Effect of a Terminated PVCap on Methane Gas Hydrate Formation
Polyvinylcaprolactam (PVCap) is an economic kinetic inhibitor for hydrate formation in pipelines during oil and gas transportation. However, its application is limited because of the low inhibition performance under certain conditions. In this work, a modified PVCap on its chain end is proposed. 2-a...
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ftdoajarticles:oai:doaj.org/article:8a38e4bc45ab4cd4b863dab1de683203 2023-05-15T17:12:08+02:00 Effect of a Terminated PVCap on Methane Gas Hydrate Formation Zhiguang Song Shiyuan Cui Cuiping Tang Yong Chen Deqing Liang Sibo Wang 2023-01-01T00:00:00Z https://doi.org/10.3390/jmse11020282 https://doaj.org/article/8a38e4bc45ab4cd4b863dab1de683203 EN eng MDPI AG https://www.mdpi.com/2077-1312/11/2/282 https://doaj.org/toc/2077-1312 doi:10.3390/jmse11020282 2077-1312 https://doaj.org/article/8a38e4bc45ab4cd4b863dab1de683203 Journal of Marine Science and Engineering, Vol 11, Iss 282, p 282 (2023) natural gas hydrate formation inhibition modification Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 article 2023 ftdoajarticles https://doi.org/10.3390/jmse11020282 2023-02-26T01:29:40Z Polyvinylcaprolactam (PVCap) is an economic kinetic inhibitor for hydrate formation in pipelines during oil and gas transportation. However, its application is limited because of the low inhibition performance under certain conditions. In this work, a modified PVCap on its chain end is proposed. 2-amino-3-propionic acid mercapto-terminated polyvinyl caprolactam (PVCap-NH <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math> -COOH) was synthesized and its performance as a KHI for methane hydrate formation was evaluated under different conditions. Results showed that the performance of PVCap-NH <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math> -COOH as a KHI was better than that of PVCap at the same concentrations. Gas hydrate samples with 1 wt.% PVCap-NH <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math> -COOH were measured using Raman spectroscopy, XRD, and cryo-SEM. PVCap-NH <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math> -COOH had a selective action on a specific crystal surface of the hydrates and could prevent methane molecules from entering large cages. Its inhibition ability increased with the decrease in the occupancy rate of large cages. The morphology of the gas hydrate crystal changed from porous in a pure water system to a chaotic but compact structure state in the system with PVCap-NH <math xmlns="http://www.w3.org/1998/Math/MathML" ... Article in Journal/Newspaper Methane hydrate Directory of Open Access Journals: DOAJ Articles Journal of Marine Science and Engineering 11 2 282 |
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natural gas hydrate formation inhibition modification Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 |
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natural gas hydrate formation inhibition modification Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 Zhiguang Song Shiyuan Cui Cuiping Tang Yong Chen Deqing Liang Sibo Wang Effect of a Terminated PVCap on Methane Gas Hydrate Formation |
topic_facet |
natural gas hydrate formation inhibition modification Naval architecture. Shipbuilding. Marine engineering VM1-989 Oceanography GC1-1581 |
description |
Polyvinylcaprolactam (PVCap) is an economic kinetic inhibitor for hydrate formation in pipelines during oil and gas transportation. However, its application is limited because of the low inhibition performance under certain conditions. In this work, a modified PVCap on its chain end is proposed. 2-amino-3-propionic acid mercapto-terminated polyvinyl caprolactam (PVCap-NH <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math> -COOH) was synthesized and its performance as a KHI for methane hydrate formation was evaluated under different conditions. Results showed that the performance of PVCap-NH <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math> -COOH as a KHI was better than that of PVCap at the same concentrations. Gas hydrate samples with 1 wt.% PVCap-NH <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math> -COOH were measured using Raman spectroscopy, XRD, and cryo-SEM. PVCap-NH <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mrow></mrow><mn>2</mn></msub></semantics></math> -COOH had a selective action on a specific crystal surface of the hydrates and could prevent methane molecules from entering large cages. Its inhibition ability increased with the decrease in the occupancy rate of large cages. The morphology of the gas hydrate crystal changed from porous in a pure water system to a chaotic but compact structure state in the system with PVCap-NH <math xmlns="http://www.w3.org/1998/Math/MathML" ... |
format |
Article in Journal/Newspaper |
author |
Zhiguang Song Shiyuan Cui Cuiping Tang Yong Chen Deqing Liang Sibo Wang |
author_facet |
Zhiguang Song Shiyuan Cui Cuiping Tang Yong Chen Deqing Liang Sibo Wang |
author_sort |
Zhiguang Song |
title |
Effect of a Terminated PVCap on Methane Gas Hydrate Formation |
title_short |
Effect of a Terminated PVCap on Methane Gas Hydrate Formation |
title_full |
Effect of a Terminated PVCap on Methane Gas Hydrate Formation |
title_fullStr |
Effect of a Terminated PVCap on Methane Gas Hydrate Formation |
title_full_unstemmed |
Effect of a Terminated PVCap on Methane Gas Hydrate Formation |
title_sort |
effect of a terminated pvcap on methane gas hydrate formation |
publisher |
MDPI AG |
publishDate |
2023 |
url |
https://doi.org/10.3390/jmse11020282 https://doaj.org/article/8a38e4bc45ab4cd4b863dab1de683203 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_source |
Journal of Marine Science and Engineering, Vol 11, Iss 282, p 282 (2023) |
op_relation |
https://www.mdpi.com/2077-1312/11/2/282 https://doaj.org/toc/2077-1312 doi:10.3390/jmse11020282 2077-1312 https://doaj.org/article/8a38e4bc45ab4cd4b863dab1de683203 |
op_doi |
https://doi.org/10.3390/jmse11020282 |
container_title |
Journal of Marine Science and Engineering |
container_volume |
11 |
container_issue |
2 |
container_start_page |
282 |
_version_ |
1766068914254512128 |