JOURNAL OF CHEMICAL THERMODYNAMICS
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2016
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IF 2.196
Dong Fu,LeMeng Wang,XiangFeng Tian
The surface tension (γ) of 2-diethylaminoethanol (DEAE), DEAE-monoethanolamine (MEA), and DEAE-piperazine (PZ) aqueous solutions was measured by using the BZY-1 surface tension meter. The temperature ranged from 303.2 K to 323.2 K. The mass fraction of DEAE, MEA and PZ respectively ranged from 0.30 to 0.50, 0.05 to 0.15 and 0.025 to 0.075. An equation was proposed to model the surface tension and the calculated results agreed well with the experiments. The effects of temperature and mass fraction of amines on the surface tension were demonstrated on the basis of experiments and calculations.
研究领域:
化学工程
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2017
·
IF 2.726
Dong Fu,Jialin Xie,Fang Wang,Shengqi Wang
The surface tension (γ) and viscosity ( η ) of monoethanolamine (MEA)-methanol (MeOH) and diethanolamine (DEA)-MeOH aqueous solutions were measured by using the BZY-1 surface tension meter and the NDJ-5S digital rotational viscometer. The temperature ranged from 303.2 K to 323.2 K. The mass fractions of MeOH, MEA and DEA ranged from 0.025 to 0.075, 0.2 to 0.4 and 0.2 to 0.4 respectively. Equations were proposed to model the surface tension and viscosity respectively and both the calculated results agreed well with the experiments. The effects of temperature and mass fraction of MeOH/amines on the surface tension and viscosity were demonstrated on the basis of experiments and calculations.
研究领域:
化学工程
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物理化学
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产品关联
DOI
高影响因子
International Journal of Refrigeration
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2017
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IF 2.779
Zhong Lan,Xuehu Ma,Zhaolong Hao,Rui Jiang
This work mainly focuses on the determination of the saturated vapor pressure of LiBr aqueous solution with mass fraction ranging from 43.14 to 65.26 wt% at high temperature experimentally. First, the measurement of the saturation vapor pressures is conducted in deionized water as well as in LiBr aqueous solution at a lower temperature. The experimental result has a good agreement with the literature value, which verified the reliability and accuracy of the experimental apparatus. Second, measurement of the saturated vapor pressure of LiBr aqueous solution with mass fraction ranging from 43.14 to 65.26 wt% is systematically carried out in the 156.06~257.84 °C temperature range. Based on the saturated vapor pressure data at lower temperature, a correlation for predicting the saturated vapor pressure data of the LiBr aqueous solution is obtained, which is also available for high temperature condition. Therefore, this work will be very helpful for the modeling and design of high temperature LiBr/H 2 O absorption heat transformers.
研究领域:
化学工程
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热力学
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DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2017
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IF 3.648
Jialin Xie,Fang Wang,Dong Fu
The surface tensions (γ) of 2-diethylaminoethanol (DEAE)–tetramethylammonium glycinate ([N 1111 ][Gly]), DEAE–1-butyl-3-methylimidazolium glycinate ([Bmim][Gly]) and DEAE–1-butyl-3-methylimidazolium l -lysinate ([Bmim][Lys]) aqueous solutions were measured by using the BZY-1 surface tension meter. The temperature ranged from 303.2 K to 323.2 K. The mass fractions of DEAE and amino acid ionic liquids (AAILs) respectively ranged from 0.30 to 0.50 and 0.025 to 0.075. A thermodynamic equation was proposed to model the surface tension and the calculated results agreed well with the experiments. The effects of temperature and mass fractions of DEAE and AAILs on the surface tension were demonstrated on the basis of experiments and calculations. The surface enthalpy and surface entropy were determined and their concentration dependences were illustrated.
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
JOURNAL OF CHEMICAL THERMODYNAMICS
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2016
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IF 2.196
Dong Fu,LeMeng Wang,ChenLu Mi,Pan Zhang
The absorption capacity of CO 2 in piperazine (PZ) promoted 2-diethylaminoethanol (DEAE) aqueous solution was measured. The viscosities of both CO 2 -unloaded and CO 2 -loaded PZ-DEAE aqueous solutions were measured and then modelled. The temperatures ranged from 303.2 K to 323.2 K. The mass fraction of PZ and DEAE respectively ranged from 0 to 0.075 and 0.3 to 0.5. The temperature and concentration dependences of absorption capacity were determined. The effects of temperature, mass fraction and CO 2 loading on viscosities are demonstrated.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
Reaction Chemistry & Engineering
·
2021
·Vol. 7
·期 1
·111-122
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IF 4.239
Jing Song,Yongjin Cui,Guangsheng Luo,Jian Deng,Yujun Wang
o-Nitrotoluene nitration can produce 2,4-dinitrotoluene and 2,6-dinitrotoluene simultaneously, which is also the common side-reaction of toluene mononitration. Kinetic study is helpful to deepen the understanding of nitration and control the reaction better. A homogeneously continuous microflow system was constructed to determine the kinetic parameters of 2-MNT nitration. A complete kinetic model was established and all kinetic parameters were obtained. In general, the observed reaction rate will increase with increasing H2SO4 mass fraction. However, when the H2SO4 mass fraction increases to a certain value, the observed reaction rate decreases. This is the first time to report the maximum observed reaction rate constant corresponding to the H2SO4 mass fraction at different temperatures in this work. Compared to previous reports on this reaction, the system provides more accurate kinetic parameters and can be developed into a reliable platform for the kinetic study of similar reactions.
研究领域:
化学工程
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反应动力学
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DOI
高影响因子
POLYMER TESTING
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2022
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IF 4.931
Ying Chen,Jie Li,Jiawei Lu,Meng Ding,Yi Chen
PVA hydrogels with high strength and toughness are fabricated by dual physical and chemical cross-linking. The best comprehensive mechanical properties can be achieved by reaction at room temperature followed with freeze-thaw and annealing treatment. Besides, the mechanical properties of PVA hydrogel increased first and then decreased with the increase of molecular weight or mass fraction. By changing the reaction solvent, the mechanical properties of PVA hydrogel could also be effectively adjusted. Therefore, the influences of various factors on the mechanical properties of PVA hydrogel can be obtained.
研究领域:
生物材料
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高分子科学
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组织工程
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生物医学工程
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软物质物理
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药物递送系统
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DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2025
·
IF 4
Lei Yu,Bo Liu,Pucheng Wang,Shuai Liu,Junjie Sheng,Yinyong Ao
1,4-Bis(phenylethynyl)benzene blended with an activated carbon-supported palladium catalyst (DEB-Pd/C) has been demonstrated as an effective hydrogen scavenger in reducing hydrogen gas accumulation within vacuum-sealed and hermetically closed systems. Accurate determination of the hydrogen mass fraction in reacted 1,4-bis(phenylethynyl)benzene is essential for guiding the replacement of hydrogen-absorbing materials. In this study, a novel method for determining the hydrogen mass fraction in reacted DEB was developed. First, the reaction products of DEB with hydrogen gas were isolated and characterized using gas chromatography-mass spectrometry (GC-MS). A correlation between the peak areas of the reaction products and the saturation level of DEB was established. The hydrogen mass fraction in the reacted DEB was precisely determined based on the relationship between DEB saturation and hydrogen content. Furthermore, the effect of O₂ on the hydrogen uptake of DEB was investigated using the developed method. The results demonstrate that this method exhibits high detection sensitivity and accuracy for determining the hydrogen mass fraction in reacted DEB, offering a reliable approach for monitoring hydrogen absorption in such systems.
研究领域:
分析化学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2022
·
IF 3.119
Yun-Jia Liu,Liu-Ying Yu,Ke-Jun Wu,Chao-Hong He
In this work, the thermal conductivities of 1,3-dichloro-2-propanol + N,N-dimethylformamide (DMF) were measured from 303 to 368 K at pressures up to 15.10 MPa by using a transient hot-wire method. Measurements were made for six compositions over the entire concentration range from 0 to 1 mass fractions of DMF, namely, 0.000, 0.200, 0.400, 0.600, 0.800, and 1.000 mass fractions of DMF. The experimental data were correlated as a function of temperature, pressure, and mass fraction of DMF. The expanded uncertainty of the obtained data was estimated to be 2% with a confidence level of 0.95 (k = 2).
研究领域:
热力学
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化学工程
·
物理化学
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2019
·
IF 4.561
Pan Zhang,Lemeng Wang,Chunjie Lu,Mengying Li,Shujun Yu,Dong Fu
The surface tensions of 2‑diethylaminoethanol (DEAE)‑ N ‑(2‑aminoethyl)ethanolamine (AEEA), DEAE‑ N ‑methyl‑1,3‑propane‑diamine (MAPA) and DEAE‑1,4‑butanediamine (BDA) aqueous solutions have been measured by using the BZY-1 surface tension meter. The mass fractions of DEAE and AEEA/MAPA/BDA respectively ranged from 0.300 to 0.500 and 0.050 to 0.150. The temperature ranged from 303.2 K to 323.2 K. A thermodynamic equation was proposed to model the surface tension and the calculated results agreed well with the experiments. The effects of temperature and mass fraction of amines on the surface tension were demonstrated on the basis of experiments and calculations. The surface thermodynamics including surface enthalpy and surface entropy of blended amine aqueous solutions were also determined, and their temperature and mass fraction dependences were analyzed.
研究领域:
物理化学
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溶液化学
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热力学
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表面科学
·
化工材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Boxuan Lou,Yue Xu,Xiaolan Qin,Chang Liu,Shujun Wang,Haikuan Yuan,Xijian Liu,Lijuan Zhang,Jie Lu
In this work, the solubility of unsolvated crystalline (R)-equol in six (alcohols + n -heptane) binary solvents and that of solvated crystalline (R)-equol in methanol along with ethanol were firstly systematically measured and analyzed. The experimental results revealed that the solubility of unsolvated crystalline (R)-equol was positively correlated with temperature and mass fraction of alcohol. And the solubility order was 2-propanol > 1-propanol > 1-butanol > 1-pentanol > 3-methyl-1-butanol > 2-methyl-1-propanol > n -heptane. The transformation temperatures between unsolvated and solvated forms were acquired at 316.28 K and 310.50 K, respectively. Meanwhile, the experimental solubility data of unsolvated crystalline (R)-equol were correlated using modified Apelblat, λh , quartic polynomial and CNIBS/R-K equations, in which the modified Apelblat equation achieved the best regression performance. Besides, the dissolution of unsolvated crystalline (R)-equol was endothermic. Furthermore, solvent parameters, solvation free energy and molecular electrostatic potential surface obtained through molecular simulation were used to explain the experimental phenomena, and found the polarity of solvents, van der Waals and hydrogen bonding interactions made different contributions to various dissolution processes.
研究领域:
药学
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物理化学
·
分子模拟
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）