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1. CFD simulations on hydrogenation of 2-ethylanthraquinone under Taylor flow in microchannels with and without chemical reaction | |||
Yaru Guo,Zhigang Lei,Chengna Dai | |||
Chemical Engineering 06 May 2016 | |||
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Abstract:The characteristics of mass transfer under Taylor flow with and without chemical reaction in circularmicrochannelswere investigated by Computational Fluid Dynamics (CFD) using the hydrogenation process of 2-ethylanthraquinone (EAQ) as a model reaction.The volumetric mass transfer coefficients in liquid phase (kLa) without chemical reaction were calculated for various parameters such as channel diameter, bubble rise velocity, unit cell length, and so on.The trend ofkLa with various parameters was obtained.The enhancement factor ofmass transferβ was introducedto quantitatively analyze mass transfer enhancement phenomenondue to the consumption of hydrogenunder chemical reaction. | |||
TO cite this article:Yaru Guo,Zhigang Lei,Chengna Dai. CFD simulations on hydrogenation of 2-ethylanthraquinone under Taylor flow in microchannels with and without chemical reaction[OL].[ 6 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4686639 |
2. The Solubilities and Physicochemical Properties of the Aqueous Ternary System Containing Lithium, Rubidium and Borate Ions at 348 K | |||
YU Xudong,ZENG Ying,LUO Yulin,ZHANG Yu,LIU Zhou | |||
Chemical Engineering 05 January 2015 | |||
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Abstract:In this paper, the solubility values and physicochemical properties of electrolyte mixtures in ternary system containing lithium, rubidium and borate ions were studied at 348 K by isothermal dissolution method. The crystalloid forms of the solid phase were determined using a schreinermarks wet residue method. On the basis of the experimental data, the stable equilibrium phase diagram and the physicochemical properties vs composition in the ternary system at 348 K were plotted. The experimental results show that this system is of a simple eutectic type system, no double salt or solid solution formed at 348 K. The phase diagram consists of one invariant point, two uninvariant curves, and two crystallization regions. The crystallization regions correspond to lithium tetraborate trihydrate (Li2B4O7o3H2O) and rubidium pentaborate tetrahydrate (RbB5O6(OH) 4o2H2O). Salt Li2B4O7o3H2O has lager crystallization field, whereas salt RbB5O6(OH) 4o2H2O has smaller crystallization field. | |||
TO cite this article:YU Xudong,ZENG Ying,LUO Yulin, et al. The Solubilities and Physicochemical Properties of the Aqueous Ternary System Containing Lithium, Rubidium and Borate Ions at 348 K[OL].[ 5 January 2015] http://en.paper.edu.cn/en_releasepaper/content/4626761 |
3. Lattice Boltzmann simulation of the lateral migration of a particle in constant shear flow | |||
LIU Malin | |||
Chemical Engineering 01 May 2014 | |||
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Abstract:The lateral migration of a particle in constant shear flow was investigated using the 3D lattice Boltzmann method. Relationships between particle rotation velocity, lateral velocity, equilibrium lateral position and wall velocity were analyzed and the slip velocity was discussed. Lateral forces, including shear lift force, rotational lift force and lateral drag force, were calculated from the simulation results. The total lateral force changed sign before reaching the equilibrium position. The shear lift force and lateral drag force were much larger than the rotation lift force. The balance between them determined the particle equilibrium lateral position. A new correlation for the shear lift force is proposed by analogy with Saffman's expression. | |||
TO cite this article:LIU Malin. Lattice Boltzmann simulation of the lateral migration of a particle in constant shear flow[OL].[ 1 May 2014] http://en.paper.edu.cn/en_releasepaper/content/4591622 |
4. Slip velocity of a buoyantly neutral particle in shear flow:a mathematical explanation | |||
LIU Malin | |||
Chemical Engineering 02 April 2014 | |||
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Abstract:A calculation of the lateral migration of a buoyantly neutral particle in shear flow using the minimum disturbance principle showed that the slip velocity is important in determining the lateral equilibrium position. A mathematical analysis of the slip velocity using simulation and experimental results is given, which indicated that three factors: particle size, particle initial position and wall effect should be also taken into account in calculating the effective fluid velocity. The analysis, confirmed by lattice Boltzmann method (LBM) simulation, showed that the Segre-Silberberg effect exists in constant shear flow. The validity of the minimum disturbance principle for constant shear flow was verified by the agreement in the particle velocities calculated from the minimum disturbance principle and LBM simulation. | |||
TO cite this article:LIU Malin. Slip velocity of a buoyantly neutral particle in shear flow:a mathematical explanation[OL].[ 2 April 2014] http://en.paper.edu.cn/en_releasepaper/content/4591625 |
5. Nitrogen-Reduced Graphene Oxide Modification for Improving Energy Conversion Efficiency of Dye-Sensitized Solar Cells | |||
Zhonghua Xiang,Xing Zhou,Dapeng Cao | |||
Chemical Engineering 24 March 2014 | |||
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Abstract:As potential third generation photovoltaic cells, the dye-sensitized solar cells (DSSCs) have attracted extensive research interests and have become one of hot topics in current research. In this work, a series of the DSSCs based on the TiO2 photoanodes modified by graphene oxide (GO) and nitrogen reduced graphene oxide (N-rGO) were fabricated. Results indicated that N-rGO is a better TiO2 photoanode modifier of the DSSC, compared to GO. With the increase of addition amount of N-rGO, the open circuit voltage increases, while both the short circuit current and power conversion efficiency (PCE) of the DSSCs exhibit a maximum at the content of 0.2 wt% N-rGO. In particular, the maximum PCE of the DSSCs reaches 7.19% in this work, which gains a 13.23% enhancement compared to the PCE of 6.42% of conventional TiO2 DSSCs. The enhancement of the PCE of the DSSCs with N-rGO was mainly attributed to the reduction of electron recombination and the increase of electron transfer efficiency after incorporating N-rGO into TiO2 photoanodes. | |||
TO cite this article:Zhonghua Xiang,Xing Zhou,Dapeng Cao. Nitrogen-Reduced Graphene Oxide Modification for Improving Energy Conversion Efficiency of Dye-Sensitized Solar Cells[J]. |
6. Study on Solid-liquid Equilibrium of p-nitrotoluene in Carbon Tetrachloride, Acetone, Acetic Acid and Toluene | |||
Zhenxi Jiang,Xianyan Yuan,Xiaowei Cao,Baozeng Ren | |||
Chemical Engineering 14 May 2008 | |||
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Abstract:Using a dynamic method which was designed and installed with computer and laser monitor on line, the solubility values of p-nitrotoluene in carbon tetrachloride, acetone, acetic acid and toluene were measured at temperatures ranging from 284.33K to 315.94K at atmospheric pressure. The experimental data were correlated with Apelbat equation. Results indicated that the method was available and the data obtained were acceptable. | |||
TO cite this article:Zhenxi Jiang,Xianyan Yuan,Xiaowei Cao, et al. Study on Solid-liquid Equilibrium of p-nitrotoluene in Carbon Tetrachloride, Acetone, Acetic Acid and Toluene[OL].[14 May 2008] http://en.paper.edu.cn/en_releasepaper/content/21376 |
7. Multicompartment Micelles Formed from Star-Dendritic Triblock Copolymers in Selective Solvents: A Dissipative Particle Dynamics Study | |||
Dahuan Liu,Chongli Zhong | |||
Chemical Engineering 17 December 2007 | |||
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Abstract:Dissipative particle dynamics method was used to study the multicompartment micelles formed from star-dendritic triblock copolymers in selective solvents, in which particular attention was paid to the effects of dendritic structure. The simulations show that the dendritic structure not only influences the morphology and the formation process of multicompartment micelles formed, but also the response of the micelle structure to solvent quality. The information obtained is useful for the future design of multicompartment micelles for practical applications, especially in the field of drug delivery. | |||
TO cite this article:Dahuan Liu,Chongli Zhong. Multicompartment Micelles Formed from Star-Dendritic Triblock Copolymers in Selective Solvents: A Dissipative Particle Dynamics Study[OL].[17 December 2007] http://en.paper.edu.cn/en_releasepaper/content/17035 |
8. Dissipative particle dynamics study of multicompartment micellar solutions in a slit | |||
Yuanyuan Cui,Dahuan Liu,Chongli Zhong | |||
Chemical Engineering 17 December 2007 | |||
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Abstract:Multicompartment micelles are a new family of micelles that may find wide applications; however, due to their complexity, the knowledge on them is quite limited to date. In this work, dissipative particle dynamics simulations were performed to investigate the morphology and structure of multicompartment micellar solutions confined in two hydrophilic walls, as a function of slit width. The results show that pore width can influence largely the morphology and structure of multicompartment micellar solutions confined in hydrophilic walls, the commonly observed “confinement-induced alignment” also occurs in multicompartment micellar solutions, and confinement can induce new morphologies, which can also speed up and enhance the formation of large multicompartment micelles. In addition, this work shows that a strong external field can change the alignment of multicompartment micelles, leading to new well-defined ordered structures. The information obtained may be useful for experimental investigations, as well as for understanding multicompartment micelles at molecular level. | |||
TO cite this article:Yuanyuan Cui,Dahuan Liu,Chongli Zhong. Dissipative particle dynamics study of multicompartment micellar solutions in a slit[OL].[17 December 2007] http://en.paper.edu.cn/en_releasepaper/content/17023 |
9. Cloud Points of Hydrocarbon Surfactants in Supercritical | |||
Lv Xiaobo ,Su Baogen ,Ren Qilong | |||
Chemical Engineering 13 September 2005 | |||
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Abstract:n recent years, the research on reversed micelles in the continuous supercritical CO2 phase has attracted much attention due to the characteristic that reversed micelles in the supercritical CO2 can solubilize many polar and high molecular weight or hydrophilic molecules, such as amino acids, proteins and many polymers. Unfortunately, many surfactants used in the reversed micelles were fluorinated surfactants and silicanes, which have potential toxicity and cost high. Otherwise only few references about reversed micelles with hydrocarbon surfactants, which can get rid of the shortcomings, have been reported. So the formation of W/C microemulsions with hydrocarbon surfactants is of significant industrial interest. In this work, cloud points of the hydrocarbon surfactants, A(EO)9(PO)2 and A(EO)9(PO)3, were measured in a high-pressure Variable-Volume optical cell. Experiments were operated at the concentration range 0.54-1.5 wt%, and at the temperature range 35-55 ℃. Cloud points pressu | |||
TO cite this article:Lv Xiaobo ,Su Baogen ,Ren Qilong . Cloud Points of Hydrocarbon Surfactants in Supercritical[OL].[13 September 2005] http://en.paper.edu.cn/en_releasepaper/content/2869 |
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