Experimental Measurements of Wax Precipitation Using a Modified Method of Simultaneous Centrifugation and High-Temperature Gas Chromatography

Wax precipitation and deposition are serious flow assurance problems. Wax precipitation is investigated simultaneously using centrifugation and high-temperature gas chromatography (C-HTGC) to obtain the amount and component distribution of precipitated wax in artificial waxy oil and diesel at differ...

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Autores principales:	Huishu Liu, Jimiao Duan, Jiang Li, Hao Yan, Jian Wang, Keyu Lin, Liang Guan, Changjun Li
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	wax precipitation oil centrifugation high-temperature gas chromatography Technology T
Acceso en línea:	https://doaj.org/article/d932ebb6c07f440aa5c0eb7a20aea4e8
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spelling	oai:doaj.org-article:d932ebb6c07f440aa5c0eb7a20aea4e82021-11-11T15:51:06ZExperimental Measurements of Wax Precipitation Using a Modified Method of Simultaneous Centrifugation and High-Temperature Gas Chromatography10.3390/en142170351996-1073https://doaj.org/article/d932ebb6c07f440aa5c0eb7a20aea4e82021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/7035https://doaj.org/toc/1996-1073Wax precipitation and deposition are serious flow assurance problems. Wax precipitation is investigated simultaneously using centrifugation and high-temperature gas chromatography (C-HTGC) to obtain the amount and component distribution of precipitated wax in artificial waxy oil and diesel at different temperatures. However, the conventional C-HTGC method gives upper measurements of the amount of precipitated wax, as it ignores wax dissolved in crude oil in the centrifugal cake. A modified C-HTGC method was developed to obtain the precipitated solid fraction of crude oil, based on the mass balances of the non-crystallized fraction of the centrifuged cake. The weight, percent and carbon number distribution of precipitated solid wax crystals at different temperatures of artificial oil and 0# diesel were obtained. It was found that wax precipitation characteristics are affected by many factors, including the carbon number distribution of the oil, the sensitivity of alkane crystallization to temperature and the temperature of the waxy oil solution. The average carbon number of alkanes in precipitated wax crystals decreases with the decrease in temperature. The distribution of alkanes in solid wax crystals is roughly the same as that in 0# diesel but slightly heavier than in diesel. Alkanes with high carbon numbers precipitate simultaneously with those with low carbon numbers.Huishu LiuJimiao DuanJiang LiHao YanJian WangKeyu LinLiang GuanChangjun LiMDPI AGarticlewax precipitationoilcentrifugationhigh-temperature gas chromatographyTechnologyTENEnergies, Vol 14, Iss 7035, p 7035 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	wax precipitation oil centrifugation high-temperature gas chromatography Technology T
spellingShingle	wax precipitation oil centrifugation high-temperature gas chromatography Technology T Huishu Liu Jimiao Duan Jiang Li Hao Yan Jian Wang Keyu Lin Liang Guan Changjun Li Experimental Measurements of Wax Precipitation Using a Modified Method of Simultaneous Centrifugation and High-Temperature Gas Chromatography
description	Wax precipitation and deposition are serious flow assurance problems. Wax precipitation is investigated simultaneously using centrifugation and high-temperature gas chromatography (C-HTGC) to obtain the amount and component distribution of precipitated wax in artificial waxy oil and diesel at different temperatures. However, the conventional C-HTGC method gives upper measurements of the amount of precipitated wax, as it ignores wax dissolved in crude oil in the centrifugal cake. A modified C-HTGC method was developed to obtain the precipitated solid fraction of crude oil, based on the mass balances of the non-crystallized fraction of the centrifuged cake. The weight, percent and carbon number distribution of precipitated solid wax crystals at different temperatures of artificial oil and 0# diesel were obtained. It was found that wax precipitation characteristics are affected by many factors, including the carbon number distribution of the oil, the sensitivity of alkane crystallization to temperature and the temperature of the waxy oil solution. The average carbon number of alkanes in precipitated wax crystals decreases with the decrease in temperature. The distribution of alkanes in solid wax crystals is roughly the same as that in 0# diesel but slightly heavier than in diesel. Alkanes with high carbon numbers precipitate simultaneously with those with low carbon numbers.
format	article
author	Huishu Liu Jimiao Duan Jiang Li Hao Yan Jian Wang Keyu Lin Liang Guan Changjun Li
author_facet	Huishu Liu Jimiao Duan Jiang Li Hao Yan Jian Wang Keyu Lin Liang Guan Changjun Li
author_sort	Huishu Liu
title	Experimental Measurements of Wax Precipitation Using a Modified Method of Simultaneous Centrifugation and High-Temperature Gas Chromatography
title_short	Experimental Measurements of Wax Precipitation Using a Modified Method of Simultaneous Centrifugation and High-Temperature Gas Chromatography
title_full	Experimental Measurements of Wax Precipitation Using a Modified Method of Simultaneous Centrifugation and High-Temperature Gas Chromatography
title_fullStr	Experimental Measurements of Wax Precipitation Using a Modified Method of Simultaneous Centrifugation and High-Temperature Gas Chromatography
title_full_unstemmed	Experimental Measurements of Wax Precipitation Using a Modified Method of Simultaneous Centrifugation and High-Temperature Gas Chromatography
title_sort	experimental measurements of wax precipitation using a modified method of simultaneous centrifugation and high-temperature gas chromatography
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/d932ebb6c07f440aa5c0eb7a20aea4e8
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Experimental Measurements of Wax Precipitation Using a Modified Method of Simultaneous Centrifugation and High-Temperature Gas Chromatography

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