Multiscale analysis of the hydrate based carbon capture from gas mixtures containing carbon dioxide

Abstract To reveal the kinetic performance of gas molecules in hydrate growth, hydrate formation from pure CO2, flue gas, and biogas was measured using in-situ Raman and macroscopic methods at 271.6 K. In the in-situ Raman measurements, Raman peaks of gases in the hydrate phase were characterised an...

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Autores principales:	Xuebing Zhou, Xiaoya Zang, Zhen Long, Deqing Liang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/90e78b1e9b36499c906373accabbb1af
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spelling	oai:doaj.org-article:90e78b1e9b36499c906373accabbb1af2021-12-02T13:41:34ZMultiscale analysis of the hydrate based carbon capture from gas mixtures containing carbon dioxide10.1038/s41598-021-88531-x2045-2322https://doaj.org/article/90e78b1e9b36499c906373accabbb1af2021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-88531-xhttps://doaj.org/toc/2045-2322Abstract To reveal the kinetic performance of gas molecules in hydrate growth, hydrate formation from pure CO2, flue gas, and biogas was measured using in-situ Raman and macroscopic methods at 271.6 K. In the in-situ Raman measurements, Raman peaks of gases in the hydrate phase were characterised and normalised by taking the water bands from 2800 to 3800 cm−1 as a reference, whose line shapes were not found to have a noticeable change in the conversion from Ih ice to sI hydrate. The hydrate growth was suggested to start with the formation of unsaturated hydrate nuclei followed by gas adsorption. In hydrate formed from all tested gases, CO2 concentrations in hydrate nuclei were found to be 23–33% of the saturation state. In the flue gas system, the N2 concentration reached a saturation state once hydrate nuclei formed. In the biogas system, competitive adsorption of CH4 and CO2 molecules was observed, while N2 molecules hardly evolved in hydrate formation. Combined with micro- and macroscopic analysis, small molecules such as N2 and CO2 were suggested to be more active in the formation of hydrate nuclei, and the preferential adsorption of CO2 molecules took place in the subsequent gas adsorption process.Xuebing ZhouXiaoya ZangZhen LongDeqing LiangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Xuebing Zhou Xiaoya Zang Zhen Long Deqing Liang Multiscale analysis of the hydrate based carbon capture from gas mixtures containing carbon dioxide
description	Abstract To reveal the kinetic performance of gas molecules in hydrate growth, hydrate formation from pure CO2, flue gas, and biogas was measured using in-situ Raman and macroscopic methods at 271.6 K. In the in-situ Raman measurements, Raman peaks of gases in the hydrate phase were characterised and normalised by taking the water bands from 2800 to 3800 cm−1 as a reference, whose line shapes were not found to have a noticeable change in the conversion from Ih ice to sI hydrate. The hydrate growth was suggested to start with the formation of unsaturated hydrate nuclei followed by gas adsorption. In hydrate formed from all tested gases, CO2 concentrations in hydrate nuclei were found to be 23–33% of the saturation state. In the flue gas system, the N2 concentration reached a saturation state once hydrate nuclei formed. In the biogas system, competitive adsorption of CH4 and CO2 molecules was observed, while N2 molecules hardly evolved in hydrate formation. Combined with micro- and macroscopic analysis, small molecules such as N2 and CO2 were suggested to be more active in the formation of hydrate nuclei, and the preferential adsorption of CO2 molecules took place in the subsequent gas adsorption process.
format	article
author	Xuebing Zhou Xiaoya Zang Zhen Long Deqing Liang
author_facet	Xuebing Zhou Xiaoya Zang Zhen Long Deqing Liang
author_sort	Xuebing Zhou
title	Multiscale analysis of the hydrate based carbon capture from gas mixtures containing carbon dioxide
title_short	Multiscale analysis of the hydrate based carbon capture from gas mixtures containing carbon dioxide
title_full	Multiscale analysis of the hydrate based carbon capture from gas mixtures containing carbon dioxide
title_fullStr	Multiscale analysis of the hydrate based carbon capture from gas mixtures containing carbon dioxide
title_full_unstemmed	Multiscale analysis of the hydrate based carbon capture from gas mixtures containing carbon dioxide
title_sort	multiscale analysis of the hydrate based carbon capture from gas mixtures containing carbon dioxide
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/90e78b1e9b36499c906373accabbb1af
work_keys_str_mv	AT xuebingzhou multiscaleanalysisofthehydratebasedcarboncapturefromgasmixturescontainingcarbondioxide AT xiaoyazang multiscaleanalysisofthehydratebasedcarboncapturefromgasmixturescontainingcarbondioxide AT zhenlong multiscaleanalysisofthehydratebasedcarboncapturefromgasmixturescontainingcarbondioxide AT deqingliang multiscaleanalysisofthehydratebasedcarboncapturefromgasmixturescontainingcarbondioxide
_version_	1718392568254824448

Multiscale analysis of the hydrate based carbon capture from gas mixtures containing carbon dioxide

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