSITION PROPANE SPECTROSCOPY SYSTEMS Energy & Fuels Engineering Chemical Tang, Cuiping Zhou, Xuebing Li, Dongliang Zhao, Xiangyong Liang, Deqing In situ Raman investigation on mixed CH4-C3H8 hydrate dissociation in the presence of polyvinylpyrrolidone |
topic_facet |
Gas hydrate Dissociation Kinetic inhibitor Raman spectra METHANE HYDRATE MOLECULAR-DYNAMICS KINETIC INHIBITORS CRYSTAL-GROWTH WATER DROPLETS DECOMPOSITION PROPANE SPECTROSCOPY SYSTEMS Energy & Fuels Engineering Chemical |
description |
The dissociation of hydrates containing kinetic inhibitors is important for the treatment of gas hydrate blockages in pipelines. In this work, the dissociation of natural gas hydrates in the presence of polyvinylpyrrolidone (PVP) was investigated by Raman spectroscopy and cryo-scanning electron microscope (SEM). The natural gas hydrates were formed from a synthetic natural gas mixture composed of CH4 (95.0 vol%) and C3H8 (5.0 vol%). The results showed that the crystallographic structure of the formed hydrate was structure II (sII) with CH4 encaged in both small and large cages and C3H8 in large cages. Raman spectra showed that PVP could not be captured by the sII hydrate cage and had no influence on the structural type of the hydrate. However, PVP inhibited the occupancy of CH4 molecules in the large cages. The dissociation of hydrates in the presence of PVP was slower than without PVP. No other transient structure was observed during the dissociation and gas hydrate cages were suggested to collapse as an entity, without the interference of PVP. The microstructure of the gas hydrates appeared to change from close-to-spherical to scale-like when PVP was added. |
format |
Report |
author |
Tang, Cuiping Zhou, Xuebing Li, Dongliang Zhao, Xiangyong Liang, Deqing |
author_facet |
Tang, Cuiping Zhou, Xuebing Li, Dongliang Zhao, Xiangyong Liang, Deqing |
author_sort |
Tang, Cuiping |
title |
In situ Raman investigation on mixed CH4-C3H8 hydrate dissociation in the presence of polyvinylpyrrolidone |
title_short |
In situ Raman investigation on mixed CH4-C3H8 hydrate dissociation in the presence of polyvinylpyrrolidone |
title_full |
In situ Raman investigation on mixed CH4-C3H8 hydrate dissociation in the presence of polyvinylpyrrolidone |
title_fullStr |
In situ Raman investigation on mixed CH4-C3H8 hydrate dissociation in the presence of polyvinylpyrrolidone |
title_full_unstemmed |
In situ Raman investigation on mixed CH4-C3H8 hydrate dissociation in the presence of polyvinylpyrrolidone |
title_sort |
in situ raman investigation on mixed ch4-c3h8 hydrate dissociation in the presence of polyvinylpyrrolidone |
publisher |
ELSEVIER SCI LTD |
publishDate |
2018 |
url |
http://ir.giec.ac.cn/handle/344007/22817 https://doi.org/10.1016/j.fuel.2017.11.063 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
FUEL http://ir.giec.ac.cn/handle/344007/22817 doi:10.1016/j.fuel.2017.11.063 |
op_doi |
https://doi.org/10.1016/j.fuel.2017.11.063 |
container_title |
Fuel |
container_volume |
214 |
container_start_page |
505 |
op_container_end_page |
511 |
_version_ |
1766068820563197952 |