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二元液体混合物的过量体积模型 被引量:1
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作者 丁舒静 沈晓燕 刘国杰 《化工学报》 EI CAS CSCD 北大核心 2004年第7期1041-1046,共6页
按照提出的含醇溶液形成的热力学模型 ,采用释放和充入组分间引力势能的方法建立了一个过量体积方程 ,表明含醇溶液的过量体积主要取决于组分解缔和它们间交叉缔合引起的焓变以及模型中释放或充入的组分间引力势能 .该方程有良好的通用... 按照提出的含醇溶液形成的热力学模型 ,采用释放和充入组分间引力势能的方法建立了一个过量体积方程 ,表明含醇溶液的过量体积主要取决于组分解缔和它们间交叉缔合引起的焓变以及模型中释放或充入的组分间引力势能 .该方程有良好的通用性 ,不仅适用于含醇溶液 ,也适用于非含醇溶液 .广泛的检验表明 ,它能满意地关联各种二元液体混合物的过量体积随组成变化的实验数据 . 展开更多
关键词 含醇溶液 二元液体混合物 过量体积 热力学模型
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水平螺旋槽管壁面二元混合液体升膜形成的试验研究 被引量:1
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作者 梅宁 赵杰 +1 位作者 于海燕 程金强 《热科学与技术》 CAS CSCD 2008年第3期273-278,共6页
对二元液体混合物在蒸发状态下水平螺旋槽管管外壁面形成升膜进行了试验研究,实测了水平螺旋槽管壁面二元混合液体升膜的速度场和表面温度场,分析了水平螺旋槽管壁面热流密度和流体性质对壁面液膜特性的影响。结果表明:同一升膜工质,螺... 对二元液体混合物在蒸发状态下水平螺旋槽管管外壁面形成升膜进行了试验研究,实测了水平螺旋槽管壁面二元混合液体升膜的速度场和表面温度场,分析了水平螺旋槽管壁面热流密度和流体性质对壁面液膜特性的影响。结果表明:同一升膜工质,螺旋槽管的热流密度越大,液膜的爬升速度越大;流体性质对升膜的流动特性和温度分布特性有显著的影响,酒精溶液的浓度越高,液膜的流动性越好,表面总体温度越低,换热系数越小。 展开更多
关键词 二元液体混合物 水平螺旋槽管 升膜 温度场 速度场
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计算有机二元混合液导热系数的一种方法
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作者 黄科林 《贵州化工》 1995年第3期31-36,共6页
本文在Wohl型方程之上,结合Chapman导热理论和Egring的反应速率理论,导出了一个二元液体混合物导热系数关联式,该关联式对于非理想程度中等、特别是接近理想的二元体系精度较高.计算了14种二元混合液体导热系数... 本文在Wohl型方程之上,结合Chapman导热理论和Egring的反应速率理论,导出了一个二元液体混合物导热系数关联式,该关联式对于非理想程度中等、特别是接近理想的二元体系精度较高.计算了14种二元混合液体导热系数,与文献值相比最大误差为3.2%。 展开更多
关键词 二元液体混合物 导热系数 关联式 反应速率 混合 有机 二元体系 中等 方程 最大
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醇类的缔合与热压力系数测定
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作者 胡宇军 张锐 +1 位作者 黑恩成 刘国杰 《化学世界》 CAS CSCD 1996年第S1期75-77,共3页
醇类的缔合与热压力系数测定胡宇军,张锐,黑恩成,刘国杰(华东理工大学化学系上海200237)醇类是一种强缔合物质,由于氢键的缔合作用,使它们的许多性质与一般流体不同。因此搞清缔合作用,不仅在理论上,而且在工程应用上都... 醇类的缔合与热压力系数测定胡宇军,张锐,黑恩成,刘国杰(华东理工大学化学系上海200237)醇类是一种强缔合物质,由于氢键的缔合作用,使它们的许多性质与一般流体不同。因此搞清缔合作用,不仅在理论上,而且在工程应用上都具有重要意义。目前研究缔合的主要手... 展开更多
关键词 热压力系数 环己烷混合物 自缔合 刘国杰 乙醇 缔合作用 排斥体积 二元液体混合物 热力学关系式 华东理工大学
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Intermolecular Interactions in Binary Liquid Mixtures of Styrene with m-, o-, or p-xylene 被引量:1
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作者 ALI Anwar NABI Firdosa 《物理化学学报》 SCIE CAS CSCD 北大核心 2008年第1期47-54,共8页
密度(),超声的速度(),并且有m-,o-,或p二甲苯的苯乙烯(猪圈)的二进制混合物的折射索引(n),他们的纯液体包括那些,在温度在全部作文范围上被测量 298.15 , 303.15 , 308.15 ,并且 313.15 K 。过量卷(VE ) ,在 isentropic 压... 密度(),超声的速度(),并且有m-,o-,或p二甲苯的苯乙烯(猪圈)的二进制混合物的折射索引(n),他们的纯液体包括那些,在温度在全部作文范围上被测量 298.15 , 303.15 , 308.15 ,并且 313.15 K 。过量卷(VE ) ,在 isentropic 压缩的可能性(ks ) 的偏差,声学的阻抗(Z) ,和折射索引(n) 从试验性的数据被计算。部分臼齿的体积(V0,2 ) 和在苯乙烯的二甲苯的部分臼齿的 isentropic 压缩的可能性(K0,2 ) 也是计算的。导出的功能也就是, VE, ks, Z, n, V0,2,和 K0,2 被用来有发生在现在的液体混合物的部件分子之间的分子间的相互作用的更好的理解。这些参数的变化建议在苯乙烯和 o- , m- ,或 p 二甲苯分子之间的相互作用跟随序列:p 二甲苯 >o 二甲苯 >m 二甲苯。除了为 VE 的计算使用密度数据,臼齿的体积也是的过量估计了使用折射索引数据。而且,混合规则的几个折射索引被用来理论上估计学习液体混合物的折射索引。总的来说,计算并且测量的数据以在混合部件之间的相互作用被解释。 展开更多
关键词 分子间相互作用 二元液体混合物 苯乙烯 二甲苯 折射率 热力学
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Study on Excess Thermodynamic Parameters and Theoretical Estimation of Ultrasonic Velocity Using Scaled Particle Theory in Binary Liquid Mixtures of 2-Methyl-2-propanol and Nitriles at Different Temperatures 被引量:2
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作者 K. Rajagopal S. Chenthilnath 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2010年第5期804-816,共13页
Density, ρ, ultrasonic speed, u, and viscosity, η, of binary mixtures of 2-methyl-2-propanol (2M2P) with acetonitrile (AN), propionitrile (PN) and butyronitrile (BN) including those of pure liquids are measured over... Density, ρ, ultrasonic speed, u, and viscosity, η, of binary mixtures of 2-methyl-2-propanol (2M2P) with acetonitrile (AN), propionitrile (PN) and butyronitrile (BN) including those of pure liquids are measured over the entire composition range at temperatures 298.15, 303.15 and 308.15 K. From these experimental data, the excess available volume, E a V , excess free volume, E f V , excess isothermal compressibility, E T β , excess thermal expansion coefficient, E α , and excess internal pressure, E i π , are calculated. The variation of these properties with composition and temperature are discussed in terms of molecular interactions between unlike molecules of the mixtures. It is found that the values of E a V , E f V , E T β and E α are positive and those of E i π are negative for all the mixtures at each temperature studied, indicating the presence of weak interactions between 2M2P and AN/PN/BN molecules. The variations of E a V , E f V , E T β , E α and E i π values with composition indicate that the interactions in these mixtures follow the order: AN<PN<BN, i.e., the 2M2P-nitrile interaction decreases with the increase of alkyl chain length in these nitrile molecules. In addition, the theoretical ultrasonic velocity is calculated using the scaled particle theory and compared with the experimental values. 展开更多
关键词 2-methyl-2-propanol homologous nitriles excess properties molecular interactions scaled particle theory
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Excess Molar Volume, Viscosity and Heat Capacity for the Binary Mixture of p-Xylene and Acetic Acid at Different Temperatures 被引量:1
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作者 杨长生 马沛生 +2 位作者 唐多强 尹秋响 赵长伟 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2002年第5期604-609,共6页
Experimental densities, viscosities and heat capacities atdifferent temperatures were presented over the entire range of molefraction for the binary mixture of p-xylene and acetic acid. Densityvalues were used in the ... Experimental densities, viscosities and heat capacities atdifferent temperatures were presented over the entire range of molefraction for the binary mixture of p-xylene and acetic acid. Densityvalues were used in the determination of excess molar volumes, V^E.At the same time, the excess viscosity and excess molar heatcapacities were calculated. The values of V^E, η~E and c^E_p werefitted to the Redlich-Kister equation. Good agreements were observed.The excess molar volumes are positive with a large maximum valuelocated in the central concentration range. 展开更多
关键词 VISCOSITY heat capacity DENSITY excess molar volume
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Densities and Viscosities of the Ionic Liquid [C4mim][PF6]+ N,N-dimethylformamide Binary Mixtures at 293.15 K to 318.15 K 被引量:12
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作者 耿彦芳 王腾芳 +3 位作者 虞大红 彭昌军 刘洪来 胡英 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2008年第2期256-262,共7页
Viscosities and densities for 1-butyl-3-methylimidazolium hexafluorophosphate ([C4mim][PF6]) and N, N-dimethylformamide (DMF) binary mixtures have been measured at the temperature range from 293.15 K to 318.15 K. ... Viscosities and densities for 1-butyl-3-methylimidazolium hexafluorophosphate ([C4mim][PF6]) and N, N-dimethylformamide (DMF) binary mixtures have been measured at the temperature range from 293.15 K to 318.15 K. It is shown that the viscosities and densities decrease monotonously with temperature and the content of DMF. Various correlation methods including Arrhenius-like equation, Sedclon et al.'s equation, Redlich-Kister equation with four parameters, and other empirical equations were applied to evaluate these experimental data. A model based on an equation of state Ior estimating the viscosity of mixtures containing ionic liquids were proposed by coupling with the excess Gibbs free energy model of viscosity, which can synchronously calculate the viscosity and the molar volume. The results show that the model gives a deviation of 8.29% for the viscosity, and a deviation of 1.05% for the molar volume when only one temperature-independent adjustable parameter is adopted. The correlation accuracy is further improved when two parameters or one temperature-dependent parameter is used. 展开更多
关键词 ionic liquid N N-DIMETHYLFORMAMIDE density viscosity [C4mim][PF6] correlation
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Density and Excess Molar Volume of Binary Mixtures ofp-Xylene+Acetic Acid and o-Xylene+Acetic Acid at Different Temperatures and Pressures
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作者 杨天宇 夏淑倩 +1 位作者 邸志国 马沛生 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2008年第2期247-255,共9页
A new apparatus was designed with a thick-walled glass capillary, electric heater tube with red copper and heat preservation. The thick-walled glass capillary was used for its advantages of resistance to acid corrosio... A new apparatus was designed with a thick-walled glass capillary, electric heater tube with red copper and heat preservation. The thick-walled glass capillary was used for its advantages of resistance to acid corrosion and pressure, and ease of observation. The experimental densities over the entire range of mole fraction for the binary mixture of p-xylene+acetic acid and o-xylene+acetic acid were measured using the new apparatus at temperatures ranging from 313.15K to 473.15K and pressure ranging from 0.20 to 2,0 MPa. The density values were used in the determination of excess molar volumes, W. The Redlich-Kister equation was used to fit the excess molar volume values, and the coefficients and estimate ot the standard error values were presented. The experimental resuits prove that the density measurement apparatus is successful. 展开更多
关键词 DENSITY excess molar volume P-XYLENE O-XYLENE acetic acid
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Molecular Dynamics Simulation for the Binary Mixtures of High Pressure Carbon Dioxide and Ionic Liquids 被引量:2
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作者 徐君臣 王松 +3 位作者 喻文 徐琴琴 王伟彬 银建中 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2014年第2期153-163,共11页
Molecular dynamics simulation with an all-atom force field has been carded out on the two binary sys- tems of [bmim][PF6]-CO2 and [bmim][NO3]-CO2 to study the transport properties, volume expansion and micro- structur... Molecular dynamics simulation with an all-atom force field has been carded out on the two binary sys- tems of [bmim][PF6]-CO2 and [bmim][NO3]-CO2 to study the transport properties, volume expansion and micro- structures. It was found that addition of CO2 in the liquid phase can greatly decrease the viscosity of ionic liquids (ILs) and increase their diffusion coefficient obviously. Furthermore, the volume expansion of ionic liquids was found to increase with the increase of the mole fraction of CO2 in the liquid phase but less than 35% for the two simulated systems, which had a significant difference with CO2 expanded organic solvents. The main reason was that there were some void spaces inter and intra the molecules of ionic liquids. Finally, site to site radial distribution functions and corresponding number integrals were investigated and it was found that the change of microstructures of ILs bv addition CO2 had a great influence on the orooerties of ILs. 展开更多
关键词 molecul~ dynamics simulation carbon dioxide ionic liquids DIFFUSION MICROSTRUCTURE
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Evaporation of a Thin Binary Liquid Film by Forced Convection into Air and Superheated Steam 被引量:1
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作者 Abdelaziz Nasr Chokri Debbissi Sassi Ben Nasrallah 《Journal of Thermal Science》 SCIE EI CAS CSCD 2010年第4期346-356,共11页
This paper deals with a numerical analysis of the evaporation of a thin binary liquid film by forced convection inside a channel constituted by two plates.The first plate is externally insulated and wetted by a thin w... This paper deals with a numerical analysis of the evaporation of a thin binary liquid film by forced convection inside a channel constituted by two plates.The first plate is externally insulated and wetted by a thin water ethylene glycol film while the second is dry and isothermal.The first part is concerned with the effects of inlet ambiance conditions and the liquid concentration of ethylene glycol on the distribution of the velocity,temperature,concentrations profiles and the axial variation of the evaporation rate.The second part is focused on the inversion temperature point of the evaporation of binary liquid film.Results show that the inversion temperature phenomenon for the evaporation of binary liquid mixture is observed for high liquid concentration of ethylene glycol.The present results show that in the inlet temperature range considered here,the inversion temperature does not exit for the evaporation of pure ethylene glycol. 展开更多
关键词 Binary liquid film EVAPORATION inversion temperature forced convection combined heat and mass transfer
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Vapor-liquid equilibria of CH_4, CO_2 and their binary system CH_4 + CO_2: A comparison between the molecular simulation and equation of state 被引量:1
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作者 YANG Zhi GONG Mao Qiong +4 位作者 ZHOU Yuan DONG Xue Qiang LI Xiao Dong LI Hui Ya WU Jian Feng 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2015年第4期650-658,共9页
An accurate knowledge about phase behaviors of CH4, CO2 and their binary mixture is crucial in fields of natural gas liquefaction and refrigeration applications. In this work, two all-atom force fields of TraPPE-EH an... An accurate knowledge about phase behaviors of CH4, CO2 and their binary mixture is crucial in fields of natural gas liquefaction and refrigeration applications. In this work, two all-atom force fields of TraPPE-EH and EMP2 were used for the components CH4 and CO〉 respectively. Then the vapor-liquid equilibria (VLE) of CH4, CO2 and their binary system were calculated via the NVT- and NpT Gibbs Ensemble Monte Carlo Simulations. Meanwhile the traditional method using Equation of State (EoS) to correlate the VLE properties was also investigated. The EoSs considered in this work were three classic cubic RK, SRK, PR and another advanced molecular-based PC-SAFT equations. For pure components, both molecular simulations and the PC-SAFT EoS could obtain satisfactory predictions for all the saturated properties. However, the saturated liquid densities calculated by the cubic EoSs were not so good. It was also observed that the TraPPE-EH force field had a good representation for CH4 molecule, while the EMP2 force field was not enough accurate to represent CO2 molecules. For the mixture CH4 + CO2, SRK and PR showed the best predictions for the saturated pressure-component property, while good results were also obtained via molecular simulations and PC-SAFT EoS. It was suggested that special combining rules or binary interaction parameters were important to obtain enough accurate prediction of the mixed phase behavior. Compared with the cubic EoS, the PC-SAFT and molecular simulation method showed better adaptabilities for both the pure and mixture systems. Besides, the accurate molecular parameters used in the PC-SAFT and molecular simulations could bring about direct and deep understanding about the molecular characteristics. 展开更多
关键词 molecular simulation equation of state CH4 CO2 vapor-liquid equilibrium
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The physicochemical properties of some imidazolium-based ionic liquids and their binary mixtures 被引量:6
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作者 NING Hui HOU MinQiang +3 位作者 MEI QingQing LIU YuanHui YANG DeZhong HAN BuXing 《Science China Chemistry》 SCIE EI CAS 2012年第8期1509-1518,共10页
The density, viscosity and conductivity of ionic liquids (ILs), 1-octyl-3-methylimidazolium tetrafluoroborate ([omim][BF4]), 1-octyl-3-methylimidazolium chloride ([omim][C1]), 1-hexyl-3-methylimidazolium tetrafl... The density, viscosity and conductivity of ionic liquids (ILs), 1-octyl-3-methylimidazolium tetrafluoroborate ([omim][BF4]), 1-octyl-3-methylimidazolium chloride ([omim][C1]), 1-hexyl-3-methylimidazolium tetrafluoroborate ([hmim] BF4]), 1-hexyl- 3-methylimidazolium chloride ([hmim][C1]), 1-hexyl-3-methylimidazolium hexafluorophosphate ([hmim][PF6]), and the [omim][BF4] + [omim][Cl], [hmim][BF4] + [hmim][C1], and [hmim][PF6] + [hmim][C1] binary mixtures were studied at dif- ferent temperatures. It was demonstrated that the densities of both the neat ILs and their mixtures varied linearly with temper- ature. The density sensitivity of a binary mixture is between those of the two components. The excess molar volumes (l/e) of [hmim][BF4] + [hmim][C1] and [hmim][PF6] + [hmim][C1] mixtures are positive in the whole composition range. For [omim][BF4] + [omim][C1], the VE is also positive in the [omirn][C1]-rich region, but is negative in the [omim][BF4]-rich re- gion. The viscosity or conductivity of a mixture is in the intermediate of those of the two neat ILs. For all the neat ILs and the binary mixtures studied, the order of conductivity is opposite to that of the viscosity. The Vogel-Tammann-Fulcher (VTF) equations can be used to fit the viscosity and conductivity of all the neat ILs and the binary mixtures. The neat ILs and their mixtures obey the Fractional Walden Rule very well, and the values of the Walden slopes are all smaller than unit, indicating obvious ion associations in the neat ILs and the binary mixtures. 展开更多
关键词 ionic liquids density viscosity CONDUCTIVITY Walden rule
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