NMR study of unhydrated water in hydrate of porous media

被引：0

作者：

Zhan J. ^{[1
,2
]}

Zhang P. ^{[1
]}

Wang Y. ^{[3
]}

Wu Q. ^{[1
]}

机构：

[1] State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Science, Lanzhou

[2] University of Chinese Academy of Science, Beijing

[3] School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou

来源：

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2022年 / 53卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Low-field NMR; Porous media; Signal intensity; T[!sub]2[!/sub] relaxation time; Unhydrated water;

D O I：

10.11817/j.issn.1672-7207.2022.04.036

中图分类号：

学科分类号：

摘要：

Low-field nuclear magnetic resonance(NMR) technology was used to study unhydrated water in the hydrate of porous media. On that basis, a novel quantitative experimental approach to identify the unhydrated water content in the hydrate of the porous media was proposed. The results show that the smaller the particle size is, the higher the content of unhydrated water is. When the particle sizes are the same, the higher the initial water content is, the higher the content of unhydrated water will be. Meanwhile, a lower initial pressure is associated with a higher content of unhydrated water. When the content of unhydrated water is high, it is mainly distributed in the relatively large and large pores. However, when the content of unhydrated water is low, it is generally found in the relatively large and small pores. The particle size, initial water content, and initial pressure affect water migration during the formation of hydrate, which can ultimately affect the content and distribution of the unhydrated water in the pores. ©2022, Central South University Press. All right reserved.

引用

页码：1525 / 1535

页数：10

共 31 条

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