个人信息Personal Information
教授
博士生导师
硕士生导师
性别:男
毕业院校:大连理工大学
学位:博士
所在单位:能源与动力学院
学科:能源与环境工程
办公地点:能动大楼810
联系方式:songyc@dlut.edu.cn
电子邮箱:songyc@dlut.edu.cn
Diffusion of CO2 in n-hexadecane determined from NMR relaxometry measurements
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论文类型:期刊论文
发表时间:2015-06-26
发表刊物:PHYSICS LETTERS A
收录刊物:SCIE、Scopus
卷号:379
期号:18-19
页面范围:1197-1201
ISSN号:0375-9601
关键字:Nuclear magnetic resonance; Relaxation time; Diffusion coefficient; Mass transfer; n-Hexadecane
摘要:In this study, we discuss the feasibility in computation of diffusion coefficient (D) using the longitudinal relaxation time T-1. CO2-n-hexadecane in pure solutions and in a porous medium was tested separately by measuring the T-1 of n-hexadecane at varying CO2 concentration (c). The relationship between T-1 and c was correlated. The results show that T-1 exponentially rises with the increase of c. Thus, we proposed the method to estimate D of CO2 using T-1 through the relationship above and Fick's law. We computed D from T-1 and compared this method with the traditional method. The two methods agree well with differences less than 10%. The new method is characterized by simpleness, convenience and flexibility, as it computes D with the only requirement of monitoring T-1. This new method will guide the use of nuclear magnetic resonance logging in in-field testing of CO2 diffusion and migration laws. (C) 2015 Elsevier B.V. All rights reserved.