Accurate measurement of Soret coefficients in binary hydrocarbons mixtures based on composite methods

doi:10.1016/j.chroma.2024.465346

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	Accurate measurement of Soret coefficients in binary hydrocarbons mixtures based on composite methods
	Zhao, Renbao 1; Wang, Jiaying 1; Xu, Haotian 1; Wang, Jinming 1,3; Cui, Yifang 1; Yao, Quan 2; Xu SH(徐升华)4 ; Liu, Jiyang 1
通讯作者	Zhao, Renbao([email protected])
发表期刊	JOURNAL OF CHROMATOGRAPHY A
	2024-10-25
卷号	1735 页码:14
ISSN	0021-9673
摘要	The Soret effect is a significant factor in various scenarios, with thermodiffusion in binary systems serving as a common method for the study. Most research focuses rarely on the distribution characteristics of components in diffusion systems; and Soret coefficients in the porous media could not be obtained by typical methods based on the thermodiffusion column, which are particularly important in the field of oil and gas development. Moreover, experiments on ground conditions have struggled to determine the Soret coefficient accurately due to the convective effect caused by gravity differentiation. The thermodiffusion behavior of n-pentane (C5) and nheptane (C7) binary mixtures in both bulk and porous media conditions have been investigated, aiming to provide corrected coefficients that mitigate the influence of gravity using theoretical derivation. A new method was proposed to calculate the Soret coefficients in this work by establishing a model based on gas chromatography technology. Dynamic variation of component concentration along the path was studied, and the corresponding Soret coefficients were calculated and analyzed in parallel. The results indicate that the concentration and temperature exhibit a logarithmic relationship with the distance from the heat source. The Soret coefficient values obtained from measurements in porous media are closer to the theoretically corrected values, which do not account for gravity effects. Additionally, as the permeability decreases, the counteracting effect of porous media on convection becomes more pronounced. Therefore, it presents a novel method for accurately measuring the Soret coefficient that ignores convection to some extent.
关键词	Soret coefficient Thermolsolutal convection Binary system Porous media Component distribution
DOI	10.1016/j.chroma.2024.465346
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:001312800300001
关键词[WOS]	DIFFUSION MEASUREMENTS ; OPTICAL MEASUREMENT ; THERMAL-DIFFUSION ; THERMODIFFUSION ; FLOW
WOS研究方向	Biochemistry & Molecular Biology ; Chemistry
WOS类目	Biochemical Research Methods ; Chemistry, Analytical
资助项目	Joint Fund Program of The National Natural Science Foundation of China[U1738108] ; Joint Fund Program of The National Natural Science Foundation of China[52274052]
项目资助者	Joint Fund Program of The National Natural Science Foundation of China
论文分区	二类/Q1
力学所作者排名	3+
RpAuthor	Zhao, Renbao
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/96612
专题	非线性力学国家重点实验室
作者单位	1.China Univ Petr, State Key Lab Petr Resources & Engn, Beijing 102249, Peoples R China; 2.China Univ Petr Beijing Karamay, Petr Inst, Karamay 834000, Peoples R China; 3.Offshore Oil Engn Co Ltd, Tianjin 300461, Peoples R China; 4.Chinese Acad Sci, Key Lab Micrograv, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Renbao,Wang, Jiaying,Xu, Haotian,et al. Accurate measurement of Soret coefficients in binary hydrocarbons mixtures based on composite methods[J]. JOURNAL OF CHROMATOGRAPHY A,2024,1735:14.Rp_Au:Zhao, Renbao
APA	Zhao, Renbao.,Wang, Jiaying.,Xu, Haotian.,Wang, Jinming.,Cui, Yifang.,...&Liu, Jiyang.(2024).Accurate measurement of Soret coefficients in binary hydrocarbons mixtures based on composite methods.JOURNAL OF CHROMATOGRAPHY A,1735,14.
MLA	Zhao, Renbao,et al."Accurate measurement of Soret coefficients in binary hydrocarbons mixtures based on composite methods".JOURNAL OF CHROMATOGRAPHY A 1735(2024):14.