Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Wan, Lihua, Zang, Xiaoya, Fu, Juan, Zhou, Xuebing, Lu, Jingsheng, Guan, Jinan, Liang, Deqing
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7996823/
https://www.ncbi.nlm.nih.gov/pubmed/33652869
http://dx.doi.org/10.3390/nano11030590
_version_ 1783670188279857152
author Wan, Lihua
Zang, Xiaoya
Fu, Juan
Zhou, Xuebing
Lu, Jingsheng
Guan, Jinan
Liang, Deqing
author_facet Wan, Lihua
Zang, Xiaoya
Fu, Juan
Zhou, Xuebing
Lu, Jingsheng
Guan, Jinan
Liang, Deqing
author_sort Wan, Lihua
collection PubMed
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.
format Online
Article
Text
id pubmed-7996823
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-79968232021-03-27 Formation of a Low-Density Liquid Phase during the Dissociation of Gas Hydrates in Confined Environments Wan, Lihua Zang, Xiaoya Fu, Juan Zhou, Xuebing Lu, Jingsheng Guan, Jinan Liang, Deqing Nanomaterials (Basel) Article 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. MDPI 2021-02-26 /pmc/articles/PMC7996823/ /pubmed/33652869 http://dx.doi.org/10.3390/nano11030590 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ).
spellingShingle Article
Wan, Lihua
Zang, Xiaoya
Fu, Juan
Zhou, Xuebing
Lu, Jingsheng
Guan, Jinan
Liang, Deqing
Formation of a Low-Density Liquid Phase during the Dissociation of Gas Hydrates in Confined Environments
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 Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7996823/
https://www.ncbi.nlm.nih.gov/pubmed/33652869
http://dx.doi.org/10.3390/nano11030590
work_keys_str_mv AT wanlihua formationofalowdensityliquidphaseduringthedissociationofgashydratesinconfinedenvironments
AT zangxiaoya formationofalowdensityliquidphaseduringthedissociationofgashydratesinconfinedenvironments
AT fujuan formationofalowdensityliquidphaseduringthedissociationofgashydratesinconfinedenvironments
AT zhouxuebing formationofalowdensityliquidphaseduringthedissociationofgashydratesinconfinedenvironments
AT lujingsheng formationofalowdensityliquidphaseduringthedissociationofgashydratesinconfinedenvironments
AT guanjinan formationofalowdensityliquidphaseduringthedissociationofgashydratesinconfinedenvironments
AT liangdeqing formationofalowdensityliquidphaseduringthedissociationofgashydratesinconfinedenvironments