JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2021
·
IF 2.694
Jian Yang,Jiangtao Wu,Shengshan Bi
As the main components of synthetic hydrocarbons obtained using gas to liquid conversion technologies, long-chain alkanes and alcohols play an important role in the Fischer–Tropsch process. So the reliable surface tension data of these fluids are significant for the understanding and eventual improvement of synthesis efficiency. In the present study, a new high temperature and high pressure pendant drop apparatus was developed and tested with n-heptane at temperatures from (303.15 to 473.15) K, and a good agreement between the experimental data and the literature data could be found. With the new apparatus, the experimental surface tension measurements of n-dodecane, n-hexadecane, 2,2,4,4,6,8,8-heptamethylnonane, n-octacosane, squalane, 1-dodecanol, 1,12-dodecandiol, 2-butyl-1-octanol, 1-hexadecanol and 2-hexyl-1-decanol were performed under saturation conditions over the temperature range from 303.15 K (348.15 K for n-octacosane and 1-hexadecanol, 373.15 K for 1,12-dodecandiol) to 573.15 K. The combined expanded uncertainties of temperature and surface tension with a level of confidence of 0.95 (k = 2) are estimated to be 20 mK and less than 1.5% over the entire temperature, respectively. Furthermore, the surface tension data were correlated with the modified van der Waals equation, and the average absolute deviations are within 0.65%. On the basis of the correlations, the comparisons of our experimental data with the available literature data were discussed, and the satisfactory agreement revealed that the experimental results of this work were reliable and reasonable.
研究领域:
化学工程
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物理化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2016
·Vol. 32
·期 1
·100-105
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IF 1.086
Lü Ping,Zhao Guanjia,Zhang Xiaolong,Yin Jianguo,Bao Junfeng
Pendent drop method was adopted to measure the surface tension of dimethyl sulfoxide(DMSO)/water mixtures. A new pendent drop apparatus was built up and checked with water, and a good agreement of our data with literature could be found. With the new apparatus, the surface tensions of nine DMSO/water mixtures with mass fractions of water from 0.1 to 0.9 were investigated in a temperature range of 298―338 K. The expanded uncertainty for surface tension measurement was estimated to be 0.5% at a confidence level of 95%( k =2) in the whole temperature range. A thermodynamic-based relation was used to predict the surface properties of DMSO/water mixtures. Based on the relation and Gibbs adsorption theory, a prediction model was proposed for the calculation of surface relative excess and the thickness of the surface molecule layer.
研究领域:
物理化学
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表面科学
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产品关联
DOI
高影响因子
REVIEW OF SCIENTIFIC INSTRUMENTS
·
2017
·Vol. 88
·期 11
·
IF 1.515
Li Chuanjun,Cao Yang,Guo Rui,He Shengya,Xuan Weidong,Li Xi,Zhong Yunbo,Ren Zhongming
The contact angle (CA) goniometer adaptable to a superconducting magnet was developed based on the sessile drop method. The goniometer mainly consisted of the sampling system, the supporting system, and the image acquisition system. Some improvements were taken to avoid the effects of the magnetic field (MF) on the CA measurement. As an example, the CAs of water on two substrates of silica and polymethyl methacrylate (PMMA) were measured using the goniometer. The results with and without a MF showed a good repeatability and reliability. Additionally, the MF was found to reduce the CA of water, which probably stemmed from the change of the surface tension in the MF. The CA goniometer will become an important tool which is used to study the wettability of liquids on a solid in the MF.
研究领域:
材料科学
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物理学
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表面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FLUID PHASE EQUILIBRIA
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2017
·
IF 2.473
Qiaoyan Shang,Shuqian Xia,GuanWei Cui,Bo Tang,Peisheng Ma
Interfacial tension (IFT) is crucial for characterizing the phase and interphase behavior in the enhanced oil recovery (EOR) process. CO 2 and N 2 are commonly used as injection gases in the EOR process. In this work, an experimental apparatus using the pendent drop method was adopted to measure IFTs for the EOR process with different injection gases, temperatures (40.0–120.0 °C) and pressures (0.22–17.32 MPa). The relative Gibbs adsorption isotherm ( Γ ij ) of a species i on species j were calculated by the experimental IFTs. Theoretically, new correlations were proposed to predict paraffin IFTs for pure CO 2 and mixture gas (CO 2 + N 2 ) injection. A total of 561 and 268 experimental IFTs were used to derive the correlations for pure CO 2 and mixture gas injection, respectively. The square of correlation coefficient ( R 2 ), root mean square error ( RMSE ) and average absolute relative deviations ( AARD ) for pure CO 2 were 0.9884, 0.58 and 5.45%, respectively. For the mixture gas injection, the R 2 , RMSE and AARD of the correlation were 0.9851, 0.57 and 4.47%, respectively.
研究领域:
石油工程
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化学工程
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热力学
✓ 已验证
产品关联
DOI
高影响因子
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